JPS63682A - Image processor - Google Patents

Abstract

PURPOSE:To shorten the list preparing time by executing a list preparation for reading a data, in a real time in the course of inputting an image data. CONSTITUTION:By a signal delaying a horizontal base line by a delaying circuit 9, a counter 6, and a counter 10 for showing the present line number of a screen are latched to a register 11 and a register 12, respectively. To these two registers, values of the respective counters are latched only once in one horizontal period, and become the present line number of the screen of its contents and an address for writing the next data. To a CPU, an interruption is applied by a horizontal base line in the course of inputting an image, and the CPU reads the contents of the register 11 and the register 12 in the course of the interruption processing, writes the contents of the register 11 in an address corresponding to the line number, and prepares the list in a real time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image processing device that can input high-resolution images at high speed.

[Prior art and its problems]

In conventional image processing methods, image data is obtained using an interlace method or a method in which an image is taken from the middle of the screen, so the data for each line is not arranged sequentially from the top line as shown in FIG.

Therefore, in order to retrieve the processed data from the top line during image processing, after importing the image data, a list is created in which the first storage address of the data for each line is arranged in the order of the line, and based on that list, Data is being captured and processed.

The list in this case is shown in FIG.

However, this method has the disadvantage that as the amount of data increases, it takes a lot of time to create the list, which increases the overall time to process the images.
This has become a major bottleneck.

Therefore, the present invention provides a method for creating a list for data import in real time while image data is being imported, thereby achieving faster image processing than conventional methods.

[Means for solving problems]

In order to solve the above problems, the present invention provides a line counter that represents the line number of the screen, and interrupts each horizontal baseline so that the central processing unit (hereinafter referred to as CPU) can read the line counter and the data of that line at the time of the interrupt. A list is created in real time by reading the value of the register that latches the first address to store the line number, and writing the register value (that is, the storage address) to the memory at the address corresponding to the line number.

〔Example〕

FIG. 3 shows an embodiment of the present invention, in which the differential detection circuit 1
．． Control circuit 2. Column counter 3. Status register 4. Memory 5. A conventional circuit consisting of a counter 6 and a register 7.8 has a delay circuit 9. Counter 10 and register 11
．． 12 is added.

Binary image data to be processed is manually input to a differential detection circuit 1 that detects points of change from black to white and from white to black.

Here, a change point is detected and the signal thereof is output to the control circuit 2. The control circuit 2 uses a counter 3 that indicates the position of this change point on the line (this counter is counted and amplified using the pixel clock, and is cleared at the horizontal baseline) in order to write the value of the status register 4 to the memory 5. , counts up a counter 6 indicating the write address of the memory 5, latches the value of the counter 6 to the register 7, and gives the address of the memory 5.

The values of counter 3 and status register 4 are launched into register 8, input to the data bus of memory 5, and written into memory 4. A write signal and a chip select signal for the memory 5 are outputted by the control circuit 2.

The same thing happens when a status signal indicating the end of a line or field is manually input to the control circuit 2. However, the value of the counter 3 at this time has no meaning, but the value of the status register 4 has meaning.

Further, a signal obtained by delaying the horizontal baseline by a delay circuit 9 is used to input a counter 6 and a counter 10 representing the current line number of the screen.
Register 11. Search register 12.

These two registers have addresses that are read once in one horizontal period.

The CPU is interrupted at the horizontal baseline while the image is being captured, and the CPU registers register 1 during the interrupt processing.
1 and the contents of register 12 are read, and the contents of register 11 are written to the address corresponding to the line number, thereby creating a list in real time.

FIG. 4 is a flowchart showing the interrupt processing routine in this case.

When the data has been taken in, the CPU refers to the list mentioned above and reads the data from the top line and performs processing.

〔Effect of the invention〕

In the conventional image processing method, as mentioned above, a list for reading the data was created after the image data was imported, so it took time to create the list depending on the amount of data, but in the present invention, Since list creation for data reading is done in real time while image data is being imported, the time required to create the list can be saved and the overall image processing can be shortened. 9 to 12) This is a practically excellent invention that can realize this.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the contents of data for each line in a conventional device, FIG. 2 is a diagram showing a list when the data shown in FIG. 1 is arranged in line order, and FIG. 3 is an embodiment of the present invention. FIG. 4 is a flowchart showing the interrupt processing routine. 1... Differential detection circuit 2... Control circuit 3... Column counter 4... Status register 5... Memory 6... Counter 7... Register 8... Register 9... Delay Circuit 10... Counter 11... Register 12... Register Figure 2

Claims (1)

[Claims] In an image processing device that is equipped with a central processing unit, scans the screen in an interlaced manner, and performs shape recognition using the data for each horizontal line of a binary image, the data for each horizontal line of the binary image is input, and the data for each horizontal line of the binary image is input. A circuit that writes into memory the position of the black-to-white and white-to-black transition points on the line and status data of the end of the line or field, a line counter that indicates the current line number on the screen, and a horizontal baseline. The counter includes a register that latches the value of the counter representing the address of the data to be written next, and the central processing unit is interrupted at a horizontal baseline while image data is being taken in, and the central processing unit latches the value of the counter indicative of the address of the next data to be written. An image processing device characterized in that it reads the value of and writes an address where the next data will be written to an address corresponding to the line number to create a list for reading data in image processing.