JPS6130890A - Correcting device of window data - Google Patents

Abstract

PURPOSE:To facilitate the correction of window data by displaying a set window area on a display device and displacing in parallel, rotating, enlarging and reducing said area. CONSTITUTION:A window area 2 shown by window data stored in a window data setting memory 1 is displayed on a display device 3. Then, when a cursor shifting key 5 is operated, a cursor 6 is moved in the area 2. Next, instructions such as the parallel displacement, rotation, enlargement and reduction are inputted through a command data input means 8. A window area correction means 9 corrects the window data in the window data setting memory 1, which is specified by the cursor 6.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a window data modification device for masking unnecessary parts within the field of view in a visual sensor.

2. Description of the Related Art Conventionally, images have been automatically processed for purposes such as inspecting parts for defects. For example, after capturing an image of an article being conveyed on a belt conveyor, quantizing it, performing pre-processing such as thinning, and further processing such as contour extraction and feature extraction, the presence or absence of defects can be determined by comparing it with reference data. There is something to judge. In such a system, in order to remove parts unnecessary or inconvenient for image processing from the image captured by the visual sensor, the image data is logically ANDed between the window data read from the window data setting memory and the imaging signal. Often, only images within the window area are processed.

Conventionally, setting window data involves displaying a quantized image of a standard item on a CRT, specifying the end point of the window area to be set with a cursor, and setting the area corresponding to the specified point. For example, you can store "1" in the window data setting memory area, or place a pattern in which the window area is filled in white and other areas in black within the field of view of the imaging device, and convert this imaging signal into a binary value. This is done by writing the converted signal into the window data setting memory.

By the way, if you want to modify window data after setting it using the method described above, conventionally the only way to do so is to repeat the setting operation as described above, which makes it easy to modify the window data. The problem was that I couldn't get it.

Problems to be Solved by the Invention The present invention solves these conventional problems, and its purpose is to enable window data once set to be modified with a simple operation.

Means for Solving the Problems The present invention solves the above problems by performing a logical product between the window data read from the window data setting memory 1 and the imaging signal, as shown in FIG. A window area display hand 'Bt4 for graphically displaying a window area 2 indicated by window data stored in the window data setting memory 1 on a display device 3, and a cursor movement key 5 are provided on a visual sensor that obtains a window-processed image signal. , a cursor display means 7 for displaying a cursor 6 at a display position on the display device 3 according to the operation of the cursor movement key 5; A command data input means 8 and a window data modification means 9 for modifying the window data in the window data setting memory 1 indicated by the cursor 6 in accordance with the command data inputted by the command data input means 8 are provided.

When modifying the window data that has an effect, display the window area 2 indicated by the window data stored in the window data setting memory 1 on the display device 3, and move the cursor 6 into that window area by operating the cursor movement key 5. let When, for example, a command to enlarge is inputted from the command data input means 8, the window area correction means 9 enlarges the window data in the window data setting memory 1 indicated by the cursor 6 accordingly. Similarly, window data is corrected by inputting a parallel movement command, one rotation command, and a reduction command.

Embodiment FIG. 2 is a block diagram of main parts of a visual sensor processing system having a window data correction device of the present invention, in which 11 is an imaging device such as an ITV, and 12 is an A/D converter that converts an imaging signal into a digital value. , 13 compares the output of the A/D converter 12 with the reference value and becomes "1".

A binarization circuit 14 generates a 2'-valued imaging signal represented by "θ", and a binarization circuit 14 outputs the output of the binarization circuit 13 to a serial-parallel converter 15 or an AND circuit 16 depending on the level of a switching signal 5ELI. Input switching circuit, 17 is switching signal 5EL2
a switching circuit 19 for selecting the output of the serial-parallel converter 15 or the data from the data bus 18 according to the level of the data bus;
2 is a frame memory for setting window data to which the output of the switching circuit 17 is applied to a data input terminal; 20 is a frame memory for storing a window-processed image signal; both frame memories have the same address space. 21 is an address generation circuit that generates the vertical synchronization signal and horizontal synchronization signal of the imaging device 10 and the addresses of the frame memos 1J19 and 20; 22 is an address generation circuit that generates the output address of the address generation circuit 21 or the output address of the address bus according to the level of the switching signal 5BL3; Switching circuit for outputting addresses to frame memories 19 and 20, 2
4 is a switching circuit (m) that sends the output of the frame memory 19 to the parallel-to-serial converter 5 or the input cover/7-fur circuit 26 according to the level of No. S[!L4; r is the output of the parallel-to-serial converter; The serial-to-parallel converter to which the output of the AND circuit 16 is added, which performs logical product with the output of the switching circuit 14, stores the output data of the serial-to-parallel converter or the data of the data bus 18 in the frame memory according to the level of the switching signal 5EL5. Nod is a switching circuit added to the data input terminal, 4 is an input buffer circuit to which the output data of the frame memory is added, chrysanthemum is a data bus 18.Address bus order,
cp connected to peripheral circuits by control bus 31
u, 32 is a switching signal generation circuit that generates switching signals 5HLI to 5EL5; 33 is a ROM that stores programs, etc.;
34 is a RAM used for calculations, 35 is a keyboard having multiple keys such as numeric keys, alphabet keys, cursor movement keys, etc., A is a CRT controller, and Xun is a CR.
T, wing is an address decoder that generates a selection signal when the CPU 30 accesses a peripheral circuit, and O is an activation signal exchanged between the CPU 30 and the address generation circuit 21.
This is a buffer 1 circuit for the write end signal.In addition, a write/read selection signal W/R is added to the frame memory 19° from the control bus 31.

The operation of this system can be roughly divided into the following four types.

■Window data modification operation ■Window processing operation of imaging signal ■Analysis processing of window-processed imaging signal The present invention relates to the improvement of the above item (2), but in order to facilitate understanding of the present invention, the operations will be sequentially explained below. Explain.

■Window data setting process When setting window data in the frame memory 19, first, as shown in FIG. The window areas 50 to 52 are arranged so as to be located at desired locations within the field of view of the imaging device 11.

Then, a window data setting command is input from the keyboard 35. When the CPU 30 receives this command,
After switching the output of the switching circuit 14 and the input of the switching circuit 17 to the serial-parallel converter 15 side, and switching the input of the switching circuit 22 to the address generation circuit 21 side, and sending the write signal W to the frame memory I9, a start signal is sent. is sent to the address generation circuit 21. As a result, the address generation circuit 21 sequentially generates addresses from the first address to the last address of the frame memo January 9 in synchronization with the synchronization signal sent to the imaging device 11. The image signal of the pattern edict is converted into a digital quantity by the A/D converter 12, and a z-valued image signal in which the window areas 50 to 52 are "1" and the background is "0" is generated by the binarization circuit 13. , this is inputted to the serial to parallel converter 15 via the switching circuit 14, where it is converted into 8-bit parallel data, and then inputted via the switching circuit 17 to the data terminal of the frame memory sum. Then, this data is sequentially stored in the addresses generated by the address generation circuit 21. When the address generation circuit 21 finishes sequentially generating addresses from the first address to the last address of the frame memory block, it sends an image capture end signal to the CPU 30, and upon recognition of this, the
The PU 30 notifies the operator of the completion of setting the window data by lighting a lamp or the like (not shown).

Note that it is also possible to set the window data using a method different from that described above.

- Window data modification operation To modify the window data once set in the frame memo January 9 by the operation described above, first manually input a command from the keyboard to display the contents of the frame memory on the screen of the CRT 37. When this command is input, the CPU 30 switches the input of the switching circuit 22 to the address bus side and the CPU of the switching circuit U to the data bus 18 side, and sends a read signal R to the frame memory 19 to read the frame memory. An address for not reading out the contents of frame memory 19 is input to frame memory 19 via switching circuit 22. Then, the contents of the input cover circuit are read and sequentially sent to the CRT controller. This operation causes the CRT37
For example, as shown in FIG. 4, window areas 50 to 52 indicated by the window data stored in the frame memory block are graphically displayed on the screen.

Next, the operator corrects the window area while looking at this display, and uses the keyboard to specify which window area among the window areas 50 to 52 stored in the frame memory 19 is to be corrected. Operate the cursor movement key to move the cursor within the window area to be modified as shown in FIG.

Note that the cursor ω is displayed when the CPU sends a signal to display the cursor at a display position corresponding to the value of an internal counter that is incremented by pressing down a cursor movement key.
This is done by sending the data from 30 to CRT controller A.

There are four modes of correction: parallel translation (9 rotations) and enlargement (9 reduction), which can be freely selected depending on the content of the correction. Commands in each mode use, for example, the following format.

Parallel movement MOV X..., Y...rotation
ROT... Expansion, reduction MUL... Here, This is a code that specifies whether to move it, and R
OT... is a code that specifies how many times to rotate the window area to the right around the center of gravity.
... is a code that specifies how many times the window area should be enlarged or reduced. By entering such a command,
You can modify the window area specified with the cursor.

FIG. 5 is a flowchart showing an example of the processing of the CPU 30 when the above command is input. When the above command is input from the keyboard, the CPU determines whether the command is a parallel movement command, a nine rotation command, or an enlargement or reduction command, and if it is a parallel movement command, the window area in the frame memory river indicated by the cursor is Translates the memory location by the commanded translation amount, and in the case of a rotation command, similarly moves the memory location of the window area indicated by the cursor to a location rotated by the commanded rotation angle, and enlarges or reduces it. In the case of a command, the memory location of the window area designated by the cursor is enlarged according to the commanded magnification. In this way, the operation sequentially reads the contents of the frame memory 19, identifies the original storage location of the window data group specified by the cursor, and calculates the corrected amount based on the storage location and the specified parallel movement amount, 2 rotations, and 9 magnifications. The switching circuit 17 is switched to the data bus 18 side, and data "1" is sequentially stored in the memory location found above, and the original window data is replaced with "1". ” to “0”.

Furthermore, when modifying other window data stored in the frame memory 19, the same operations as described above are repeated.

■Window processing operation keyboard for imaging signals When you input Okara window processing command, C
The PU 30 connects the CPU of the switching circuit 14 to the AND circuit 16 side, the input of the switching circuit section to the serial-parallel converter nail side,
Switch the switching circuit n to the address generation circuit 21 side, switch the switching circuit U to the parallel-to-serial conversion side, send a write signal to the frame memory 20, a read signal to the frame memory 19, and send a start signal to the address generation circuit 2. Send out. As a result, the address generation circuit 21 sequentially generates addresses from the first address to the last address in the frame memory 19°. The binarized l1rR signal of the target object imaged by the imaging signal is applied to one input of the AND circuit 16 via the switching circuit 14, and the output of the frame memory 19 is applied to the other input by a parallel-to-serial converter. The window data converted to serial data is added at δ, and the AND circuit 16 performs a logical product of the two, so that only the binarized image signal within the window area, that is, only the window-processed image signal is included in the frame. Stored in memory.

■Analysis processing of window-processed imaging signals This is to switch the switching circuit n to the address bus side, send the read signal R to the frame memory, and send the read address from the address bus to the frame memory. This is done by the CPU 30 reading the contents of the frame memory and processing the read data.

As described in detail, according to the present invention, a set window area is displayed on a display device, a cursor is moved within the target window area, and correction commands such as parallel translation, enlargement, and reduction are issued. This has the effect of being able to modify any window data stored in the frame memory just by inputting it.

[Brief explanation of drawings]

FIG. 1 is a configuration explanatory diagram of the present invention, FIG. 2 is a block diagram of main parts of a visual sensor processing system having a window data correction device of the present invention, FIG. 3 is a plan view of a window area setting pattern, and FIG. 4 is an explanatory diagram of the operation of the present invention, and FIG. 5 is a flowchart of window correction processing. 11 is a side image device; 19 is a frame memory for storing window data; additionally is a frame memory for storing window-processed binarized imaging signals; 30 is a CPU; 35 is a key and cursor movement for inputting correction commands. A keyboard 37 is a CRT having keys and the like.

Claims (1)

[Claims] In the apparatus for correcting window data in a visual sensor that obtains a window-processed imaging signal by performing a logical product of the window data read from the window data setting memory and the imaging signal, the window data stored in the window data setting memory is A window area display means for graphically displaying a window area indicated by window data on a display device, a cursor movement key, and a cursor display means for displaying a cursor at a display position of the display device according to an operation of the cursor movement key, parallel to each other. command data input means for inputting command data related to at least one of movement, rotation, enlargement, and reduction processing; and window data setting for the window data indicated by the cursor in accordance with the command data input by the command data input means. A window data modification device comprising: window data modification means for modifying window data in memory.