JPS63304381A - Picture pattern checking device - Google Patents

Abstract

PURPOSE:To evaluate the correct print quality by providing a means which converts the character data on a character generator into the dictionary pattern data. CONSTITUTION:An image pickup device 11 supplies an image of a check subject 18 printed by a printer containing a character generator CG. When the character data (a) is inputted from a CG data input circuit 19, a feature dictionary production circuit 20 magnifies the data (a) to produce feature dictionary pattern (b) after magnifying the data (a) up to the picture resolution of the device 11. A thin dictionary production circuit 21 magnifies the pattern (b) up to the minimum diameter of a dot pin of the printer for production of thin dictionary pattern (c). While a thick dictionary production circuit 22 magnifies the pattern (b) up to the maximum diameter of said dot pin for production of a thick dictionary pattern (d). Thus the patterns (b), (c), (d) are produced from the data (a) so that the dot position printed actually and the output position of the registered dot pin can be checked.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image pattern inspection device, and more specifically, to a technology for inspecting the quality of printing by a dot printer or the like.

[Conventional technology]

FIGS. 6 and 7 are diagrams illustrating a conventional inspection apparatus.

FIG. 6 is a block diagram of the inspection device, and in the figure, image carrier 1. An A/D conversion circuit 2, an image memory 3, a pattern matching circuit 4, an S memory 5, a control system 6, a result output cuff, and an inspection object 8 are shown.

FIG. 7 shows an example of a dictionary pattern stored in the dictionary memory 5. For example, the large sum and repattern of the letter C is used to compare and match the large limit of the pattern to be inspected, and the small and small pattern is used to compare and match the thin limit of the pattern to be inspected. Further, the feature dictionary pattern is used in character 1 intelligence to distinguish between the characters rCJ and "O".

In addition, the present inventors previously applied for a patent for the inspection using the pattern matching method (Japanese Patent Application No. 5, 1973, J-188804).
There is.

[Problem that the invention seeks to solve]

By the way, when evaluating the quality of print printed by a dot printer using a conventional inspection device, for example, when printing the letters rt and 1, the letter "C" may be replaced by the letter "0" due to bending of the dot pin or lack of pressure. may be recognized. For this reason, the inspection device compares the image pattern data of the character "0" with the dictionary pattern data of the character "0", performs an inspection based on incorrect identification, and cannot correctly evaluate the character "C".

For this reason, there is a problem in that the conventional inspection apparatus cannot inspect whether or not the dots of the dot printer have printed characters at predetermined positions.

The present invention was created in view of such conventional problems, and an object of the present invention is to provide an inspection device that can create a dictionary pattern from character data of a character generator and accurately evaluate print quality.

[Means for solving problems]

An unoccurred IJI is detected by an imaging device 11. which manually prints an image of the inspection target using a printer with a built-in character generator. , an A/Df conversion circuit 12 that digitizes the analog image signal output from the imaging bag 2111, an image memory 13 that stores digital image data output from the A/D conversion circuit 12, and an image in the image memory 13. In an image pattern inspection apparatus for inspecting an image to be inspected, the image pattern inspection apparatus includes a pattern matching circuit 14 for comparing pattern data and dictionary pattern data, and a memory 15 for storing the dictionary pattern data. The present invention is characterized in that means is provided for making the f-event into the above-mentioned letter S pattern data.

[Effect]

According to the present invention, the character data of the character generator that instructs dot pins to be ejected at the positions of the dots forming the 4R of the designated character is registered in the dictionary pattern data, thereby registering the dot positions with the printed dots. It becomes possible to inspect the launch position t of the dot pin.

〔Example〕

Next, embodiments of the present invention will be explained with reference to the figures.IJI
do.

FIG. 1 is a block diagram illustrating the configuration of the inspection apparatus of the present invention. In FIG. 1, 11 is an imaging bag 21 for inputting an image of the inspection object, and 12 is an A/D conversion circuit for digitizing an analog image signal. , 13 is an image memory for storing digital image data, 14 is image pattern data, and ! Pattern matching circuit for comparing with I pattern data, 1
5 is a dictionary memory for storing dictionary pattern data; 16 is a controller for each circuit; 17 is an output of the test results of the test object;
8 is an object to be inspected such as printer printing. Until now, the inspection equipment according to the conventional example is this 41! It is similar to
The present invention differs in that it has the following configuration. That is, 1
9 is a circuit for inputting character data of the character generator of the printer, 20 is a circuit for creating feature word 3, 21 is a circuit for creating thin dictionary pattern data, 22 is a circuit for creating thick dictionary pattern data, 23 is a dictionary pattern This is a circuit that weights the characteristics of data.

FIG. 2 is a diagram illustrating an example of a method for creating a dictionary pattern.

First of all, (a) in the same figure shows a character pattern of the character generator 0, for example, data specifying the dot pin launching position necessary for the printing configuration of the character rCJ is registered in the character generator, and (b) in the same figure shows the character pattern This is a characteristic dictionary pattern of the character "C" created by enlarging the character data 24 of the generator to the image cultural moat of the imaging device of the imaging device, and is used when identifying the characters "C" and "0".

Next, in (C) of the same figure, the character r (
This is a thin dictionary pattern of J, and is used when comparing the thinning limit of the pattern to be inspected.

In addition, the same figure (d) shows the character "
This is the large scale pattern 27 of "C" and is used when comparing the large limits of the patterns to be inspected.

FIGS. 3, 4 and 5 are explanatory diagrams relating to the inspection of the quality of print printed by a dot printer using the inspection apparatus of the present invention.

Figure 3(a) shows a detailed dictionary pattern for the character rcJ created from the character data of the character generator;
b) shows the Daijiko pattern of the character “0”;
indicates the feature dictionary pattern of the characters rQ, +.

FIG. 4(a) shows the actual image pattern of the letter "C" printed by a dot printer, and FIG. 4(b) shows the actual image pattern of the letter "C" printed by a dot printer.
A real image of the letter "J" is shown, and (C) of the same figure shows a real image pattern of the letter "Q".

FIG. 5(a) shows the m dictionary pattern of the letter "C" and the actual image pattern and matching pattern of the letter rCJ printed out by a dot printer. Note that since the dot pin is not ejected to the predetermined position, a misaligned portion of the printed dot is detected.

FIG. 2B shows a dictionary pattern of the character "0" and an actual image pattern of the character "0" printed out by a dot printer. Note that since the dot pins are not hitting the paper surface with a predetermined pressure, the portion of printed dots being removed is detected.

Next, FIG. 6(c) shows the 41f character pattern of the letter "Q", the actual image pattern of the letter rQJ printed by the dot printer, and the matching pattern. Note that, as in the case of FIG. 7B, the portion of the printed dot 7 is detected.

In this way, by comparing the actual image pattern data of the printed characters printed by the dot printer with the dictionary pattern data, it is possible to check whether the dot pins are printed at the predetermined positions t that make up the characters. Pa
becomes.

[Effect of appropriation]

As explained above, according to the present invention, by creating dictionary pattern data from the character data of the character generator, it is possible to check the dot positions printed at ¥ and the registered dot pin launch positions t. becomes possible.

Therefore, it is necessary to accurately evaluate the print quality of the dot printer, which was not possible with conventional inspection equipment.

[Brief explanation of the drawing]

FIG. 1 is a diagram illustrating an inspection apparatus according to an embodiment of the present invention; FIG. 52 is a diagram illustrating a method for creating a dictionary pattern of an inspection apparatus according to an embodiment of the present invention. FIG. 3 is a diagram illustrating a dictionary pattern for print inspection using the inspection system according to the embodiment of the present invention, and FIG. 4 is a diagram illustrating an actual image pattern for print inspection using the inspection apparatus according to the embodiment of the present invention. FIG. 5 is a diagram illustrating a matching pattern for print inspection by an inspection device according to an embodiment of the present invention, FIG. 6 is a diagram illustrating a conventional inspection device, and FIG. 7 is a dictionary pattern according to a conventional example. FIG. (Explanation of symbols) 1.11... Imaging device, 2.12... A/D conversion circuit, 3.13... Image memory, 4.14... Pattern switching circuit, 5.15.
...Dictionary memory, 6.16...Control system, 7.17...Result output, 8.18...Inspection against Mongolia, 19...CD data, 20...Characteristic dictionary, Ri creation circuit , 21...Circuit for creating detailed words, 22...Circuit for creating bold words δ, 23...Circuit for tonime.

Claims (2)

[Claims] (1) An imaging device (11
), an A/D conversion circuit (12) that digitizes the analog image signal output from the imaging device (11), and the A/D
An image memory (13) that stores digital image data output from the conversion circuit (12), a pattern matching circuit (14) that compares the image pattern data of the image memory (13) with dictionary pattern data, and the dictionary pattern data. An image pattern inspection apparatus for inspecting an image to be inspected, comprising a dictionary memory (15) for storing an image pattern, further comprising means for converting character data of the character generator into the dictionary pattern data. Inspection equipment. (2) The dictionary pattern data includes feature dictionary pattern data created by enlarging the character data to the image resolution of the imaging device, and feature dictionary pattern data created by enlarging the feature dictionary pattern data to the minimum diameter of the dot pins of the printer. and thick dictionary pattern data created by enlarging the characteristic dictionary pattern data to the maximum diameter of the dot pins of the printer. inspection equipment.