JPH05242221A - Method for constituting inspection picture data base of building material - Google Patents

Abstract

PURPOSE:To cope with constitution of a data base with a small-capacity memory and to simplify the retrieval work during preservation by classifying inspection picture data into plural items and compressing pictures to store them. CONSTITUTION:Inspection picture data from picture processors 3A and 3B are stored in a memory 5 through a host computer 4. In this case, the host computer 4 takes in inspection picture data and classifies these inspection picture data to prescribed items. For example, in the case of the existence of a break of a 'Colorbest-M(R)' in inspection picture data, the break is extracted as the feature quantity, and an optimum classification directory (register address) of the memory 5 is selected by this feature quantity. Further, inspection picture data is subjected to picture (data) processing and is stored and reserved in the pertinent classification directory of the memory 5, thus constituting the data base.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection image database for building materials used to determine whether or not there is a lack of building materials such as roofing materials and wall materials manufactured in a fixed shape such as color vests and roof tiles. Regarding the construction method.

[0002]

2. Description of the Related Art Generally, in a manufacturing process of building materials, for example, color vests, an operator visually checks the color vests sequentially conveyed at a rate of about 40 m / min to determine whether or not there is a chip. It is extremely inefficient. Therefore, recently, the conveyed color vest is photographed by a photographing device, for example, a CCD camera, and the image from the CCD camera is image-processed by an image processing device, and the number of pixels forming the color vest image ( A method has been developed in which the area is compared with a reference number of pixels (reference area) to automatically determine the presence or absence of a chip.

[0003]

By the way, in such an inspection, if the inspection image data is divided into a database for each inspection line or each type of chip, it is possible to analyze the cause of the defect statistically, It is useful as a material when the analysis results are fed back to the building material manufacturing process to strengthen the quality assurance system. However, conventionally, since the image data at the time of inspection is simply stored as it is, a large-capacity memory is required to construct the inspection image database. That is, the inspection image data has a very large data capacity, for example, one inspection image data needs a capacity of 512 × 512 = 262144 bytes, and one floppy disk can store only five image data. Therefore, it is the current situation that inspection image data cannot be efficiently stored and retrieved.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method for constructing an inspection image database of a building material, which allows inspection image data to be stored / stored in a small-capacity memory and can be easily searched. Has an aim.

[0005]

In order to achieve the above object, the present invention provides a method for processing an image from a photographing device for photographing a building material conveyed in one direction to determine whether or not the building material is chipped. The inspection image data is classified into a plurality of predetermined items, and the image is compressed and stored in the memory for each corresponding item.

[0006]

With the above construction, the inspection image data is classified into a plurality of items, and the images are compressed and stored. Therefore, a small-capacity memory can be used, and the search operation during storage can be easily performed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic explanatory view of a building material defect determination inspection process to which a method of constructing a building material inspection database according to an embodiment of the present invention is applied.

In FIG. 1, reference numeral 1 (1A, 1B) denotes a plurality of lines of conveying bodies for conveying the color vest M as a building material in one direction at a constant speed, for example, a belt conveyor, 2
(2A, 2B) are CCD cameras as a plurality of photographing devices for photographing the color vests M on both the conveyors 1. An image processing device 3 (3A, 3B) processes the image from each CCD camera 2 and compares the number of pixels with the reference number of pixels to determine whether or not the color vest M is missing.

The inspection image data from each image processing apparatus 3 is stored in the memory 5 via the host computer 4. In this case, the host computer 4 takes in the inspection image data as shown in FIG. 2 (step S1) and classifies the inspection image data into predetermined items. For example, in the inspection image data in which the color best M has a defect, the defect is extracted as a feature amount (step S2),
The optimum classification directory (registered address) of the memory 5 is selected from this feature amount (step S3). Further, the inspection image data is image (data) compressed and stored / stored in a corresponding classification directory of the memory 5 to construct a database. The items of the image data are not limited to those based on the missing feature amount, and it is preferable to classify the defective products of the color vest M for each inspection line or each date in parallel.

As described above, when the database is constructed, the inspection image data is classified into a plurality of items, and the image is compressed and stored. Therefore, the number of bits is reduced, and the memory 5 having a small capacity can store the data. be able to. Further, when it is desired to read out the inspection image data and analyze the yield after storing the inspection image data, the inspection image data can be expanded so that the retrieval can be easily performed.

[0011]

As described above, according to the present invention, the inspection image data for determining the presence / absence of a chip in the building material is classified into a plurality of predetermined items, and the image is compressed and stored in the corresponding item. As a result, the increase in memory capacity is suppressed, and inspection image data can be searched and analyzed efficiently,
It is possible to establish a high quality assurance system.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram of a building material defect determination inspection process to which a method for building a building material inspection database according to an embodiment of the present invention is applied.

FIG. 2 is a block diagram showing an example of a method of constructing a database of inspection images.

[Explanation of symbols]

 2A, 2B Imaging device 3A, 3B Image processing device 5 Memory

Claims (1)

[Claims] 1. Inspection image data is classified into a plurality of predetermined items when an image from a photographing device that photographs a building material conveyed in one direction is processed to determine whether or not the building material has a chip, and the image is classified into a plurality of predetermined items. A method for constructing an inspection image database of a building material, which is characterized by compressing and storing each corresponding item in a memory.