CN1750647A - Monitoring system and monitoring method with automatic adjustment function - Google Patents

Abstract

A monitoring system with automatic adjustment function includes a motion detection module and an image processing module. The motion detection module detects real-time video data to determine whether the real-time video data is in a motion state. When the real-time video data is in a motion state, the image processing module writes the real-time video data into a storage medium at a first resolution. When the real-time video data is not in a motion state, the image processing module writes the real-time video data into the storage medium at a second resolution. The first resolution is higher than the second resolution.

Description

Monitoring system and monitoring method with automatic adjustment function

technical field

The invention relates to a monitoring system and a monitoring method, and in particular to a monitoring system and a monitoring method with an automatic adjustment function.

Background technique

In the monitoring system, because the amount of video data is very large, in order to save the space of storage media (such as hard disk or video tape), the technology of motion detection will be used. That is to say, when the monitoring system detects that there is motion on the screen, it starts to write to the storage medium, and the monitoring system at other times only plays the screen and does not perform the storage action. However, this approach ignores the surveillance images before the action or event, especially the video footage during criminal investigation or accidents. If a previous video is missing, quite a few clues may be lost.

If all images are stored for a long time (for example, one month in a row), the above-mentioned problems can be avoided, but the stored video data will be quite large, and most of the video data will not be useful in the future, and only a small part of the data will be useful. use value. Therefore, this method will waste storage media, and will also be inefficient when searching in the future.

Therefore, in order to solve the above problems, there is a great need for a monitoring system and monitoring method with an automatic adjustment function, which can simultaneously save storage media space and record important images.

Contents of the invention

Therefore, the object of the present invention is to provide a monitoring system and monitoring method with automatic adjustment function. When there is no motion on the monitoring screen, the monitoring system can record the screen with a lower resolution. When motion is detected on the monitoring screen (motion), this surveillance system can record pictures with higher resolution.

Another object of the present invention is to provide a monitoring system and monitoring method with automatic adjustment function. When the monitoring picture has no motion (motion), the monitoring system can use a lower frame rate (frame rate) to record the picture. When motion is detected on the monitoring screen, the monitoring system can record the screen at a higher frame rate.

Another object of the present invention is to provide a monitoring system and monitoring method with an automatic adjustment function, which can save storage media space and record important images.

According to the above purpose of the present invention, a monitoring system with automatic adjustment function is proposed. According to a preferred embodiment of the present invention, the monitoring system includes a motion detection module and an image processing module.

The action detection module detects the real-time video data to determine whether the real-time video data is in an action state. When the real-time video data is in the action state, the image processing module writes the real-time video data into the storage medium with the first resolution. When the real-time video data is not in the action state, the image processing module writes the real-time video data into the storage medium with the second resolution. Wherein the first resolution is higher than the second resolution.

According to the purpose of the present invention, a monitoring system with automatic adjustment function is proposed. According to a preferred embodiment of the present invention, the monitoring system includes a motion detection module and an image detection module.

The motion detection module detects the real-time video data to determine whether the real-time recording data is in motion state. When the real-time video data is in an active state, the image processing module writes the real-time video data into the storage medium at a first frame rate. When the real-time video data is not in the action state, the image processing module writes the real-time video data into the storage medium at the second frame rate. Wherein the first frame rate is higher than the second frame rate.

According to another object of the present invention, a monitoring method with automatic adjustment function is proposed. According to a preferred embodiment of the present invention, the monitoring method includes the following steps. Detect real-time video data to determine whether the real-time video data is in an action state. When the real-time video data is in the active state, the real-time video data is written into the storage medium with the first resolution. When the real-time video data is not in the action state, write the real-time video data into the storage medium with the second resolution. Wherein the first resolution is higher than the second resolution.

According to another object of the present invention, a monitoring method with automatic adjustment function is proposed. According to a preferred embodiment of the present invention, the monitoring method includes the following steps. Real-time video data is detected to determine whether the real-time video data is in an action state. When the real-time video data is in the action state, the real-time video data is written into the storage medium at a first frame rate. When the real-time video data is not in the action state, the real-time video data is written into the storage medium at the second frame rate. Wherein the first frame rate is higher than the second frame rate.

The present invention has at least the following advantages, wherein each embodiment may have one or more advantages. In the monitoring system and monitoring method of the present invention, when there is no motion in the monitoring picture, the monitoring system can record the picture with a lower resolution or a lower frame rate (frame rate). , the surveillance system can record pictures with higher resolution or higher frame rate. The monitoring system and monitoring method of the present invention can save storage media space and record important images.

Description of drawings

In order to make the above and other objects, features, advantages and embodiments of the present invention more comprehensible, the detailed description of the accompanying drawings is as follows:

Fig. 1 is the schematic diagram of an embodiment of the present invention;

Fig. 2 is a video recording period diagram of an embodiment of the surveillance system of the present invention;

Fig. 3 is an exemplary flow chart of the monitoring method of the present invention; and

FIG. 4 is an exemplary flow chart of the monitoring method of the present invention.

Description of main component marking

100: Surveillance system 102: Motion detection module

104: Image processing module 106: Real-time video data

107: Lens 108: Storage media

200, 201: Recording mode 202, 204, 206, 208, 210: Time period

Detailed ways

Fig. 1 is a schematic diagram of an embodiment of the present invention. Referring to FIG. 1 , the surveillance system 100 with automatic adjustment function includes a motion detection (motion detection) module 102 and an image processing module 104 . The camera 107 shoots the monitored scene to generate real-time video data 106 . The motion detection (motion detection) module 102 detects the real-time video data 106 to determine whether the real-time video data 106 is in a motion state.

When the real-time video data 106 is in this active state, the image processing module 104 writes the real-time video data 106 into the storage medium 108 with the first resolution. When the real-time video data 106 is not in this active state, the image processing module 104 writes the real-time video data 106 into the storage medium 108 with the second resolution. Wherein the first resolution is higher than the second resolution.

In other words, when doing surveillance video, it is not necessary to use high-resolution full-time video for 24 hours. It is only necessary to use high-resolution video when motion is detected, and use less when no motion is detected. Low-resolution video will do. In this way, the storage media space required for video recording can be saved.

In one embodiment, the image processing module 104 compresses the real-time video data 106 with a first compression rate to obtain a first resolution. The image processing module 104 compresses the real-time video data with a second compression rate to obtain a second resolution, and the first compression rate is lower than the second compression rate.

In other words, when the surveillance system 100 does not detect any motion, the surveillance system 100 compresses the real-time video data 106 with a higher compression rate. When the surveillance system 100 detects motion, the surveillance system 100 compresses the real-time video data 106 with a lower compression ratio. A higher compression rate means lower picture quality, and a lower compression rate means higher picture quality. Therefore the first resolution will be higher than the second resolution. The monitoring system 100 of the present invention can automatically determine the motion and automatically adjust the compression rate, so it has the advantages of saving storage media space and recording the picture of the motion in detail.

In another embodiment, the image processing module 104 compresses the real-time video data 106 with a first frame size to obtain a first resolution. The image processing module 104 compresses the real-time video data 106 with a second frame size to obtain a second resolution. where the first frame size is greater than the second frame size.

For example, when the surveillance system 100 detects no motion, the image processing module 104 performs video recording with a resolution of 352*288, and when the surveillance system 100 detects motion, the image processing module 104 performs video recording with a resolution of 640*480 . Therefore, a clearer image can be recorded when the surveillance system 100 detects motion, and a less clear image can be recorded when no motion is detected, so as to save the space of the storage medium 108 . The storage medium 108 mentioned above is, for example, a hard disk. The monitoring system 100 of the present invention can automatically determine the motion and automatically adjust the frame size, so it has the advantages of saving storage media space and recording the picture of the motion in detail.

In one embodiment, when the real-time video data 106 is in an active state, the image processing module 104 writes the real-time video data 106 into the storage medium 108 at a first frame rate. When the real-time video data 106 is not in an active state, the image processing module 104 writes the real-time video data 106 into the storage medium 108 at the second frame rate. Wherein the first frame rate is higher than the second frame rate.

For example, when the motion detection module 102 detects no motion in the real-time video data 106 , the surveillance system 100 records the real-time video data 106 at a rate of 1 frame per second to save the space of the storage medium 108 . When the motion detection module 102 detects that there is motion in the real-time video data 106, the monitoring system 100 records the real-time video data 106 at a rate of 30 frames per second, so as to record the event in detail. The monitoring system 100 of the present invention can automatically determine the motion and automatically adjust the frame rate, so it has the advantages of saving storage media space and recording the picture of the motion in detail.

Fig. 2 is a video recording period diagram of an embodiment of the monitoring system of the present invention. Referring to FIG. 2 , in the video recording mode 200 , a period 202 represents that the monitoring system 100 has not detected any motion. Surveillance system 100 therefore records period 202 at a lower frame rate, lower resolution, higher compression, or smaller frames. The period 204 represents that the monitoring system 100 detects that there is an action on the screen. Surveillance system 100 therefore records period 204 at a higher frame rate, higher resolution, lower compression, or larger frame.

In the recording mode 201 , the period 202 represents that the monitoring system 100 does not detect any motion. Surveillance system 100 therefore records period 202 at a lower frame rate, lower resolution, higher compression, or smaller frames. Periods 206 , 208 and 210 represent that the monitoring system 100 detects that there is movement on the screen, but the magnitude of the movement is different. Therefore, for the time periods 206 , 208 and 210 , the monitoring system 100 designs different frame rates, resolutions, compression ratios or frame sizes to adapt to different motion ranges. Detecting these different motion ranges and adjusting the picture can be achieved by hardware or software.

The invention also provides a monitoring method with automatic adjustment function. FIG. 3 is an exemplary flow chart of the monitoring method of the present invention. Referring to Fig. 3, the monitoring method includes the following steps. Detect real-time video data to determine whether the real-time video data is in an active state (step 302). When the real-time video data is in an active state, write the real-time video data into a storage medium with a first resolution (step 304). When the real-time video data is not active, write the real-time video data into the storage medium with the second resolution (step 306). The video recording process is constantly repeated for motion detection. Wherein the first resolution is higher than the second resolution.

The invention also provides another monitoring method with automatic adjustment function. FIG. 4 is an exemplary flow chart of the monitoring method of the present invention. Referring to Fig. 4, the monitoring method includes the following steps. Detect real-time video data to determine whether the real-time video data is in an active state (step 402). When the real-time video data is in an active state, write the real-time video data into the storage medium at a first frame rate (step 404). When the real-time video data is not in the active state, write the real-time video data into the storage medium at the second frame rate (step 406 ). Wherein the first frame rate is higher than the second frame rate. Fig. 3 and Fig. 4 are the same as the embodiment described in Fig. 1 and Fig. 2, so details are not repeated here.

The present invention has at least the following advantages, wherein each embodiment may have one or more advantages. In the monitoring system and monitoring method of the present invention, when there is no motion in the monitoring picture, the monitoring system can record the picture with a lower resolution or a lower frame rate (frame rate). , the surveillance system can record pictures with higher resolution or higher frame rate. The monitoring system and monitoring method of the present invention can save storage media space and record important images.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make various modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the claims.

Claims (10)

1. A monitoring system with automatic adjustment function, characterized by at least including: A motion detection (motion detection) module is used to detect real-time video data to determine whether the real-time video data is in motion; and An image processing module, when the real-time video data is in the action state, the image processing module writes the real-time video data into the storage medium with a first resolution, and when the real-time video data is not in the action state, the image processing module The real-time video data is written to the storage medium at a second resolution, wherein the first resolution is higher than the second resolution. 2. The monitoring system according to claim 1, wherein the image processing module compresses the real-time video data with a first compression rate to obtain the first resolution, and the image processing module compresses the real-time video with a second compression rate data to obtain the second resolution, and the first compression ratio is lower than the second compression ratio. 3. The surveillance system according to claim 1, wherein the image processing module compresses the real-time video data with a first frame size to obtain the first resolution, and the image processing module compresses the real-time video data with a second frame size The real-time video data is compressed to obtain the second resolution, and the first frame size is larger than the second frame size. 4. The monitoring system according to claim 1, wherein the storage medium comprises a hard disk. 5. A monitoring system with automatic adjustment function, characterized by at least including: A motion detection (motion detection) module is used to detect real-time video data to determine whether the real-time video data is in motion; and Image processing module, when the real-time video data is in the action state, the image processing module writes the real-time video data into the storage medium with the first frame rate (frame rate), when the real-time video data is not in the action state, The image processing module writes the real-time video data into the storage medium at a second frame rate, wherein the first frame rate is higher than the second frame rate. 6. A monitoring method with an automatic adjustment function, characterized in that it includes at least: Detecting real-time video data to determine whether the real-time video data is in an action state; When the real-time video data is in the action state, write the real-time video data into a storage medium with a first resolution; and When the real-time video data is not in the action state, write the real-time video data into the storage medium with a second resolution; Wherein the first resolution is higher than the second resolution. 7. The monitoring method according to claim 6, wherein the step of writing the real-time video data into the storage medium with the first resolution and the second resolution comprises: compressing the real-time video data with a first compression rate to obtain the first resolution; and compressing the real-time video data with a second compression rate to obtain the second resolution; Wherein the first compression ratio is lower than the second compression ratio. 8. The monitoring method according to claim 6, wherein the step of writing the real-time video data into the storage medium with the first resolution and the second resolution comprises: Compressing the real-time video data with a first frame size (frame size) to obtain the first resolution; and compressing the real-time video data with a second frame size to obtain the second resolution; Wherein the first frame size is larger than the second frame size. 9. The monitoring method according to claim 6, wherein the storage medium comprises a hard disk. 10. A monitoring method with automatic adjustment function, characterized by at least including: Detecting real-time video data to determine whether the real-time video data is in an action state; When the real-time video data is in the action state, write the real-time video data into the storage medium with a first frame rate; and When the real-time video data is not in the action state, write the real-time video data into the storage medium at a second frame rate; Wherein the first frame rate is higher than the second frame rate.

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