JP2638003B2 - Image processing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus that performs image processing on a video signal obtained from a camera.

2. Description of the Related Art A conventional image processing apparatus has a structure as shown in FIG.

That is, the video signal input from the camera 17 is binarized by the camera control means 18 and is converted into a signal inversion detection means.
Entered in 20. Further, the camera control means 18 generates a synchronization signal and sends it to the address generation means 19. The address generation means 19 converts the position information of the video signal binarized in synchronization with the synchronization signal into start / end address detection means 21, end code generation means 22, memory write timing control means 23, address bus control means 25. Send to The signal inversion detecting means 20
It detects the inversion of the input video signal and sends the information to the start point / end point address detection means 21. The start point / end point address detection means 21 detects a position where the video signal is inverted from the input information, and sets the position where the inversion has started as a start point address and the position where the video signal is returned as an end point address as a data bus control means 24. , The position information is stored in the memory 26. The end code generating means 22 detects the end of the line from the information obtained from the address generating means 19, and stores an end code indicating the end of the data on the line in the memory via the data bus control means 24. .

However, in the above-described configuration, in order to easily find the position of the target pattern, a run of a specific length on a horizontal line is extracted as shown in FIG. After performing the image compression process 27 using the processing device, the feature extraction process 28 that extracts runs of a specific length using the result is performed, so that the process is performed serially and the processing time is long. Had.

Means for Solving the Problems In order to solve the above problems, the image processing apparatus of the present invention detects only the start point and the end point of a run in a predetermined length range, and stores the positions in a memory. Means for counting the number of runs in a predetermined length range on the line, detecting the end of the line, and storing the number of runs as a line end information at a specific address of a memory. Things.

According to the present invention, the image compression processing and the feature extraction processing for extracting a run of a specific length are performed simultaneously in parallel.

Embodiment Hereinafter, an image processing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an image processing apparatus according to one embodiment of the present invention. In FIG. 1, a video signal input from a camera 1 is binarized by a camera control means 2,
The signal is input to the signal inversion detecting means 3. Further, the camera control means 2 generates a synchronization signal and sends it to the address generation means 4. The address generation means 4 converts the position information of the video signal binarized in synchronization with the synchronization signal into the countermeasure range determination means 6, the start / end address detection means 8, the memory write timing control means 10, the address bus control means 12, Send to The signal inversion detection means 3 detects the inversion of the input video signal,
The information is sent to the effective run length determination means 5. The effective run length determining means 5 determines whether or not the run length is within a predetermined range based on the input information, and sends the result to the effective run data acquisition signal generating means 7. The search range determining means 6 determines from the input position information whether the detected run is within an area to be searched on the screen, and uses the result as a valid run data capture signal generating means 7.
Send to Only when the run satisfies the length specified in advance from the input information and is within the area to be searched on the screen, the valid run data fetch signal generation means 7 executes the start / end address detection means 8 A detection signal is sent to the number detecting means 9. The start point / end point address detecting means 8 detects the positions of the start point and the end point of the run from the input detection signal, and stores the position information in the memory 13 via the data bus control means 11. The run number detection means 9 calculates
The number of runs on the line is counted, and data bus control means 1
1. The end of the line is detected via the address control means 12, and the number of runs on the line is stored at a specific address in the memory 13.

The operation of the image processing apparatus configured as described above will be described below with reference to FIGS. 5, 6, and 7.

FIG. 5 is an example of a binarized image signal, FIG. 6 is image compression data created by a conventional image processing apparatus, FIG.
The figure shows the compressed image data created by the present embodiment.

In the conventional image processing apparatus, when an image as shown in FIG. 5 is input, a start point address and an end point address of a run are alternately stored for each horizontal line as shown in FIG. When the run is no longer on the line, an end code indicating that there is no run on the line is stored in the adjacent address. On the other hand, according to the present embodiment, the fifth
When an image as shown in the figure is input, as shown in FIG. 7, a pattern with a long run length or a pattern with a short run length depends on the range of the length specified in advance from the compressed data. At the same time, only the start and end addresses of the runs satisfying the previously specified run length are stored alternately, and at the same time, the run length storage memory area stores the specified length as the end information of the data on the line. Can be stored.

Therefore, when a run of a specific length is extracted in order to find the position of the target pattern, as shown in FIG. 2, an image compression process 14 for compressing an image signal into run position information and a run of a specific length The feature extraction processing 15 to be extracted is performed in parallel, and only the determination processing 16 needs to be performed subsequently for serial processing, and the processing time is shortened.

Effect of the Invention As described above, the present invention detects a start point and an end point of only a run of a predetermined length range, stores the positions in a memory, and stores the position in a line of a predetermined length range on a line. Means for counting the number of runs, detecting the end of the line, and storing the number of runs at a specific address in a memory as end information of the line, thereby compressing the image signal into position information of the run. The process and the feature extraction process for extracting a run of a specific length can be performed in parallel, and the entire processing time for searching for the position of the target pattern can be reduced.

Also, by storing the number of runs on a line as the end information, the amount of information included in the compressed data can be increased, and the search time by the program can be reduced by writing the number of runs to a specific address. be able to.

[Brief description of the drawings]

FIG. 1 is a block diagram of an image processing apparatus according to one embodiment of the present invention, FIG. 2 is a processing flowchart of position recognition using the present invention,
FIG. 3 is a block diagram of a conventional image processing apparatus, FIG. 4 is a processing flowchart of position recognition using the conventional image processing apparatus, and FIG. 5 is an example of a binarized image signal showing the effect of the present invention. FIG. 6 is a diagram showing an example of compressed image data created by a conventional image processing apparatus, and FIG. 7 is a diagram showing an example of compressed image data created by an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Camera 2 ... Camera control means 3 ... Signal inversion detection means 4 ... Address generation means 5 ... Effective run length determination means 6 ... Search range determination means 7 ... Effective run data Acquisition signal generation means, 8 ... Start point / end point address detection means, 9 ... Run number detection means, 10 ... Memory write timing control means, 11 ... Data bus control means, 12
... address bus control means, 13 ... memory.

Claims (1)

(57) [Claims] 1. A means for detecting inversion of a signal from a binarized video signal, a means for storing a start point and an end point of a run from a reversed position in a memory for detecting a start point and an end point of a run, and detecting an end of a line. Means for storing an end code indicating the end of the data on the line in a memory, detecting only a start point and an end point of a run of a predetermined length range, and storing the position in a memory. Means for storing in
Means for counting the number of runs of a predetermined length range on the line, detecting the end of the line, and storing the number of runs as a line end information at a specific address in a memory. Image processing apparatus.