JP3048301U - Automatic start line setting device for image inspection equipment - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of pattern matching inspection is to automatically match the start line of the sample with the inspection object. [Structure] A horizontal address having a large color change in a vertical address is determined, incremented by the number of vertical lines in the vertical direction, and a start address in which the starting point of the inspection image is shifted, a sample image, and a small difference between 500 points of line data. Automatic setting device for collation start line to determine

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention is necessary for a pattern matching type inspection apparatus for industrial products, printed matter, etc., and is absolutely necessary especially when the outer shape and the content position are shifted.

[0002]

[Prior art]

 In conventional image processing, it is assumed that the positional relationship between the outer shape and the inspection content matches, and the outer shape edge is used as the matching start line. For this reason, the inspection accuracy could not be improved due to the total displacement. However, if accuracy is required, the starting point of pattern matching is shifted many times, and inspection is performed based on the matching times with the least amount of deviation. For example, if there is a pixel that needs to be detected, the result cannot be matched. In addition, the color was determined based on characteristic colors or characters, but the standard difference was large and unstable.

[0003]

[Problems to be solved by the invention]

 As described in the background art, the starting line of the pattern matching is automatically set regardless of the outer shape.

[0004]

[Means for solving the problem]

 FIG. 1 Selects, for example, 800 horizontal addresses in the sample memory where color changes are large. The inspection starts and the image enters the inspection object memory. In FIG. 2, only the data at the horizontal address 800 is taken out of the vertical address 0, binarized by (a) and (b), and the binary data is inputted to the counter of the comparison difference detection unit (a). The result is recorded in (d1). Next, only the inspection memory is incremented, and the data at address 1 is compared with the read 0 as shown in FIG. (However, the inspection memory is the same if only the symbols are separated for explanation. Therefore, (b), (c), and (d) are the same inspection image binarization unit, and (b) and (c) are the comparison detection data. The difference data is recorded in (d1). Hereinafter, the start point check ends with the 500th data shifted one by one. When the processing is completed, the minimum value of the data is selected in (d2), the vertical address at that time is output to (e), and the signal for determining the vertical start address of the inspection memory is output to (e).

Since the test start address is determined, the test memory starts collation from the determined vertical address. Of course, the sample memory can start full-screen collation from address 0.

[0006]

[Action]

 This work is programmatically operated by the board computer shown in FIG. 3BC to automatically set the start line.

[0007]

【Example】

 In FIG. 3, the digital image enters (S0). In order 1, the sample image is fetched, (S0) falls into a black circle, and the image enters the sample memory. This switching procedure is performed by a BC board computer. In addition, in the read-in operation, both (S1) and (S2) are driven on the black circle side.

In order 2, the start of the inspection (S0) is switched to the white circle side, and the image is stored in the inspection memory.

In order 3, drive is performed so that (S1) and (S2) are switched to the white circle side, and an arbitrary horizontal address is incremented in the vertical direction by STDRIV. The difference between the sample data and the inspection data for each vertical address is detected, and when 0 to 500 pieces of data to be stored in (d1) are obtained, the vertical address (e) having the smallest difference in (d2) is determined. The data is sent to ST DRIV, and the read start address of the inspection memory is shifted by a black circle (S3).

[0010]

[Effect of the invention]

 In order 4, (S1) and (S2) fall to the black circle side, and a signal is output from the inspection drive INSDRIV. As a result, the sample memory starts at address 0 for both horizontal and vertical, the inspection memory starts at address 0 for horizontal, and the vertical starts from the address determined in step 3. The start line is now set.

Step 5 is a full-screen inspection performed by the INS pattern collation inspection machine while collating data with the INS.

[0012]

[Effect of the invention]

 The present invention has the following effects.

[0013] Since the start start line is adjusted for each actual inspection object, the overall inspection accuracy is improved.

[0014] The start of the outer shape and the content position do not match with ordinary industrial products or printed matter. Therefore, the types that could not be inspected can be inspected.

The set time is negligibly short because 500 data are read faster than the full-screen read clock and the start line is determined.

[Brief description of the drawings]

FIG. 1 is a diagram showing a horizontal and vertical address of a memory screen and an arbitrary horizontal address 800.

FIG. 2 is a diagram illustrating a collation start line detection diagram in which the vertical addresses of a sample memory and an inspection memory are incremented, and where to read the inspection memory to read the same image;

FIG. 3 is an embodiment of the present invention.

[Explanation of Reference Codes] Sample memory Inspection memory Example in which the vertical address is shifted by one line Example in which the vertical address is shifted by 500 lines 0 Address 0 1000 Horizontal address final 1000 500 Vertical address final 500 800 Any horizontal horizontal line Address (a) Sample data binarization unit (b) (c) (d) Inspection data binarization unit (a) (b) (c) Comparative difference detection unit (d1) Data memory for 500 lines (d2) Minimum value detection unit (e) Minimum value vertical address signal IN Digital image input (S0) Sample memory detection memory input selector switch (S1) Sample memory drive selector switch (S2) Inspection memory drive selector switch (S3) Inspection memory drive vertical Address shift switch IN During pattern matching inspection machine INSDRIV image capture, it sets the memory address clock driver STDRIV horizontal address during a test, and then Inclusive Instruments vertical address only high-speed inspection memory 5
Start line detection driver that counts and drives 00 addresses BC board computer

Claims (1)

[Utility model registration claims] In a pattern matching type image inspection apparatus for collating repetition of an inner cylindrical printed matter or a strip of the same picture, a reading section for reading an arbitrary vertical single line into a sample memory section and an inspection memory section. And a comparison start setting unit having a function of delaying the pixels read out from the inspection memory by one pixel and setting a phase having the smallest difference between the two, in an image inspection apparatus.