Ceramic tile color difference detection and grading method based on feature point neighborhood color analysis
The invention provides a ceramic tile color difference detection and grading method based on feature point neighborhood color analysis. The method comprises the following steps: 1, carrying out image preprocessing on a template ceramic tile image and a to-be-detected ceramic tile image; 2, carrying...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention provides a ceramic tile color difference detection and grading method based on feature point neighborhood color analysis. The method comprises the following steps: 1, carrying out image preprocessing on a template ceramic tile image and a to-be-detected ceramic tile image; 2, carrying out segmentation by adopting a Canny edge detection operator ; 3, inputting the segmented template ceramic tile image and the to-be-detected ceramic tile image into the trained U-net3+ network; 4, respectively carrying out feature point detection on the ceramic tile bodies in the segmented template ceramic tile image and the to-be-detected ceramic tile image; 5, respectively calculating the mean value of each template ceramic tile and the ceramic tile to be detected in the CIELAB color space; and 6, setting a threshold value Th, calculating a color difference value [delta]Ei between the to-be-detected ceramic tile and each grade of template ceramic tile by using a CIEDE2000 color difference formula, and classifying |
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