JPS62154182A - Image processor - Google Patents

Abstract

PURPOSE:To lighten the complication of algorithm in constitution and post- processing by providing a drive part and plural exchangeable optical filters inputting light with any specific wave length in accordance with a recognition target. CONSTITUTION:An optical filter 2 having such a characteristic that it transmits only the light of a specific wave length with respect to respective parts alpha, betaand gamma of the target to be recognized, and reflects light with any other wave length is previously set. According to a command from an image processor main body part 4, the drive part 3 mechanically drives the optical filter corresponding to purposes so as to be positioned in the front of the lens of a television camera at the timing of a picture input. Due to the action of the optical filter 2 the light of the specific wave length is inputted to an image input device. Based on transmitted light from the filter, processing is executed, whereby the complication of algorithm is lightened to improve processing efficiency.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is applicable to products and products in the field of production technology such as manufacturing processes.
The present invention relates to an image processing device for inspecting, classifying, and positioning semi-finished products, parts, etc.

Including positioning of parts, semi-finished products, and products at various production sites such as conventional technology manufacturing processes and inspection processes.

The most common image processing method is starting to be widely used for purposes such as sorting, shape measurement, and visual inspection.
There are two types of image processing: binary image processing in which an image signal is binarized using a certain threshold value, and grayscale image processing in which black and white information is handled using a brightness signal (luminance). In addition, as a method other than this, there is color image processing that uses color information, and this uses a color camera to input color information and uses a color separation filter of three colors, R, G, and B, to process the incident light. A multi-tube color camera uses one image pickup tube for each of the three colors of light R-G and H to obtain a signal output, and a striped filter for R, G, B, etc. In single-tube color cameras and solid-state cameras, a filter called a filter is attached to the target of an image pickup tube to capture an image, and a certain signal is used as a reference, and an R-G-B signal is extracted based on the phase difference. A common method is to use a single-chip color camera or the like that uses R, G, and H filters for each pixel to obtain color signals in correspondence with a readout clock.

Problems to be Solved by the Invention However, the above-mentioned binarization processing and grayscale image processing that use luminance signals are often difficult to apply when the contrast between the background and the recognition target is weak, and color There are many objects that cannot be recognized without using information.

Conventionally, color image processing using a color camera as described above has been used to handle such color information. In many cases, it is not always possible to provide sufficient support, such as when it is desired to extract only information about a color (color) or its complementary color. Furthermore, the above-mentioned single-tube and single-plate color cameras have three R, G, and B pixels that make up one pixel in a black-and-white TV left camera, so their resolution is lower than that of a black-and-white TV right camera. It had the problem of becoming. Further, although the multi-tube color camera can provide the same resolution as the monochrome TV right camera, it has the problem of being expensive. In addition, the method of color processing the recognition target according to the spectral characteristics of R-G-H is a general color image processing method, but the most basic problem is that this R-G,
When processing each information of B, the spectral characteristics of R, G, and B themselves are the most general image information that does not take into account the color information of the recognition target itself, so the amount of information to be processed is enormous. However, there is a problem in that the algorithm becomes complex and the calculation time is likely to exceed the practical range.

Means for Solving the Problems In order to solve the above problems, the image processing apparatus of the present invention includes:
This device includes an optical filter section that has a plurality of optical filters that take into consideration the spectral characteristics of the recognition target itself in advance, and a drive section that mechanically drives the optical filter section.

Function The present invention is capable of changing the spectral characteristics of the recognition target itself by time-divisionally switching a plurality of optical filters using a drive unit and inputting light of a specific wavelength, taking into consideration the spectral characteristics of the recognition target itself in advance. Appropriate image information according to characteristics can be obtained, complexity of algorithms in configuration and post-processing can be reduced, and processing efficiency can be improved.

Example An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the basic structure of an image processing apparatus according to the present invention. In Figure 1, 1 is a TV left camera that inputs images to the main body of this image processing device. 2 is a set of multiple optical filters that transmit light of a specific wavelength and reflect light of other wavelengths. 2a is a side view and 2b is a front view of the optical filter section. 3 is the optical filter section 2
A drive unit 4 controls the TV left camera and the drive unit 3, and 4 controls the TV left camera and the drive unit 3.
1 is a main body of an image processing apparatus according to the present invention that performs various processes.

The operation of the image processing apparatus configured as described above will be described below with reference to FIGS. 1 to 3.

Now, for the purpose of classification etc., the recognition target 5 as shown in Figure 2 (a) is
shall be handled. At this time, it is difficult to recognize objects using conventional binarization processing when the brightness level at a certain vertical scanning position of 70 rows is low (0)) in Figure 2, where the contrast between the object and the background or between each part is small. is often the case. Therefore, in the image processing apparatus of the present invention, the black and white T
The V right camera is used to perform recognition processing using color information of each part of the recognition target. That is, an optical filter having characteristics as shown in FIG. 3 transmits light of a specific wavelength for each part α, β, and γ of the object 5 shown in FIG. 2 (-), and reflects light of other wavelengths ( -), (b), and (C) are set in the optical filter section 2 in advance. Next, according to a command from the image processing device main unit 4, the drive unit 3 drives the optical filter T according to the purpose in accordance with the timing of image input.
It is mechanically driven so as to be located in front of the V left camera lens, and by the action of an optical filter, light of a specific wavelength is input to the image processing device.

For example, if you want to cut out only the image of the recognition target part from the background, you can place a filter with the characteristics shown in Figure 3(C) on the left camera surface of the TV, and
Or, if the image in the β portion is a problem, a filter with the characteristics shown in Figure 3 (a) or (b) is positioned and subsequent processing is performed based on the transmitted light from the filter. It is.

Effects of the Invention As described above, the present invention includes an optical filter section in which a plurality of optical filters having transmission characteristics that take into consideration the spectral characteristics of the recognition target are set in the input section of an image processing device, and the optical filter section is mechanically driven. By switching the optical filter and inputting light of a specific wavelength, it is possible to obtain appropriate image information according to the spectral characteristics of the recognition target itself, making it easy to configure and post-process. It is possible to reduce the complexity of the algorithm and improve processing efficiency. In addition, since the image information after passing through the optical filter is basically the same as black and white information, conventional binarization processing circuits can be applied as is, and conventional image processing devices that handle black and white information can be used to process color information. It can be used as an image processing device. Another advantage is that even if the recognition target changes, it can be handled by replacing the optical filter. Furthermore, since a monochrome TV camera can be used, higher resolution can be obtained than with a single-tube color camera.

[Brief explanation of drawings]

FIG. 1(a) is a basic configuration diagram in an embodiment of the present invention,
FIG. 1(b) is a front view of the optical filter, and FIG. 2(a) is a front view of the optical filter. 3(b) is a diagram showing a front view and brightness level of a recognition target, and FIGS. 3(a), 3(b), and 3(c) are diagrams showing an example of transmission characteristics of an optical filter. 1...TV camera, 2...Optical filter unit, 3...Drive unit, 4...Image processing device main body. Name of agent: Patent attorney Toshio Nakao and 1 other person
l Figure 2 - Round can + l L9 Sheet Figure 2

Claims (1)

[Claims] It consists of a plurality of replaceable optical filters for inputting light of arbitrary specific wavelengths depending on the recognition target, and a drive unit that mechanically drives the optical filters, and switches the spectral distribution of the input light. An image processing device characterized in that it is configured to perform processing based on optical information of a specific wavelength extracted by.