JPH03152677A - Inter-digital picture data comparing device - Google Patents

Abstract

PURPOSE:To continuously output the necessary results by writing the input data into a picture memory where the reading and writing operations can be carried out at one time and at the same time controlling a comparison arithmetic data memory with the input picture data. CONSTITUTION:One or more sheets of picture memories are provided. The picture element data can be outputted from an optional picture memory, and at the same time the data on an input picture can be written into an optional picture memory. The comparison result picture data is presumed and written previously into a comparison arithmetic table memory TM. Then the lower rank bits A0 - A7 of an address line of the TM are connected to the input picture data with the higher rank bits A8 - AF connected to an output data line of the picture memory. Thus the TM selects the outputs in accordance with the input picture information and the information given from the picture memory. Thus the outputs can be continuously obtained in accordance with the picture information.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a digital image data comparison device that processes image data obtained by converting a video signal into a digital amount using an AD converter or the like.

"Prior Art" A conventional general image processing apparatus is as shown in FIG. In this image processing device, an image to be compared is stored in the image memo 912 image memory ■, outputted from the image memory ■ and the image memory ■, and outputted to an image comparator (CP).
Comparison operations are performed using U). A logic circuit may be used instead of the image comparator.

"Problems to be Solved by the Invention" In the conventional image processing device as described above, while the image memory I and the image memory ■ are output and the image comparator performs calculations, the image memory ■ and the image memory ■ It is not possible to import images to the target, and it is not possible to process continuous images. By increasing the calculation speed of the entire image processing device, it becomes possible to process continuous images, but the image processing device becomes complicated and increases in size and cost.

"Means and Effects for Solving the Problem" In view of the above circumstances, the present invention has been devised to provide a digital digital camera that can increase the calculation speed and process continuous images without increasing the scale of the image processing device. In image processing, it is equipped with an image memory configuration that can read and write image data at the same time, and a table memory for comparison calculations. This is a digital image data comparison device that continuously outputs required result images from a comparison calculation table memory by controlling using stored desired image data and input image data.

"Example" The present invention will be explained in detail based on examples.

As an example of the present invention, 8b of 512 x 512 pixels
FIG. 1 shows a digital image data comparison device for processing IT image data. In the present invention, a look-up table memory is used as an image comparator, and as an initial setting, comparison result image data to be output corresponding to an input image is assumed and written into the table memory. Next, the target comparison result image data is obtained by controlling the address line of the table memory using the two image data to be compared.

The 8-bit image memory with 512 x 512 pixels is configured so that it can be expanded into one image memory or multiple image memories, with memory locations set according to the positions of pixels on the screen. The image memories used for writing and reading are each set independently, and the stored image data corresponding to the pixel position of the image data input from any image memory is output to the table memory for comparison calculations, and at the same time. , input image data can be written to any image memory.

If there is only one image memory, or if the same image memory is used for reading and writing, after reading data corresponding to the pixel position of the input image data, the input data is written to the same position.

Note that the image memory configuration of the present invention includes not only an image memory but also an image memory circuit.

In order to handle 8-bit image data, the table memory for comparison calculation has a total of 1 (lower 8 bits and upper 8 bits).
It has a 6-bit address line, and the lower 8 bits
The address line of is connected to the data line from the input image data, and the address line of upper 8 bits is connected to the output data line of the image memory. From this, the output data of the comparison table memory is selected and output in accordance with the information of the input image and the information from the image memory. Therefore, if the comparison result information is written in the table memory in advance, an output corresponding to the image information can be obtained.

A table look-up memory is a memory used to write a table look-up table in memory and retrieve target data from the data line by controlling the address line of the memory. until now,
Previously, results were calculated using logic circuits, but with recent increases in memory capacity and lower prices, this table-look
Up memory is now used. The circuit configuration can be simplified compared to logic circuits, and RAM can be used as memory.
There is an advantage of having a degree of freedom by using .

The image memory and the table memory for comparison calculations are each connected to the system control bus, and control the reading and writing of the memory, address control of the image memory, writing of input image data to the image memory, prohibition of writing, image memory selection, etc. be done.

"Effect of the invention" The present invention achieves the following effects with the above-described configuration.

First, the position of the dynamic part can be detected by comparing successive images.

Next, the changed position can be detected by comparing the background image and the input image.

In addition, a simple configuration can be achieved by using a memory with a circuit configuration that allows simultaneous reading and writing and a table memory.

Furthermore, since a table memory method is used, necessary calculation results can be set freely, making it highly applicable.

In other words, by first storing image data in the image memory and only reading the image data, differences between images can be detected by comparing the data in the image memory and the input image data, and the results can be output. It will be done.

In addition, by writing the input image data at the same time as reading data from the image memory and updating the data in the image memory sequentially, the data read from the image memory is the image data immediately before the input image data. becomes. Therefore, by performing the comparison, dynamically changing portions of sequentially input images can be detected and a result output can be obtained.

Further, by initializing position-related correction data in the image memory and correction coefficients in the table memory, and only reading from the image memory, input image data is corrected and output. Therefore, it can be used for brightness correction, shading correction, masking, etc.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a digital image comparison device according to a specific embodiment of the present invention, and FIG. 2 is a block diagram of a conventional image processing device. Figure 1 Figure 2 Procedural amendment (method) Detailed explanation of the invention in the specification (no item name stated) 7゜Contents of amendment Between lines 13 and 14 on page 1 of the specification, Add [3. Detailed Description of the Invention]. 1゜Indication of the case 1999 Patent Application No. 291761 2゜Name of the invention Digital image data comparison device 3゜Relationship with the case

Claims (1)

[Claims] (1) In digital image processing, it is equipped with an image memory configuration that can read and write image data at the same time, and a table memory for comparison calculations. A digital image-to-image data comparison device that continuously outputs required result images from a comparison calculation table memory under control using desired image data stored in an image memory and input image data.