JP3220526B2 - Teaching method and teaching device for image inspection device - Google Patents

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 have been measured,
2. Description of the Related Art Inspection by image recognition is widely used for measuring the position and shape of a component to perform component alignment, and to judge the quality of the component or product.

Inspection methods using color information of color image data having more information than gray image data have become common.

In order for the image inspection apparatus to perform an 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 from the color image data. It is necessary to teach a color extraction reference range that defines a 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 a configuration of a teaching device using a teaching method of a conventional example of an image inspection device.

As shown in FIG. 4, the conventional teaching device stores a screen position generating unit 3 for an inspection object and color image data of the inspection object sequentially picked up and sent via an arbitrary route. 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 used up to now is changed and teaching becomes necessary, first, the screen position generator 3 for the inspection object outputs the color image data of the inspection object. Is issued to the image memory 2. Upon receiving the instruction 4, the image memory 2 sends the image data 5 at the specified inspection target screen position to the manual teaching operation unit 1. The manual teaching operation unit 1 extracts the color distribution of the image data 5 at the screen position of the inspection object sent by the color extraction work, sets the extracted color distribution as a color extraction reference range, and sets the color extraction reference. The range is taught in the color extraction reference range table memory 6.

[0010]

The teaching method of the conventional image inspection apparatus and the method of setting the color extraction reference range of the teaching apparatus described above are based on the color distribution at the position of the inspection target screen in the color image data of the inspection target. Measure and extract by 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 from each other, and a part of these color distributions often overlap each other.
When the color distribution of the inspection target screen position is mechanically measured and extracted based on the address data of the inspection target screen position and the inspection target adjacent screen position, the color distribution of the inspection target screen position is included in the inspection target screen position. Not only the color included but also a part of the color at the position of the adjacent screen to be inspected is included, which causes an error in the inspection. Therefore, manual correction is required. For this reason, 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 becomes necessary to change the color extraction reference range due to changes over time in the camera or lighting. However, manual work of setting the color extraction reference range is required, which places a burden on the operator and takes time to set.

In addition, as described above, not only the manual work load and time are required, but also in the manual correction, individual judgment is made in the color extraction work, and the color distribution extracted by this method varies. Occurs, the color extraction reference range based on this color distribution also varies, and the accuracy and reliability of the inspection are poor.

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

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a teaching method of an image inspection apparatus according to the present invention is directed to an image inspection method for extracting a specific color of an inspection target from color image data and inspecting the extracted color. A color extraction reference range table memory storing a color extraction reference range defining a specific color of the inspection target portion of the inspection object, and a color extraction to be used from the color extraction reference range table memory. The reference range is sequentially read out, and the color of the color extraction reference range to be used is extracted from the color image data of the inspection object which is imaged and sequentially sent via an arbitrary route, and the extracted color to be used is extracted. The color extraction reference range table of the image inspection apparatus that performs an inspection 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 at the small screen position and the color distribution at the inspection target adjacent screen position are extracted, and the color distribution at the inspection target adjacent screen position is removed from the color distribution at the small screen position, A color extraction reference range at the position of the inspection target screen is set and stored in the color extraction reference range table memory in association with address data.

In order to solve the above-mentioned problems, a teaching device for an image inspection apparatus according to the present invention extracts a specific color of an inspection target portion from color image data and inspects the inspection target object for image inspection. A color extraction reference range table / memory storing a color extraction reference range defining a specific color of the inspection target portion, and sequentially reading out a color extraction reference range to be used from the color extraction reference range table / memory; The color of the color extraction reference range to be used is extracted from the color image data of the inspection object sequentially imaged and sent through an arbitrary route, and the extracted color image of the color extraction reference range to be used is extracted. A teaching device of an image inspection apparatus for teaching a color extraction reference range to be stored in the color extraction reference range table memory of the image inspection apparatus 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 be extracted, and a color distribution of the small screen position from which the color distribution of the inspection object adjacent screen position is removed is set as a color extraction reference range of the inspection object screen position of the inspection object; A color extraction reference range setting unit for storing the color extraction reference range table / memory in association with address data.

[0015]

In the teaching method of the image inspection apparatus according to 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 the inspection target screen position is determined. The color distribution of the inspection target adjacent screen position is extracted from the color distribution of the inspection target adjacent screen position, and the color distribution of the inspection target adjacent screen position is removed from the color distribution of the inspection target adjacent screen position. Since it is set as an extraction reference range and is stored in the color extraction reference range table memory in association with address data, the following operations are provided.

That is, the color distribution at the position of the adjacent screen to be inspected adjacent to the screen position to be inspected is removed from the color distribution at the small screen position including the screen position to be inspected and the adjacent screen position to be inspected. Because of the range, the boundary between the screen position to be inspected and the adjacent screen position to be inspected is mechanically determined by the address data of the color image data, and the color distribution at the small screen position and the color distribution at the adjacent screen position to be inspected are determined. The color in the color extraction reference range measured and obtained as described above always consists of only the color at the position of the inspection target screen. Therefore, automatic measurement becomes possible, and variations in the set color extraction reference range can be eliminated.

According to the teaching device of the image inspection apparatus of the present invention, the color distribution at 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 is determined. A color distribution extraction unit that extracts a color distribution of the inspection target adjacent screen position, and a color distribution of the inspection target adjacent screen position removed from the color distribution of the small screen position, and performs the inspection of the inspection target object. There is provided a color extraction reference range setting unit that sets the target screen position as a color extraction reference range and stores the color extraction reference range in the color extraction reference range table memory in association with address data.

That is, the color distribution at the position of the adjacent screen to be inspected adjacent to the screen position to be inspected is removed from the color distribution at the small screen position including the screen position to be inspected and the adjacent screen position to be inspected. Since it is a range, the boundary 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 inspection target screen position and the color distribution of the inspection target adjacent screen position are determined. Is measured, and the color in the color extraction reference range obtained as described above always consists of only the color at the position of the inspection target screen. Therefore, automatic measurement becomes possible, and
Variations in the set color extraction reference range can be eliminated.

[0019]

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

In FIG. 1, the control unit 13 controls inspection screen position data 14 and inspection adjacent screen position data 14 '.
To the screen position generator 3, the address data 15 to the color distribution memory 8, and the color extraction reference range table designation data 16 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 is sent from the control unit 13 via the screen position generating unit 3 to the screen position generating unit. 3 based on the small screen position data 14 "and the adjacent screen position data 14 'to be inspected, including the screen position to be inspected and the adjacent screen position to be inspected, which are received in correspondence with the screen position data No. 3 described above. And the color image data 5 corresponding to the inspection target adjacent screen position data 14 ′ 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 on the color distribution data 1.
0 is 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 color distribution data 11 at the small screen position and color distribution data 11 'at the adjacent screen position to be inspected. Send to The color extraction reference range setting unit 9 removes the color distribution data 11 ′ of the adjacent screen position to be inspected from the color distribution data 11 of the received small screen position, and outputs the color extraction reference range data 12 of the inspection screen position. Is set in the color extraction reference range table memory 6. The color extraction reference range table memory 6 receives the teaching and stores the color extraction reference range data 12.
When the image inspection apparatus performs inspection by image recognition, the table instruction data 18
Is sent to the color extraction reference range table memory 6, and the table instruction data 18 is read from the color extraction reference range table memory 6.
The color extraction reference range data based on the image data 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 object screen positions 19 and 21 where the cream solder printed part of the color image 22 of the electronic circuit board on which the cream solder is to be inspected is located.
Inspection target adjacent screen positions 23, 24, 2 where various components around the inspection target cream solder printing section are located.
5 is shown. Color images 22 of the inspection object sequentially sent
Before performing the inspection by image recognition, the inspection target screen position 1
Teaching the color extraction reference range data 12 (FIG. 1) corresponding to 9 and 21 to the color extraction reference range table memory 6 (FIG. 1). In this teaching operation, as described with reference to FIG. 1 described above, the color distribution extraction unit 7 performs a distributed process on the extracted color distribution, and displays the inspection target screen of the color image 22 of the inspection target (electronic circuit board). Small screen position 20 and inspection target screen position 21 (cream solder printing portion) including position 19 (cream solder printing portion) and inspection adjacent screen position 23 (various components around cream solder printing portion) and inspection target The color distribution data 20 ″ (11 in FIG. 1) of the small screen position 20 ′ including the adjacent screen positions 24 and 25 (various components around the cream solder printing section) and the adjacent screen positions 23 and 24 to be inspected. The color distribution data 23 ', 24', and 25 '(11' in FIG. 1) of 25 (various components around the cream solder printing section) are created.
The color distribution data 20 ″ (11 in FIG. 1) of the small screen positions 20 and 20 ′ in FIG. 3 together with the address data 15 from the control unit 13 and stored in the color distribution memory 8; , 24, 25 color information distribution data 23 ',
These are sent to the color extraction standard distribution range setting unit 9 as 24 'and 25' (11 'in FIG. 1). In the color extraction reference range setting unit 9, the color distribution data 2 of the small screen positions 20 and 20 'in FIG.
From 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) for the inspection target screen positions 19 and 21 in FIG. Teaching to 6.

The teaching method of the image inspection apparatus and the apparatus according to the present invention are not limited to the above-described embodiment, but may take various forms. For example, the inspection target screen positions of the color image 22 of the inspection target are two positions of 19 and 21 in this embodiment.
Not limited to two places. The circuit configuration and role assignment of the embodiment shown in FIG. 1 can be freely designed as long as the object can be achieved. The number of color extraction reference range table memories 6 can be freely designed.

[0026]

According to the teaching method and the teaching device of the image inspection apparatus of the present invention, the small screen including the inspection target screen position of the color image data of the inspection target and the inspection adjacent screen position adjacent to the inspection target screen position. Location color distribution,
The color distribution of the inspection target adjacent screen position is extracted from the color distribution of the inspection target adjacent screen position, and the color distribution of the inspection target adjacent screen position is removed from the color distribution of the inspection target adjacent screen position. Since the reference range is set and stored in the color extraction reference range table memory in association with the address data, the following effects are obtained.

That is, the color distribution of the adjacent screen position adjacent to the inspection target screen removed from the color distribution of the small screen position including the inspection target screen position and the inspection target adjacent screen position is determined as a color extraction criterion. Because of the range, the boundary between the screen position to be inspected and the adjacent screen position to be inspected is mechanically determined by the address data of the color image data, and the color distribution at the small screen position and the color distribution at the adjacent screen position to be inspected are determined. The color in the color extraction reference range measured and obtained as described above always consists of only the color at the position of the inspection target screen. Therefore, automatic measurement becomes possible, and variations in the set color extraction reference range can be eliminated.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of a teaching device of an image inspection device using a method of teaching an image inspection device according to the present invention.

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

FIG. 3 is a setting operation diagram of a color extraction reference range according to the present 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 inspection target screen position 11 ′, 23 ′ to 25 ′ Color distribution data (color distribution) at inspection adjacent 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 specification data 17 table specification memory 18 table specification data

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01B 11/00-11/30 102 G01N 21/84-21/958 G06T 1/00 G06T 7/00

Claims (2)

(57) [Claims] 1. A color extraction reference range that defines a specific color of an inspection target portion of an inspection target for image inspection for extracting a specific color of the inspection target portion from color image data and inspecting the extracted color. The color extraction reference range table memory to be used is sequentially read out from the color extraction reference range table memory, and the color of the inspection object which is imaged and sequentially sent through an arbitrary route is stored. The color extraction reference range table of the image inspection apparatus for extracting a color of the color extraction reference range to be used from image data and performing an inspection 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, a position of an inspection target screen of color image data of an inspection target and an image of the inspection target image are determined. 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 color distribution of the inspection target adjacent screen position is extracted from the color distribution of the small screen position. Removing the color distribution as a color extraction reference range of the inspection target screen position of the inspection object, and storing the color extraction reference range in the color extraction reference range table memory in correspondence with the address data. Teaching method of an image inspection apparatus to be performed. 2. A color extraction reference range defining a specific color of an inspection target portion of an inspection target for image inspection for extracting a specific color of the inspection target portion from color image data and inspecting the extracted color. The color extraction reference range table memory to be used is sequentially read out from the color extraction reference range table memory, and the color of the inspection object which is imaged and sequentially sent through an arbitrary route is stored. The color extraction reference range table of the image inspection apparatus for extracting a color of the color extraction reference range to be used from image data and performing an inspection based on the extracted color image data of the color extraction reference range to be used. In a teaching device of an image inspection device for teaching a color extraction reference range to be stored in a memory, a position of an inspection target screen of color image data of an inspection target and an image of the inspection target image are displayed. A color distribution extraction unit for extracting a color distribution at a small screen position including an inspection target adjacent screen position adjacent to a surface position and a color distribution at the inspection target adjacent screen position; and performing the inspection based on the color distribution at the small screen position. A color distribution at the target adjacent screen position removed is set as a color extraction reference range of the inspection target screen position of the inspection object, and stored in the color extraction reference range table / memory in association with the address data. And a color extraction reference range setting unit for causing the image inspection apparatus to perform the teaching.