JPH04205476A - Image processing system and its device - Google Patents

Abstract

PURPOSE:To make it possible to superpose two received image data on an optional position even when their size is not the same by sending the limited part of the 1st image data stored in an image data storing means to a superposing means and superposing the sent part to the 2nd input image data. CONSTITUTION:In the case of storing the 2nd image data in a memory 15, the logic of a terminal 43 is set up to '1' and memory image data applied from a terminal 42 are allowed to flow and superposed to the other image data and the superposed image data are stored again in the memory 15. The image data stored in the memory 15 are outputted to a selector circuit 16 and partial image data read out from the 1st image data are sent to a superposing processing circuit 14 by a control instruction outputted from a CPU 19. Synthetic image data consisting of a part of the 1st image data and the 2nd image data are outputted from an output buffer 17 to an output terminal 22. Thereby only an optional position of two image data to be originally synthesized in a computer can rapidly be superposed by receiving the XY axis information of the superposing position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of superimposing and outputting one image data and an apparatus therefor.

[Prior Art] As a conventional screen processing method of this type, image data from an external device is input to a superimposing means, and when the input image data is the first input data, the data is superimposed. If the input image data is the second input image data, the image data stored in the memory for the first time is selectively sent back to the superimposing means to generate the second input image data. There is an image processing method (Japanese Patent Application No. 2-47046) in which the superimposed image data is stored in the memory, and the stored superimposed image data is outputted to the outside of the apparatus as composite image data.

[Problems to be Solved by the Invention] The image processing method described above has the advantage that the processing time is shorter than the previous combination image synthesis method, but the two received image data to be synthesized are the same. limited to dimensions.

Therefore, there is a drawback that the second received image data cannot be superimposed on any arbitrary position of the first received image data.

Therefore, according to the present invention, the time required to synthesize one image is short.

Moreover, it is an object of the present invention to provide an image processing method and an apparatus therefor that can superimpose two pieces of received image data to be combined at an arbitrary position even if they do not have the same size.

[Means for Solving the Problems] According to the present invention, serial and parallel image data from an external device is input to the superimposing means, and when the input image data is the first input image data, the data is The stored image data is stored in the image data storage means without being overlaid, and the stored image data is selectively sent back to the overlay means, and the overlay means overlaps the second input image data. In an image processing method in which image data is stored in the image data storage means and the stored superimposed image data is outputted to the outside of the apparatus as composite image data, the image data storage means is provided with a limited amount of the first image data. the limited portion of the first image data stored in the image data storage means is sent to the superimposing means to be superimposed on the second human image data; An image processing method characterized by the following can be obtained.

Further, according to the present invention, the XY axis information is information giving the first address of the first line and the last address of the last line of the image data to be superimposed, and from this information, the amount of data for one line can be calculated. An image processing method according to claim (1) is obtained, characterized in that signals are provided as many times as there are lines.

Further, according to the present invention, input data receiving means receives image data from an external device and XY axis information for indicating the position of the screen, and the received image data.

If this image data is the first image, output it as is.

At the time of the second image, there is an overlapping processing means for superimposing and outputting separately received partial image data, an image data storage means for storing the outputted image data, and the first image data stored in this image data storage means. a select circuit that receives image data of a limited portion determined by the XY axis information of the input circuit and sends it to the overlay processing circuit as the partial image data, and receives the stored overlay image data and sends it out as device output; 1 line data amount for receiving XY axis information from the output data receiving means and determining image data of a limited portion of the first image data stored in the image data storage means based on the XY axis information; There is obtained an image processing apparatus characterized in that it is provided with a control means for providing a control signal including the above-mentioned superposition processing circuit and the selection circuit.

[Example] FIG. 1 is a block diagram showing an embodiment of a single device.

First, to explain the overall operation, serial image data is input from the input terminal 11, XY axis information for indicating the position of the drawing is input from the input terminal 12, and the input image data is sent to the input buffer 13. The signal is input to the superposition circuit 14 via the signal line.

If this input image data is the first one, it is set so that no image data is input to the other input of the 1 superposition circuit 14, and the input data is stored in the memory 1 as it is.
5 is written. When input image data is input for the second time, the image data of a portion selected based on the XY axis information of the first image sent earlier is sent to the other input via the selection circuit 16, as will be described later. The two images are superimposed and written into the memory 15. The superimposed images are sent to an output terminal 18 via a selection circuit 16 and an output sofa 17.

The CPU 19 receives XY axis information from the input buffer 13 and outputs a signal for controlling the memory 15 through a write counter 20 . It controls the read counter 21° and the 1-line data amount generation circuit 22.

It also controls the overlap control circuit 14 and the selection circuit 16.

Next, the operation in each circuit will be explained.

The overlapping processing circuit 14 receives external image data from one terminal 41 and receives image data from the memory 15 from the other terminal 42. When storing the image data of the first concave in the memory 15, the logic of the terminal 43 is set to 0, image data from the memory from the terminal 42 is stopped, and the image data is stored in the memory 15 as it is. Next, when storing the second image data in the memory 15, the logic at the terminal 43 is set to 1, and the image data from the memory is sent from the terminal 42, superimposed, and stored in the memory 15 again.

Next, the image data stored in the memory 15 is output to the select circuit 31, and the image data stored in the memory 15 is
A part of the image data read out from the first image data is sent to the overlapping processing circuit 14, and composite image data of a part of the first image data and the second image data is sent from the output buffer 17 to the output terminal 18. Output.

The timing signals necessary for the memory 15 are generated by the two oscillators 23 operating the counter 24 and the ROM 25. Also, the read address and write address are
The necessary start address is set by the CPU 19 and the operation is started. The overlapped 0N10FF signal required by the overlap processing circuit is output to the terminal 43 of the overlap processing circuit.

Here, the one-overlapping process will be explained. When reading data from the memory 19, it is possible to overwrite only an arbitrary location within one screen by specifying the read address using the following procedure.

First, the XY axis information of the location to be overlapped on one screen is received from the input buffer 713. In this case, the XY axis information is the upper left point (
There are two points: X+,)'+) and the lower right point (x-, yn). By specifying these two points, the amount of data for one line and the number of lines are determined.

Next, based on the information, set the address corresponding to the upper left point (x+, y+) of the image data to be superimposed on the read counter 21, and set the address corresponding to the upper left point (x+, y+) of the image data to be superimposed on the 1-line data amount generation circuit 22. Set the amount of data for one line (Xゎ-X+). The shaded area in the figure indicates the overlapping range.

Reading is started in this state, and one line of image data is read out from the address set in the read counter 21 in response to the gate signal for the data amount for one line generated by the one line data amount generation circuit 22. When data for one line is read out, an interrupt signal is received from the one-line data amount generation circuit 22, and the read counter 21 sets the reading start point (x+ + y2) of the first line.
Reset to . Repeat this until the starting point is (X+ +
A predetermined overlapping process is performed until ym ).

Note that when the overlapping part is not a single rectangle.

For example, if the shape is convex, it is divided into a small rectangle at the top and a large rectangle at the bottom, and two types of XY axis information are successively provided.

[Configuration of the Invention As explained above, the present invention is capable of superimposing only a certain arbitrary location at high speed by receiving XY axis information of the location where two pieces of image data, which are originally synthesized on a computer, are to be superimposed. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a diagram showing an example of the state of the memory when overlapping is performed. Explanation of symbols: 13...Input buffer, 14...Overlap processing circuit, 15...Memory, 16...Select circuit. 17...Output buffer, 19...CPU, 20...
・Write counter, 21...Read counter, 22・
... 1 line data amount generation circuit, 23 ... oscillator, 2
4...F1

Claims (3)

[Claims] (1) Serial image data from an external device is input to the superimposition means, and if the input image data is the first input image data, it is stored in the image data storage means without being superimposed on the image data. , selectively sending at least a portion of the stored image data back to the superimposing means;
Image processing in which the superimposing means superimposes the second input image data, stores the superimposed image data in the image data storage means, and outputs the stored superimposed image data to the outside of the device as composite image data. In the method, XY-axis information that determines a range of a limited portion of the first image data is provided to the image data storage means, and the limited portion of the first image data stored in the image data storage means is The image processing method is characterized in that the image data is sent to the superimposing means and superimposed on the second input image data. (2) The XY axis information is information that gives the first address of the first line and the last address of the last line of the image data to be superimposed, and from this information, a signal with the amount of data for one line is generated for the line. The image processing method according to claim (1), characterized in that only numbers are given. (3) Input data receiving means for receiving image data from an external device and XY axis information for indicating the position of the screen, and outputting the received image data as is when it is the first image data, and outputting the received image data as it is for two images. In this case, there is an overlapping processing means for superimposing and outputting separately received partial image data, an image data storage means for storing the outputted image data, and an image data storing means for storing the first image data stored in this image data storage means. A select circuit that receives image data of a limited portion determined by XY axis information and sends it to the overlapping processing circuit as the partial image data, and receives the stored overlapping image data and sends it out as device output; and the input/output data. Receiving XY axis information from the receiving means, the image data storage means includes one line data amount for determining image data of a limited portion of the first image data stored based on the XY axis information. An image processing apparatus comprising: control means for providing a control signal and also for providing a control signal to the overlapping processing circuit and the selection circuit.