JPS6010133A - Color discriminating apparatus of article - Google Patents

Abstract

PURPOSE:To automatically discriminate the color of an article, by discriminating the coincidence of the patterns based on binarization of respective three primary color picked up image signals of an article to be measured and the similarily calculated patterns of a reference article. CONSTITUTION:Three primary color picked up image signals of a red, a green and a blue when an article to be measured is picked up by a TV camera 1 are respectively processed with binarization circuits 2R, 2G, 2B and the patterns based on binary informations are stored in memories 3R, 3G, 3B. These stored valves are respectively compared with the color patterns of a reference article having the same shape as the article to be measured stored in memories 4R, 4G, 4B in the comparator circuits 6R, 6G, 6B of a discriminator circuit 5. In this case, the coincidence outputs of the circuits 6R, 6G, 6B are processed with an adder circuit 7 and a max. detector circuit 8 and, when either one of three primary color patterns is coincided with the patterns of the reference article, the color of the article to be measured is automatically discriminated on the basis of the color of the reference article without relying on visual sensation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a color discrimination device for articles such as color coded resistors.

[Technical Background of the Invention and Problems Therewith] For example, a color-coded resistor (the resistance value of which is determined by a plurality of colored bands on the surface of the resistor, that is, a color code) is used as an article for which it is necessary to distinguish the color on its surface. resistance shown)
There is.

For example, when assembling an electronic circuit board, after components are mounted on the board, the board is subjected to visual inspection (inspecting whether the correct components are installed in the predetermined positions on the board) and electrical inspection. It is being said.

Most electrical inspections have already been automated, but there is still no effective means for visual inspection. For example, determining the color of a color-coded resistor is one of them. be. In other words, the color discrimination of color-coded resistors is done through visual inspection by skilled inspectors, and for this reason, it has been desired to automate such visual inspections for reasons such as quality control and health management of inspectors. .

[Object of the Invention] The present invention has been made in consideration of the above problems, and an object thereof is to provide a device that can automatically determine the color of an article without visual inspection. It is said that

[Summary of the Invention] The present invention provides an imaging means for imaging an article to be measured without separating it into three primary colors of red, green and blue, and outputting image signals of the three primary colors of red, green and blue; The three primary color imaging signals from the image carrier are individually binarized to become signals for discrimination 3
a first memory that stores patterns of three signals to be determined from the three binarization circuits;
a second memory that stores three reference signal patterns each of which is divided into two primary colors of green and blue; a second memory that stores three patterns of signals to be discriminated from the first memory; A color discriminating device for an article is characterized in that it includes a discriminating circuit that outputs a discriminating signal when all of the same primary colors match a pattern of a reference signal.

Embodiments of the Invention] FIG. 1 is a schematic configuration diagram showing one embodiment of a color discrimination device for color coded resistors according to the present invention.

1 is a collar IT fixed in place as shown
This camera 1 is a V camera (hereinafter referred to as a camera), and outputs imaging signals of three primary colors: red, green, and blue. A Kireri '17 (not shown) is arranged below the camera 1,
Boards (not shown) on which color-coded resistors to be discriminated are attached are positioned and juxtaposed on the carrier A7, and the boards are sequentially carried to a predetermined position directly below the camera 1 by the rear of the carrier A7. come.

Therefore, the color coded resistor located at a predetermined position directly below the camera 1 is imaged by the camera 1.

2R, 2G, 2B are red from camera 1, edge J3 J,
This is a binarization circuit that individually converts the three primary color 1st image signals of blue and blue into binary values (ON or 0FF) using appropriate levels as thresholds and converts them into signals to be discriminated (2R is red, 2G (binarizes the primary color image signals of green and 2B and blue, respectively). This appropriate level is set in advance so that the color you want to discriminate can be distinguished from other colors, and this appropriate level may be the same for each binarization circuit 2R12G, 2B, or All may be different from each other.

3R13G and 3B are three binarization circuits 21<, 2
This is a memory that individually stores patterns of three binarized signals to be determined from G and 2B.

4(k), 4G and 4B are memories that each store three reference signal patterns, and these three reference signal patterns are stored in, for example, a color-coded resistor with a reference color code attached to a board. is imaged in advance by camera 1, and three binarization circuits 2R12G, 2B
It is obtained by binarizing the three primary color imaging signals of red, green J3 and positive (4R is red, 4G is green, 4
B stores the reference signal pattern of each primary color of blue). Also, for example, in memories 4R, 4G and 4B! Regarding a color coded resistor having a color code corresponding to J, signal patterns corresponding to the primary colors of red, green, and blue may be stored in advance.

5 is a discrimination circuit, and this discrimination circuit 5 is composed of three comparison circuits 6R, 6G, and 6B, an addition circuit 7, and a maximum value detection circuit 8.

The comparison circuit 6R uses the pattern and standard of the signal to be determined stored in the memories 2 RJ5 and 4R, the comparison circuit 6G in the memories 2G and 4G, and the comparison circuit 6B in the memories 2B and 4B. The signal patterns are compared, and a signal is output when the patterns of both signals (the pattern of the signal to be determined and the pattern of the reference signal) match.

Addition circuit 7 tj adds signals from each comparison circuit 6R16G, 6B. The maximum value detection circuit 8 detects a discrimination signal (i.e., a color code resistance based on the color code of the color code resistance to be measured) when the number of signals added in the addition circuit 7 reaches the maximum (i.e., 3). A signal indicating that the color code is the same as the color code) is output to a suitable display means (for example, a CRT). J3, maximum value detection circuit 8 displays the color code of the color coded resistance to be measured on an appropriate display means when the number of signals added by J3 in addition circuit 7 is 2 or less. It can also be configured to output a signal indicating that the color code is different.

According to the above configuration, color coded resistors attached to predetermined positions on the board are judged in the following manner (resistances to be measured are shown in Fig. 2 (A) and Fig. 3 (I)). ) and a color coded resistor 11 having a color code as shown in FIG. 4 as an example.

That is, the color code resistor 9 attached to a predetermined position on the board that is carried to a predetermined position directly below the camera 1 is imaged by the camera 1. At that time, the binarization circuits 2R, 2G
The patterns of the binarized signals to be determined obtained by , 2B are as shown in Figure 2 (b), (c), and (d) ((b) is red, (c) is green, and (d) corresponds to the imaging signal of the blue primary color). The pattern of each of these signals is memory 3R.
13G and 3B, respectively.

On the other hand, the memory 4R of the color code resistor 11 serving as a reference,
The pattern of the reference signal in 4G and 4B is shown in Figure 4 (b).
(C) As shown in (D) ((B) corresponds to the primary colors of red, (C) to green, and (D) to blue).

In the comparison circuits 6R, 6G, and 6B, the memory 3R
, 3G, 3B and 4R, 4G, 4B are compared. That is, the patterns in Figure 2 (B) and Figure 4 (B), Figure 2 (C) and Figure 4 (C), and Figure 2 (D) and Figure 4 (D) are compared, respectively. . Since these all match, signals are output from the comparison circuits 6R, 6G, and 6B, these are added by the addition circuit 7, and the maximum value detection circuit 8 outputs a discrimination signal.

On the other hand, a color hood resistor 10 as shown in FIG.
When the R image is formed by the camera 1, the binarization circuit 2 [k,
2G and 2B, the pattern of the binary signal to be discriminated ((b)
(corresponding to the primary color imaging signals of red, (c) green, and (d) blue) are obtained.

Therefore, in this case, the third
The pattern of the signal to be discriminated shown in FIG. 4(b) matches the pattern of the reference signal shown in FIG. In this case, the pattern of the signal to be discriminated shown in Fig. 3 (c) (d) and the pattern of the signal to be determined shown in Fig. Since the pattern of the l-1 quasi-signal does not match, no signal is output from these comparison circuits 6G16B.

A3: By separating the light from the object to be measured into the three primary colors of red, green, and blue and obtaining the C'MQ image signal pattern, the following color discrimination can be performed. .

(red), (green), and (blue) are respectively binarized red and
[Effects of the Invention] Regarding Patterns of Imaging Signals of Primary Colors of Green and Blue As explained above, according to the present invention, it is possible to discriminate the object to be measured without visual inspection.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of a color discrimination device for color-coded resistors according to the present invention, and FIG. 2(A), FIG. 3(A), and FIG. 4(A) show color-coded resistors. Figures 2 (B) (C) (D) and Figure 3 (B) (C) (D) are diagrams showing patterns of signals to be discriminated regarding the primary colors of red, green, and blue, and Figure 4 ( (b), (c), and (d) are diagrams showing patterns of red, green, and blue reference signals. 1... Camera 2R12G, 2B... Binarization circuit 3
R13G, 3B, 4R14G, 4B...Memory 5...
・Discrimination circuit 6R, 6G, 6B... Comparison circuit 7...
Additive circuit 8...Maximum value detection circuit application agent Patent attorney Kikuchi Okabe 1st II 2nd II 3rd m (ψ) (ν) shi\) (han (ni) (d) 1 4th WA (ψ) (ha ) (d)

Claims (1)

[Claims] an imaging means that separates the object to be measured into three primary colors of red, green, and blue, and outputs the three primary color image signals of red, green, and blue; three binarization circuits that individually binarize the primary color carrier signals into signals to be discriminated, and a first memory for storing patterns of the three signals to be discriminated from the three binarization circuits; a second memory storing patterns of three reference signals, each of which is binarized in primary colors of red, green, and blue, regarding a reference article having substantially the same shape as the object to be measured; 3
The article is characterized by a discriminating circuit that outputs a discriminating signal when the three patterns of the signals to be discriminated and the patterns of the three reference signals from the second memory all match in the same primary colors. Color discrimination device.