Image correction method for uneven cloth speed of automatic cloth inspection machine based on quadratic interpolation method

A secondary interpolation and image correction technology, which is applied to the correction of image distortion caused by uneven cloth movement of automatic cloth inspection machine, corrects image distortion caused by uneven cloth movement of automatic cloth inspection machine, and uneven cloth movement speed of automatic cloth inspection machine In the field of image correction, it can solve the problems of increasing false detection rate and missed detection rate, changing the shape characteristics of defects, changing the normal texture shape of fabrics, etc., achieving the effect of small memory consumption, low computer computing load, and correcting image distortion.

Active Publication Date: 2018-10-23
DONGHUA UNIV
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Problems solved by technology

[0005] The stretching distortion of the fabric surface image not only changes the normal texture shape of the fabric, but also changes the appearance characteristics of the defects, which makes it difficult to identify and classify the defects, thus increasing the false detection rate and missed detection rate

Method used

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  • Image correction method for uneven cloth speed of automatic cloth inspection machine based on quadratic interpolation method
  • Image correction method for uneven cloth speed of automatic cloth inspection machine based on quadratic interpolation method
  • Image correction method for uneven cloth speed of automatic cloth inspection machine based on quadratic interpolation method

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Embodiment Construction

[0040] The present invention will be further described below in combination with specific embodiments. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0041]According to the image correction method of the uneven cloth speed of the automatic cloth inspection machine based on the quadratic interpolation method of the present invention, during the cloth inspection, the camera line scans to obtain the fabric image and converts it into a grayscale image. The specific steps are as follows:

[0042] (1) if figure 1 As shown, the line scan camera 1 scans the fabric to obtain ...

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Abstract

The invention relates to a quadratic interpolation based correction method for an automatic cloth inspecting machine with a non-uniform cloth travel speed. The method is used for correcting image distortion caused by the non-uniform cloth travel speed of the automatic cloth inspecting machine. The method comprises the steps of dividing row sampling lines at equal intervals in a warp direction on a fabric plane corresponding to an image according to the cloth travel speed set by a system as row sampling lines for image correction; and according to a spatial relationship between a corrected sampling point on the fabric plane and an original sampling point, obtaining a gray value of each pixel on the corrected image by adopting a quadratic interpolation method. The method is low in required calculation load and low in memory consumption, can be applied to real-time processing, and is used for subsequent defect identification and processing of the automatic cloth inspecting machine.

Description

technical field [0001] The invention belongs to the technical field of automatic cloth inspection, and relates to a correction method for image distortion caused by uneven cloth running of an automatic cloth inspection machine, in particular to an image correction method for uneven cloth running speed of an automatic cloth inspection machine based on a secondary interpolation method. Correct the image distortion caused by the uneven running of the automatic cloth inspection machine. Background technique [0002] At present, the detection of fabric defects is mostly done by traditional manual detection methods, which are limited by the subjective factors of the inspectors and some objective factors. low efficiency. With the rising cost of labor, the demand for automatic cloth inspection equipment is increasing. Foreign companies such as BARCO and Swiss Uster have launched commercialized automatic cloth inspection machines, but due to high prices and variety adaptability pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
CPCG01N2021/8909G06T5/006G06T7/0006G06T2207/30132
Inventor 万贤福陈俊琰汪军李立轻陈霞
Owner DONGHUA UNIV
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