CN110677595A - Exposure control method and device - Google Patents
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- CN110677595A CN110677595A CN201910986719.XA CN201910986719A CN110677595A CN 110677595 A CN110677595 A CN 110677595A CN 201910986719 A CN201910986719 A CN 201910986719A CN 110677595 A CN110677595 A CN 110677595A
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
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Abstract
The invention discloses an exposure control method and a device, wherein the method comprises the steps of setting the paper exposure times of a paper exposure mode as M, and setting the screen exposure times of a screen exposure mode as N; m, N are each integers greater than 0; in the operation of the paper exposure mode, a light supplement lamp is controlled to be synchronously opened and closed along with the opening and closing of a shutter, and when the light supplement lamp is closed and the exposure frequency is greater than or equal to M, the paper exposure mode is switched to the screen exposure mode, and the light supplement lamp is controlled to be opened; and in the screen exposure mode, controlling a light supplement lamp to be closed along with the opening of a shutter and the light supplement lamp to be opened along with the closing of the shutter, and switching the screen exposure mode into the paper exposure mode when the light supplement lamp is opened and the exposure times are more than or equal to N. The invention can realize the function of quickly reading the paper bar code and the screen bar code on one device, and can realize high-speed exposure reading of the paper bar code and good exposure of the screen without extra manual exposure switching mode.
Description
Technical Field
The invention relates to the technical field of identification code scanning, in particular to an exposure control method and device.
Background
Two-dimensional bar code scanners in the market at present are mainly divided into a global shutter sensor and a rolling shutter sensor, the global shutter sensor can expose all pixels at the same time, the rolling shutter sensor can only expose one or a plurality of rows of pixels at the same time, and all rows of pixels are required to be exposed in a circulating mode for complete exposure. Architecturally, global exposures have enough cache to store the exposure value for each pixel, and rolling blind exposures do not have enough cache to store the exposure value for each pixel, thus requiring "time-shared" exposures. Therefore, under the same illumination, the shutter exposure is several times or even tens of times slower than the global exposure, the image is distorted and deformed, and the shutter exposure cannot reflect the real image under the high-speed condition.
In the course of research and practice on the prior art, the inventor of the present invention found that, in the development line of the identification code scanning technology, most devices adopt a rolling shutter sensor, and because the rolling shutter sensor has a long exposure time and a slow imaging speed, the paper and the screen need to be exposed by controlling the shutter time. If fast code reading is to be achieved, such as an industrial barcode scanner, a global shutter sensor must be used, and in order to achieve fast motion adaptability, a very short exposure time (in the order of microseconds) must be used, in which case a high intensity fill light is required. The global shutter sensor can output shutter signals, a light supplement lamp can be started during exposure, the bar code on the paper is irradiated by the high-intensity light supplement lamp to form diffuse reflection to obtain an image, but the method cannot be used for imaging objects such as a liquid crystal screen and the like which display the bar code by self-luminous light. And the brightness of the screen is very weak compared to that required for a quick exposure, so that the same quick exposure imaging is hardly visible. Therefore, in the prior art, no matter the fast exposure for the moving object or the low-speed exposure for the screen, the high-speed paper reading and the screen imaging reading cannot be simultaneously realized on one device, and only the manual switching of the paper exposure or the screen exposure can be relied on.
Disclosure of Invention
The invention provides an exposure control method and device, aiming at solving the technical problems that the conventional paper bar code and screen bar code cannot be read simultaneously and need to be switched manually.
In order to solve the above technical problem, an embodiment of the present invention provides an exposure control method, which at least includes the following steps:
setting the paper exposure times of a paper exposure mode as M and the screen exposure times of a screen exposure mode as N; wherein M, N are integers greater than 0;
in the operation of the paper exposure mode, a light supplement lamp is controlled to be synchronously opened and closed along with the opening and closing of a shutter, and when the light supplement lamp is closed and the exposure frequency is greater than or equal to M, the paper exposure mode is switched to the screen exposure mode, and the light supplement lamp is controlled to be opened;
and in the screen exposure mode, controlling a light supplement lamp to be closed along with the opening of a shutter and the light supplement lamp to be opened along with the closing of the shutter, and switching the screen exposure mode into the paper exposure mode when the light supplement lamp is opened and the exposure times are more than or equal to N.
As a preferred scheme, when the light supplement lamp is turned off and the exposure frequency is greater than or equal to M, the paper exposure mode is switched to the screen exposure mode, and the light supplement lamp is controlled to be turned on, specifically:
in the paper exposure mode, when the light supplement lamp is turned off, adding 1 to a paper exposure counter;
judging whether the exposure times are greater than or equal to M according to the counting of the paper exposure counter;
if not, continuing to operate the paper exposure mode;
and if so, switching the paper exposure mode into the screen exposure mode, and simultaneously controlling the light supplement lamp to be turned on.
As a preferred scheme, if yes, the paper exposure mode is switched to the screen exposure mode, and the light supplement lamp is controlled to be turned on, specifically:
and if the exposure times are judged to be more than or equal to M according to the counting of the paper exposure counter, starting a timer, and starting the light supplement lamp after the first preset time is reached.
As a preferred scheme, when the fill light is turned on and the exposure times are greater than or equal to N, the screen exposure mode is switched to the paper exposure mode, specifically:
in the screen exposure mode operation, adding 1 to a screen exposure counter when the light supplement lamp is turned off;
judging whether the exposure times are greater than or equal to N according to the counting of the screen exposure counter;
if not, continuing to operate the screen exposure mode;
and if so, switching the screen exposure mode to the paper exposure mode.
As a preferred scheme, if not, continuing to operate the screen exposure mode, specifically:
and if the exposure times are judged to be less than N according to the counting of the screen exposure counter, starting a timer, and starting the light supplement lamp after a second preset time is reached.
As a preferable scheme, after the step of setting the paper exposure number of the paper exposure mode as M and the screen exposure number of the screen exposure mode as N, the method further includes:
setting a timer to start a light supplement lamp when the paper exposure mode is switched to the screen exposure mode;
initializing the timer and an external interrupt;
and entering an external interrupt and judging the current exposure mode.
The invention also provides an exposure control device, which comprises a controller applying the exposure control method, wherein the controller is used for:
setting the paper exposure times of a paper exposure mode as M and the screen exposure times of a screen exposure mode as N; wherein M, N are integers greater than 0;
in the operation of the paper exposure mode, a light supplement lamp is controlled to be synchronously opened and closed along with the opening and closing of a shutter, and when the light supplement lamp is closed and the exposure frequency is greater than or equal to M, the paper exposure mode is switched to the screen exposure mode, and the light supplement lamp is controlled to be opened;
and in the screen exposure mode, controlling a light supplement lamp to be closed along with the opening of a shutter and the light supplement lamp to be opened along with the closing of the shutter, and switching the screen exposure mode into the paper exposure mode when the light supplement lamp is opened and the exposure times are more than or equal to N.
Preferably, the controller is further configured to:
in the paper exposure mode, when the light supplement lamp is turned off, adding 1 to a paper exposure counter;
judging whether the exposure times are greater than or equal to M according to the counting of the paper exposure counter;
if not, continuing to operate the paper exposure mode;
and if so, switching the paper exposure mode into the screen exposure mode, and simultaneously controlling the light supplement lamp to be turned on.
Preferably, the controller is further configured to:
and if the exposure times are judged to be less than N according to the counting of the screen exposure counter, starting a timer, and starting the light supplement lamp after a second preset time is reached.
Preferably, the controller is further configured to:
in the screen exposure mode operation, adding 1 to a screen exposure counter when the light supplement lamp is turned off;
judging whether the exposure times are greater than or equal to N according to the counting of the screen exposure counter;
if not, continuing to operate the screen exposure mode;
and if so, switching the screen exposure mode to the paper exposure mode.
Preferably, the controller is further configured to:
and if the exposure times are judged to be more than or equal to M according to the counting of the paper exposure counter, starting a timer, and starting the light supplement lamp after the first preset time is reached.
Preferably, the controller is further configured to:
setting a timer to start a light supplement lamp when the paper exposure mode is switched to the screen exposure mode;
initializing the timer and an external interrupt;
and entering an external interrupt and judging the current exposure mode.
The embodiment of the invention provides an exposure control method and device, and any embodiment of the method has the following beneficial effects:
setting the paper exposure times of a paper exposure mode as M and the screen exposure times of a screen exposure mode as N; in the operation of the paper exposure mode, a light supplement lamp is controlled to be synchronously opened and closed along with the opening and closing of a shutter, and when the light supplement lamp is closed and the exposure frequency is greater than or equal to M, the paper exposure mode is switched to the screen exposure mode, and the light supplement lamp is controlled to be opened; and in the screen exposure mode, controlling a light supplement lamp to be closed along with the opening of a shutter and the light supplement lamp to be opened along with the closing of the shutter, and switching the screen exposure mode into the paper exposure mode when the light supplement lamp is opened and the exposure times are more than or equal to N. Therefore, the invention can realize paper exposure reading on one device and simultaneously realize good exposure of the screen. Moreover, through the operating condition of controlling shutter and light filling lamp, when switching paper exposure mode to screen exposure mode, can effectively realize the exposure parameter and switch, under the circumstances of "stagger" exposure and light filling for the light filling lamp can be closed when the shutter signal is opened, thereby realizes no "ghost" screen exposure. Meanwhile, in order to balance the visual ghost characteristic of naked eyes, the light supplement signal is forged when the shutter is closed, namely, the light supplement lamp is controlled to be turned on when the paper exposure mode is switched to the screen exposure mode so as to balance the visual ghost, and therefore the light and shade alternation of the light supplement lamp is avoided. The light emitted by the light supplement lamp is not limited to visible light, and can be light in other wave bands such as infrared light and ultraviolet light, so that the light supplement can be partially or completely invisible for human eyes or machine vision.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flowchart of the steps of an exposure control method in an embodiment of the present invention;
FIG. 2 is a comparison between the exposure control method according to the embodiment of the present invention and the prior art control method;
fig. 3 is a schematic diagram illustrating states of a shutter and a fill light of the exposure control method in the embodiment of the present invention;
FIG. 4 is a flowchart for initializing a main program of an exposure control method according to an embodiment of the present invention;
FIG. 5 is a flow chart of a timer interrupt service of an exposure control method in an embodiment of the present invention;
FIG. 6 is a flowchart of an external interrupt service of an exposure control method in an embodiment of the present invention;
fig. 7 is a light-on time chart of the exposure control method in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a preferred embodiment of the present invention provides an exposure control method, which can be executed by an identification code scanning device, and includes the following steps:
s11, setting the paper exposure times of the paper exposure mode as M and the screen exposure times of the screen exposure mode as N; wherein M, N are each integers greater than 0.
In the embodiment of the invention, the method mainly realizes that the exposure of paper and screen is performed in the following steps of M: the proportion of N is switched circularly, and M exposure mainly aims at the diffuse reflection highlight characteristic of paper to realize imaging with high movement tolerance and high-speed decoding scanning; n decoding of time is used for the exposure of screen, and the exposure time is than longer, and separates with the light filling lamp in time, can not leave mirror surface reflection's light filling lamp ghost. Due to the transmission speed comparison block, the two switching is almost negligible for a human and the perceived scanning speed is very fast.
The paper exposure mode and the screen exposure mode mainly have different exposure parameters for the shutter sensor, and the use scenes of the invention mainly have different exposure time, gain and the like. Therefore, two sets of parameters are independently debugged respectively, so that the sensor can output good images and can efficiently decode successfully, and two sets of parameters M, N are preset to respectively adapt to paper exposure parameters and screen exposure parameters.
Referring to fig. 4, in the main routine of the present embodiment, necessary initialization is required, and first, the exposure quantity ratio M: and N, initializing a timer and initializing an external interrupt. Since the exposure time is very short, all control is implemented in the interrupt to achieve a real-time state.
In addition, it should be noted that, in order to solve the problems of exposure switching and image sticking, the timer is mainly used to control the on time of the "forged" fill light signal when the paper exposure mode is switched to the screen exposure mode, and the on time of the "forged" fill light signal between the paper exposure modes.
And S12, controlling a light supplement lamp to be opened and closed synchronously along with the opening and closing of a shutter in the paper exposure mode operation, switching the paper exposure mode to the screen exposure mode when the light supplement lamp is closed and the exposure times are more than or equal to M, and controlling the light supplement lamp to be opened.
Referring to fig. 6, in the present embodiment, if the paper shutter is opened, the fill-in signal is turned on, because the paper exposure requires synchronization between the shutter signal and the fill-in signal. If the shutter signal is closed, the light filling lamp signal is closed, meanwhile, the paper exposure counter is added with 1, and then whether the set paper exposure times M are exceeded or not is compared. If the number of the light supplement lamp exceeds the preset value, the screen exposure is switched, and meanwhile, a timer is started to set a light supplement lamp signal about to be forged. If the paper exposure times M are not reached, the push-out continues to wait for the next interrupt response.
And S13, in the screen exposure mode operation, controlling a light supplement lamp to be closed along with the opening of a shutter and a light supplement lamp to be opened along with the closing of the shutter, and switching the screen exposure mode to the paper exposure mode when the light supplement lamp is opened and the exposure times are more than or equal to N.
Referring to fig. 6, in the present embodiment, for the screen exposure, if the screen exposure is turned on. The fill-in light is turned off to stagger the shutter signal and the fill-in light signal. And if the shutter is closed, adding 1 to a screen exposure time counter, and if the set screen exposure times N are exceeded at the moment, configuring a paper exposure mode and waiting for the next shutter response. If the number of the light supplement signals does not reach N times, the screen exposure mode is continued, a timer needs to be started, and the light supplement light signals for balancing human eyes are forged again after t2 time.
In the embodiment of the present invention, it should be noted that, for a general global shutter exposure control, the output signal IO of the shutter sensor directly controls the fill light IO through hardware, as shown in the left side of fig. 3. This has the advantage of simple control, but does not solve the problem of exposing the screen. According to the invention, the CPU is adopted to receive the IO signal of the shutter sensor, and the controller CPU controls the light supplement lamp through an algorithm, such as the right side of the figure 3, so that the light supplement signal can be controlled at will.
It can be understood that, for a general exposure control method, the state of the shutter and the state of the fill-in light are completely consistent, which results in that the longer the exposure time is, the longer the open time of the fill-in light is, if the shutter time is changed, the light and shade of the fill-in light will alternate with each other, and if the shutter time difference is larger, the human eyes will look very uncomfortable. Therefore, the invention can control the signal of the fill-in light, so the states of the shutter and the fill-in light are not completely consistent. In addition, in order to solve the problems of exposure switching and residual image and realize exposure parameter switching, the light supplement lamp can be turned off when a shutter signal is turned on under the condition that exposure and light supplement are required to be staggered, so that the exposure of a screen without residual image is realized. And in order to balance the visual afterimage characteristics of naked eyes, a light supplement signal is forged when the shutter is closed, and the light supplement signal is used for balancing the visual afterimage. Specifically, as shown in fig. 4 and 5, in step S11, after the paper exposure number of the paper exposure mode is set to M and the screen exposure number of the screen exposure mode is set to N, the method further includes:
s21, setting a timer to be started when the paper exposure mode is switched to the screen exposure mode;
s22, initializing the timer and the external interrupt;
s23, enter external interrupt and judge the current exposure mode.
Referring to fig. 6, as a preferred embodiment, in step S12, when the fill light is turned off and the exposure time is greater than or equal to M, the paper exposure mode is switched to the screen exposure mode, and the fill light is controlled to be turned on, specifically:
s121, in the paper exposure mode, when the light supplement lamp is turned off, adding 1 to a paper exposure counter;
s122, judging whether the exposure times are more than or equal to M according to the counting of the paper exposure counter;
s123, if not, continuing to operate the paper exposure mode;
and S124, if yes, switching the paper exposure mode to the screen exposure mode, and simultaneously controlling the light supplement lamp to be turned on.
Preferably, in the step S124, if yes, the paper exposure mode is switched to the screen exposure mode, and the light supplement lamp is controlled to be turned on, specifically:
and if the exposure times are judged to be more than or equal to M according to the counting of the paper exposure counter, starting a timer, and starting the light supplement lamp after the first preset time is reached.
Referring to fig. 6, as a preferred embodiment, in step S13, when the fill light is turned on and the number of exposures is greater than or equal to N, the screen exposure mode is switched to the paper exposure mode, specifically:
s131, in the screen exposure mode, when the light supplement lamp is turned off, adding 1 to a screen exposure counter;
s132, judging whether the exposure times are more than or equal to N according to the counting of the screen exposure counter;
s133, if not, continuing to operate the screen exposure mode;
and S134, if so, switching the screen exposure mode to the paper exposure mode.
Preferably, in step S133, if not, the screen exposure mode continues to be operated, specifically:
and if the exposure times are judged to be less than N according to the counting of the screen exposure counter, starting a timer, and starting the light supplement lamp after a second preset time is reached.
As an example, as shown in fig. 7, in the embodiment of the present invention, M: N of the example of the present invention is 8:3 (paper exposure 8 frames, screen exposure 3 frames, where in order to distinguish between two types, the fill light time in the paper exposure mode is set to 500us, and the "fake" fill light time is 580 when the screen exposure mode is switched to distinguish between two proportions), for example, the priority exposure screen may be set to 2:8 or even to 1:10, and the higher the ratio is, the higher the reading paper quality is (the higher the proportion of one frame) according to actual needs.
In this embodiment, it should be noted that the light source emitted by the supplementary lighting or the LED mentioned in the above method is not limited to the visible light of human eyes, and may also be light in other bands, such as near infrared light, far infrared light, and ultraviolet light. The aim is to make the supplementary lighting partly or completely invisible for human or machine vision.
In summary, the embodiment of the present invention provides an exposure control method, in which a paper exposure number in a paper exposure mode is set to M, and a screen exposure number in a screen exposure mode is set to N; in the operation of the paper exposure mode, a light supplement lamp is controlled to be synchronously opened and closed along with the opening and closing of a shutter, and when the light supplement lamp is closed and the exposure frequency is greater than or equal to M, the paper exposure mode is switched to the screen exposure mode, and the light supplement lamp is controlled to be opened; and in the screen exposure mode, controlling a light supplement lamp to be closed along with the opening of a shutter and the light supplement lamp to be opened along with the closing of the shutter, and switching the screen exposure mode into the paper exposure mode when the light supplement lamp is opened and the exposure times are more than or equal to N. The invention can realize paper exposure reading on one device and simultaneously realize good exposure of the screen. Through the operating condition of control shutter and light filling lamp, when switching paper exposure mode into screen exposure mode, realize the exposure parameter and switch, under the circumstances of "stagger" exposure and light filling for the light filling lamp can be closed when the shutter signal is opened, thereby realizes not having "ghost" screen exposure. Meanwhile, in order to balance the visual ghost characteristic of naked eyes, the light supplement signal is forged when the shutter is closed, namely, the light supplement lamp is controlled to be turned on when the paper exposure mode is switched to the screen exposure mode so as to balance the visual ghost, and therefore the light and shade alternation of the light supplement lamp is avoided.
The invention also provides an exposure control device, which comprises a controller applying the exposure control method, wherein the controller is used for:
setting the paper exposure times of a paper exposure mode as M and the screen exposure times of a screen exposure mode as N; wherein M, N are integers greater than 0;
in the operation of the paper exposure mode, a light supplement lamp is controlled to be synchronously opened and closed along with the opening and closing of a shutter, and when the light supplement lamp is closed and the exposure frequency is greater than or equal to M, the paper exposure mode is switched to the screen exposure mode, and the light supplement lamp is controlled to be opened;
and in the screen exposure mode, controlling a light supplement lamp to be closed along with the opening of a shutter and the light supplement lamp to be opened along with the closing of the shutter, and switching the screen exposure mode into the paper exposure mode when the light supplement lamp is opened and the exposure times are more than or equal to N.
In an embodiment of the present invention, the controller is further configured to:
setting a timer to start a light supplement lamp when the paper exposure mode is switched to the screen exposure mode;
initializing the timer and an external interrupt;
and entering an external interrupt and judging the current exposure mode.
In the paper exposure mode, when the light supplement lamp is turned off, adding 1 to a paper exposure counter;
judging whether the exposure times are greater than or equal to M according to the counting of the paper exposure counter;
if not, continuing to operate the paper exposure mode;
and if so, switching the paper exposure mode into the screen exposure mode, and simultaneously controlling the light supplement lamp to be turned on.
And if the exposure times are judged to be less than N according to the counting of the screen exposure counter, starting a timer, and starting the light supplement lamp after a second preset time is reached.
In the screen exposure mode operation, adding 1 to a screen exposure counter when the light supplement lamp is turned off;
judging whether the exposure times are greater than or equal to N according to the counting of the screen exposure counter;
if not, continuing to operate the screen exposure mode;
and if so, switching the screen exposure mode to the paper exposure mode.
And if the exposure times are judged to be more than or equal to M according to the counting of the paper exposure counter, starting a timer, and starting the light supplement lamp after the first preset time is reached.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. An exposure control method, characterized by comprising at least the steps of:
setting the paper exposure times of a paper exposure mode as M and the screen exposure times of a screen exposure mode as N; wherein M, N are integers greater than 0;
in the operation of the paper exposure mode, a light supplement lamp is controlled to be synchronously opened and closed along with the opening and closing of a shutter, and when the light supplement lamp is closed and the exposure frequency is greater than or equal to M, the paper exposure mode is switched to the screen exposure mode, and the light supplement lamp is controlled to be opened;
and in the screen exposure mode, controlling a light supplement lamp to be closed along with the opening of a shutter and the light supplement lamp to be opened along with the closing of the shutter, and switching the screen exposure mode into the paper exposure mode when the light supplement lamp is opened and the exposure times are more than or equal to N.
2. The exposure control method according to claim 1, wherein when the fill light is turned off and the number of exposures is greater than or equal to M, the paper exposure mode is switched to the screen exposure mode, and the fill light is controlled to be turned on, specifically:
in the paper exposure mode, when the light supplement lamp is turned off, adding 1 to a paper exposure counter;
judging whether the exposure times are greater than or equal to M according to the counting of the paper exposure counter;
if not, continuing to operate the paper exposure mode;
and if so, switching the paper exposure mode into the screen exposure mode, and simultaneously controlling the light supplement lamp to be turned on.
3. The exposure control method according to claim 2, wherein if so, switching the paper exposure mode to the screen exposure mode, and simultaneously controlling the fill light to be turned on, specifically:
and if the exposure times are judged to be more than or equal to M according to the counting of the paper exposure counter, starting a timer, and starting the light supplement lamp after the first preset time is reached.
4. The exposure control method according to claim 1, wherein when the fill light is turned on and the number of exposures is greater than or equal to N, the screen exposure mode is switched to the paper exposure mode, specifically:
in the screen exposure mode operation, adding 1 to a screen exposure counter when the light supplement lamp is turned off;
judging whether the exposure times are greater than or equal to N according to the counting of the screen exposure counter;
if not, continuing to operate the screen exposure mode;
and if so, switching the screen exposure mode to the paper exposure mode.
5. The exposure control method according to claim 4, wherein if not, continuing to operate the screen exposure mode, specifically:
and if the exposure times are judged to be less than N according to the counting of the screen exposure counter, starting a timer, and starting the light supplement lamp after a second preset time is reached.
6. The exposure control method according to claim 1, wherein after the step of setting the paper exposure number of the paper exposure mode to M and the screen exposure number of the screen exposure mode to N, the method further comprises:
setting a timer to start a light supplement lamp when the paper exposure mode is switched to the screen exposure mode;
initializing the timer and an external interrupt;
and entering an external interrupt and judging the current exposure mode.
7. An exposure control apparatus comprising a controller to which the exposure control method according to claim 1 is applied, the controller being configured to:
setting the paper exposure times of a paper exposure mode as M and the screen exposure times of a screen exposure mode as N; wherein M, N are integers greater than 0;
in the operation of the paper exposure mode, a light supplement lamp is controlled to be synchronously opened and closed along with the opening and closing of a shutter, and when the light supplement lamp is closed and the exposure frequency is greater than or equal to M, the paper exposure mode is switched to the screen exposure mode, and the light supplement lamp is controlled to be opened;
and in the screen exposure mode, controlling a light supplement lamp to be closed along with the opening of a shutter and the light supplement lamp to be opened along with the closing of the shutter, and switching the screen exposure mode into the paper exposure mode when the light supplement lamp is opened and the exposure times are more than or equal to N.
8. The exposure control apparatus according to claim 7, wherein the controller is further configured to:
in the paper exposure mode, when the light supplement lamp is turned off, adding 1 to a paper exposure counter;
judging whether the exposure times are greater than or equal to M according to the counting of the paper exposure counter;
if not, continuing to operate the paper exposure mode;
and if so, switching the paper exposure mode into the screen exposure mode, and simultaneously controlling the light supplement lamp to be turned on.
9. The exposure control apparatus according to claim 7, wherein the controller is further configured to:
in the screen exposure mode operation, adding 1 to a screen exposure counter when the light supplement lamp is turned off;
judging whether the exposure times are greater than or equal to N according to the counting of the screen exposure counter;
if not, continuing to operate the screen exposure mode;
and if so, switching the screen exposure mode to the paper exposure mode.
10. The exposure control apparatus according to claim 7, wherein the controller is further configured to:
setting a timer to start a light supplement lamp when the paper exposure mode is switched to the screen exposure mode;
initializing the timer and an external interrupt;
and entering an external interrupt and judging the current exposure mode.
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| CN201910986719.XA CN110677595A (en) | 2019-10-16 | 2019-10-16 | Exposure control method and device |
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| CN201910986719.XA CN110677595A (en) | 2019-10-16 | 2019-10-16 | Exposure control method and device |
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| CN110677595A true CN110677595A (en) | 2020-01-10 |
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| CN201910986719.XA Pending CN110677595A (en) | 2019-10-16 | 2019-10-16 | Exposure control method and device |
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Application publication date: 20200110 |