JPH0658727A - Method and equipment for teaching of image inspecting apparatus - Google Patents

Abstract

PURPOSE:To enable automation of a teaching operation by a method wherein a color distribution at a small image plane position wherefrom the color distribution at an image plane position adjacent to an object of inspection is removed is set as a color extraction reference range for the image plane position of the object of inspection and this is so stored in a color extraction reference range table memory as to correspond to address data. CONSTITUTION:A color extraction reference range table memory 6 is taught color extraction reference range data for image plane positions 19 and 21 of objects of inspection. A color distribution extracted in a color distribution extracting part 7 is subjected to a dispersion processing, so as to prepare color distribution data 20'' on a small image plane position 20 including the image plane position 19 of the object of inspection of a color image 22 of the object of inspection and the image plane position 23 adjacent to the object of inspection and on a small image plane position 20' including the image plane position 21 of the object of inspection and image plane positions 24 and 25 adjacent thereto, and also color distribution data 23' to 25' on the adjacent image plane positions 23 to 25. These data are stored in a color distribution memory 8, together with address data 15, the color distribution data on the adjacent image planes are removed therefrom in a color extraction reference range setting part 9, and the data thus processed are taught the table memory 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a teaching method and a teaching device of a criterion for an image inspection device, and more particularly to a teaching method and a teaching device of a criterion for an image inspection device using color information.

[0002]

2. Description of the Related Art Conventionally, in the mounting process of electronic device production, the position and shape of printed cream solder are measured,
2. Description of the Related Art Inspection based on image recognition is widely used to measure the position and shape of a component, align the component, and determine the quality of a component or a product.

An inspection method using the color information of the color image data, which has a larger number of information than the grayscale image data, has been generalized.

In order for the image inspection apparatus to perform the inspection using the color information of the color image data, first, the color extraction reference range table memory of the image inspection apparatus extracts the color image data of the inspection object. It is necessary to teach the color extraction reference range that defines the color range to be performed.

A conventional teaching method of an image inspection apparatus and a teaching apparatus using this method will be described with reference to FIG.

FIG. 4 is a block diagram showing the structure of a teaching device that uses a conventional teaching method for an image inspection device.

As shown in FIG. 4, the teaching device of the conventional example stores the screen position generating unit 3 of the inspection object and the color image data of the inspection object which is picked up and sequentially sent through an arbitrary route. Image memory 2, a manual teaching operation unit 1, and a color extraction reference range table memory 6.

Next, a conventional teaching method will be described with reference to FIG.

In FIG. 4, when the color extraction reference range that has been used so far is changed and teaching is required, first, from the screen position generating section 3 of the inspection object, the color image data of the inspection object is displayed. The instruction 4 of the inspection target screen position is generated for the image memory 2. Upon receiving the instruction 4, the image memory 2 sends the image data 5 at the instructed screen position to be inspected to the manual teaching operation unit 1. In the manual teaching operation unit 1, the color distribution of the image data 5 at the inspection target screen position that has been sent is extracted by color extraction work, and this extracted color distribution is set as a color extraction reference range. The range is taught in the color extraction reference range table memory 6.

[0010]

The teaching method of the image inspection apparatus and the method of setting the color extraction reference range of the teaching apparatus according to the above-described conventional examples use the color distribution of the inspection object screen position of the color image data of the inspection object as a color distribution. Measure and extract in extraction work,
This is a method of setting this as a color extraction reference range. However, the color distribution of the inspection target screen position and the color distribution of the inspection target adjacent screen position are not completely separated, and in many cases, some of these color distributions overlap each other,
When the color distribution of the inspection target screen position is mechanically measured and extracted by the address data of the inspection target screen position and the inspection target adjacent screen position, the inspection target screen position is included in the extracted color distribution of the inspection target screen position. Not only the colors included but also a part of the colors in the adjacent screen position of the inspection target are included, which causes an error in the inspection, and thus manual correction is necessary. Because of this, it is difficult to automate the color distribution measurement in the color extraction work, and it is performed manually. Therefore, when it is necessary to change the color extraction reference range due to a lot change or design change of the inspection object, or when it is necessary to change the color extraction reference range due to the change over time of the camera or lighting. However, there is a problem that a manual work for setting the color extraction reference range is required, which puts a burden on the operator and takes a long time for the setting.

Further, as described above, not only is the work burden and time required for manual work, but manual correction causes individual differences in judgment in color extraction work, resulting in variations in the color distribution extracted by this method. As a result, the color extraction reference range based on this color distribution also varies, and the accuracy and reliability of the inspection are not good.

The present invention solves the above problems, makes it possible to automate teaching work, reduces the work load of teaching, shortens the working time of teaching, and eliminates variations in the color extraction reference range. It is an object to provide a teaching method for a device and a teaching device.

[0013]

In order to solve the above-mentioned problems, the teaching method of the image inspection apparatus of the present invention is an image inspection method for extracting and inspecting a specific color of a portion to be inspected from color image data. Has a color extraction reference range table memory that stores a color extraction reference range that defines a specific color of the inspection target portion of the inspection target, and the color extraction to be used from this color extraction reference range table memory The reference range is sequentially read out, the color of the color extraction reference range to be used is extracted from the color image data of the inspection object that is imaged and sequentially sent through an arbitrary route, and the extracted color to be used is extracted. The color extraction reference range table of the image inspection device that inspects based on the color image data of the extraction reference range.
In a teaching method of an image inspection device for teaching a color extraction reference range to be stored in a memory, an inspection target screen position of color image data of an inspection target and an inspection target adjacent screen position adjacent to the inspection target screen position are included. The color distribution of the small screen position and the color distribution of the inspection target adjacent screen position are extracted, and the one obtained by removing the color distribution of the inspection target adjacent screen position from the color distribution of the small screen position is the inspection target object. It is characterized in that it is set as a color extraction reference range of the inspection target screen position and is stored in the color extraction reference range table memory in association with address data.

In order to solve the above problems, the teaching device of the image inspection apparatus of the present invention extracts the specific color of the inspection object portion from the color image data and inspects it for the image inspection object. It has a color extraction reference range table memory that stores a color extraction reference range that defines a specific color of the inspection target portion, and sequentially reads out the color extraction reference range to be used from this color extraction reference range table memory, The color image of the color extraction reference range to be used is extracted from the color image data of the inspection object which is picked up and sequentially sent through an arbitrary route, and the extracted color image of the color extraction reference range to be used. A teaching device for an image inspection device that teaches a color extraction reference range to be stored in the color extraction reference range table memory of the image inspection device that performs inspection based on data. In, the color distribution of the small screen position including the inspection target screen position of the color image data of the inspection target and the inspection target adjacent screen position adjacent to the inspection target screen position, and the color distribution of the inspection target adjacent screen position. A color distribution extraction unit to extract, the one obtained by removing the color distribution of the inspection target adjacent screen position from the color distribution of the small screen position is set as the color extraction reference range of the inspection target screen position of the inspection target, A color extraction reference range setting unit for storing this in the color extraction reference range table memory in association with the address data.

[0015]

According to the teaching method of the image inspection apparatus of the present invention, the color distribution of the small screen position including the inspection target screen position of the color image data of the inspection target and the inspection target adjacent screen position adjacent to this inspection target screen position, , The color distribution of the inspection target adjacent screen position is extracted, and the color distribution of the inspection target adjacent screen position is removed from the color distribution of the small screen position to obtain the color of the inspection target screen position of the inspection target. Since it is set as the extraction reference range and is stored in the color extraction reference range table memory in association with the address data, it has the following operation.

That is, the color extraction standard is obtained by removing the color distribution of the inspection target adjacent screen position adjacent to the inspection target screen position from the color distribution of the small screen position including the inspection target screen position and the inspection target adjacent screen position. Since it is a range, the boundary line between the inspection target screen position and the inspection target adjacent screen position is mechanically determined by the address data of the color image data, and the color distribution of the small screen position and the color distribution of the inspection target adjacent screen position are determined. The color in the color extraction reference range that is measured and obtained as described above is always composed of only the color at the inspection target screen position. Therefore, it is possible to perform automatic measurement and eliminate variations in the set color extraction reference range.

The teaching device of the image inspection apparatus according to the present invention has a color distribution of a small screen position including the inspection target screen position of the color image data of the inspection target and the inspection target adjacent screen position adjacent to the inspection target screen position. A color distribution extracting unit that extracts the color distribution of the inspection target adjacent screen position, and the color distribution of the small screen position from which the color distribution of the inspection target adjacent screen position is removed, The color extraction reference range setting unit for setting the color extraction reference range of the target screen position and storing it in the color extraction reference range table memory in association with the address data has the following operation.

That is, a color extraction standard is obtained by removing the color distribution of the inspection target adjacent screen position adjacent to the inspection target screen position from the color distribution of the small screen position including the inspection target screen position and the inspection target adjacent screen position. Since it is a range, the boundary line between the inspection target screen position and the inspection target adjacent screen position is mechanically determined by the address data of the color image data to determine the color distribution of the inspection target screen position and the color distribution of the inspection target adjacent screen position. Is measured and the color in the color extraction reference range obtained as described above is always composed of only the color in the inspection target screen position. Therefore, automatic measurement is possible, and
It is possible to eliminate variations in the set color extraction reference range.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a teaching method for an image inspecting apparatus according to the present invention An embodiment of a teaching apparatus for an image inspecting apparatus using the method will be described with reference to FIG.

In FIG. 1, the control unit 13 controls the inspection target screen position data 14 and the inspection target adjacent screen position data 14 '.
Is sent to the screen position generator 3, the address data 15 is sent to the color distribution memory 8, and the color extraction reference range table designation data 16 is sent to the table designation memory 17, thereby controlling the entire teaching work of the image inspection apparatus. .

The screen position generator 3 sends various screen position data 4 to the image memory 2.

The image memory 2 stores the color image data of the inspection object which is picked up and sequentially sent through an arbitrary route, and from the control unit 13 through the screen position generating unit 3 the screen position generating unit. Based on the small screen position data 14 ″ including the inspection target screen position and the inspection target adjacent screen position and the inspection target adjacent screen position data 14 ′ received corresponding to the screen position data of No. 3, the small screen position data 14 ″. The color image data 5 corresponding to the inspection target adjacent screen position data 14 'is sent to the color distribution extraction unit 7. The color distribution extraction unit 7 extracts a color distribution from the color image data 5 and performs a dispersion process to perform the color distribution data 1
0 is created and sent to the color distribution memory 8. The color distribution memory 8 uses the color distribution data 10 and the address data 15 from the control unit 13 as the color distribution data 11 at the small screen position and the color distribution data 11 ′ at the adjacent screen position to be inspected as the color extraction reference range setting unit 9. Send to. The color extraction reference range setting unit 9 removes the color distribution data 11 ′ of the inspection target adjacent screen position from the sent color distribution data 11 of the small screen position to obtain the color extraction reference range data 12 of the inspection target screen position. Is set and the color extraction reference range table memory 6 is taught. Upon receiving this teaching, the color extraction reference range table memory 6 stores the color extraction reference range data 12.
When the image inspection apparatus performs an inspection by image recognition, the table designation memory 17 to the table instruction data 18
Is sent to the color extraction reference range table memory 6 and the table instruction data 18 from the color extraction reference range table memory 6 is sent.
The color extraction reference range data based on is read and an inspection by image recognition is performed.

Next, the operation of this embodiment will be described with reference to FIGS.

FIG. 2 shows inspection target screen positions 19 and 21 at which the inspection target cream solder printing portion of the color image 22 of the electronic circuit board on which the cream solder is printed, which is the inspection object, is located.
And adjacent inspection target screen positions 23, 24, 2 where various components around the inspection target cream solder printing section are located.
5 and 5 are shown. Color image 22 of the inspection object sent in sequence
Before the inspection by the image recognition of the
The color extraction reference range data 12 (FIG. 1) for 9 and 21 is taught to the color extraction reference range table memory 6 (FIG. 1). In this teaching operation, as described above with reference to FIG. 1, in the color distribution extraction unit 7, the extracted color distribution is subjected to dispersion processing, and the inspection target screen of the color image 22 of the inspection target (electronic circuit board) is displayed. Small screen position 20 including position 19 (cream solder printing part) and inspection target adjacent screen position 23 (various components around the cream solder printing part) and inspection target screen position 21 (cream solder printing part) and inspection target Color distribution data 20 ″ (11 in FIG. 1) of a small screen position 20 ′ including adjacent screen positions 24 and 25 (various components around the cream solder printing portion), and inspection target adjacent screen positions 23 and 24, Color distribution data 23 ', 24', 25 '(11' in FIG. 1) of 25 (various components around the cream solder printing portion) are created.
The color distribution memory 8 stores the color distribution data 20 ″ (11 in FIG. 1) of the small screen positions 20 and 20 ′ of FIG. 3 and the inspection target adjacent screen position 23 of FIG. 3 together with the address data 15 from the control unit 13. , 24, 25 color information distribution data 23 ',
24 'and 25' (11 'in FIG. 1) are sent to the color extraction standard distribution range setting unit 9. In the color extraction reference range setting unit 9, the color distribution data 2 at the small screen positions 20 and 20 'in FIG.
0 ″ (11 in FIG. 1), the color information distribution data 23 ′, 24 ′ at the inspection target adjacent screen positions 23, 24, 25 in FIG.
25 '(11' in FIG. 1) is removed to create color extraction reference range data 26 (12 in FIG. 1) at the inspection target screen positions 19 and 21 in FIG. Teaching to 6.

The teaching method for the image inspection apparatus and the apparatus therefor according to the present invention are not limited to the above-described embodiments, but various modes are possible. For example, the inspection target screen positions of the color image 22 of the inspection target are 19 and 21 in this embodiment,
It is not limited to two places. The circuit configuration and role sharing of the embodiment shown in FIG. 1 can be freely designed as long as the purpose can be achieved. The number of color extraction reference range table memories 6 can be freely designed.

[0026]

According to the teaching method and teaching device of the image inspection apparatus of the present invention, a small screen including the inspection target screen position of the color image data of the inspection target and the inspection target adjacent screen position adjacent to this inspection target screen position. Position color distribution,
Extracting the color distribution of the inspection target adjacent screen position and removing the color distribution of the inspection target adjacent screen position from the color distribution of the small screen position is the color extraction of the inspection target screen position of the inspection target. Since it is set as a reference range and is stored in the color extraction reference range table memory in association with the address data, the following effects are obtained.

That is, the color extraction standard is obtained by removing the color distribution of the inspection target adjacent screen position adjacent to the inspection target screen position from the color distribution of the small screen position including the inspection target screen position and the inspection target adjacent screen position. Since it is a range, the boundary line between the inspection target screen position and the inspection target adjacent screen position is mechanically determined by the address data of the color image data, and the color distribution of the small screen position and the color distribution of the inspection target adjacent screen position are determined. The color in the color extraction reference range that is measured and obtained as described above is always composed of only the color at the inspection target screen position. Therefore, it is possible to perform automatic measurement and eliminate variations in the set color extraction reference range.

[Brief description of drawings]

FIG. 1 is a block diagram of an example of a teaching device of an image inspection apparatus using a teaching method of an image inspection apparatus of the present invention.

FIG. 2 is a configuration diagram of a screen position of an inspection object.

FIG. 3 is an operation diagram of setting a color extraction reference range according to this embodiment.

FIG. 4 is a block diagram of a conventional example.

[Explanation of symbols]

2 image memory 3 screen position generation unit 4 various screen position data 5 color image data 6 color extraction reference range table / memory 7 color distribution extraction unit 8 color distribution memory 9 color extraction reference range setting unit 10 color distribution data (color distribution) 11 , 20 ″ Color distribution data (color distribution) at the inspection target screen position 11 ′, 23 ′ to 25 ′ Color distribution data (color distribution) at the adjacent inspection target screen position 12, 26 Color extraction reference range data (Color extraction reference range) 13 control unit 14 inspection target screen position data 14 'inspection target adjacent screen position data 15 address data 16 color extraction reference range table designation data 17 table designation memory 18 table designation data

Claims (2)

[Claims] 1. A color extraction reference range defining a specific color of an inspection target portion of an inspection target is stored for image inspection in which a specific color of the inspection target portion is extracted from color image data and inspected. It has a color extraction reference range table memory that reads out the color extraction reference range to be used from this color extraction reference range table memory sequentially, and the color of the inspection object that is imaged and sent sequentially through an arbitrary route. The color extraction reference range table of the image inspection device that extracts the color of the color extraction reference range to be used from the image data and inspects based on the extracted color image data of the color extraction reference range to be used. In a teaching method of an image inspection apparatus for teaching a color extraction reference range to be stored in a memory, an inspection target screen position of color image data of an inspection target and this inspection target image. The color distribution of the small screen position including the inspection target adjacent screen position adjacent to the surface position and the color distribution of the inspection target adjacent screen position are extracted, and the inspection target adjacent screen position of the inspection target adjacent screen position is extracted from the color distribution of the small screen position. What removed the color distribution is set as a color extraction reference range of the inspection target screen position of the inspection target, and this is stored in the color extraction reference range table memory in association with address data. Teaching method for image inspection device. 2. A color extraction reference range defining a specific color of an inspection target portion of an inspection target is stored for image inspection in which a specific color of the inspection target portion is extracted from color image data and inspected. It has a color extraction reference range table memory that reads out the color extraction reference range to be used from this color extraction reference range table memory sequentially, and the color of the inspection object that is imaged and sent sequentially through an arbitrary route. The color extraction reference range table of the image inspection device that extracts the color of the color extraction reference range to be used from the image data and inspects based on the extracted color image data of the color extraction reference range to be used. In the teaching device of the image inspection device that teaches the color extraction reference range to be stored in the memory, the inspection target screen position of the color image data of the inspection target and this inspection target image. A color distribution extracting unit that extracts a color distribution of a small screen position including an inspection target adjacent screen position adjacent to a surface position and a color distribution of the inspection target adjacent screen position, and the inspection from the color distribution of the small screen position. The one obtained by removing the color distribution of the target adjacent screen position is set as the color extraction reference range of the inspection target screen position of the inspection target, and this is stored in the color extraction reference range table memory in association with the address data. A teaching device for an image inspection device, comprising: