Image defect detection
First Claim
1. An apparatus to detect a defect in a printed image, the apparatus being to:
- receive, by a processor, first image data representing a printable image;
receive, by the processor, second image data representing a scanned image of the printable image printed in a printing operation;
determine, by the processor, a resolution of the scanned image, the resolution of the scanned image being variable based on a characteristic of the printing operation;
generate, by the processor, a reference image using the first image data, the reference image having a resolution corresponding to the determined resolution of the scanned image; and
determine, by the processor, whether a defect is present in the image printed in the printing operation based on a comparison of the reference image with the scanned image.
2 Assignments
0 Petitions
Accused Products
Abstract
Apparatus to detect a defect in a printed image and methods of detecting detects in a printed image are described. In some examples, a printing operation is initiated using image data to generate a printed image. The printed image is then scanned to generate a scanned image. A resolution of the scanned image is estimated, calculated or determined on the basis of a characteristic of the printing operation, and a reference image, having a resolution corresponding to the estimated, calculated or determined resolution, is generated from the image data. Whether defects are present in the printed image may be determined on the basis of a comparison of the reference image with the scanned image.
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Citations
17 Claims
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1. An apparatus to detect a defect in a printed image, the apparatus being to:
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receive, by a processor, first image data representing a printable image; receive, by the processor, second image data representing a scanned image of the printable image printed in a printing operation; determine, by the processor, a resolution of the scanned image, the resolution of the scanned image being variable based on a characteristic of the printing operation; generate, by the processor, a reference image using the first image data, the reference image having a resolution corresponding to the determined resolution of the scanned image; and determine, by the processor, whether a defect is present in the image printed in the printing operation based on a comparison of the reference image with the scanned image. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus to detect a defect in a printed image, the apparatus comprising:
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a processor to initiate a printing operation using image data to generate a printed image; and a scanner to scan the printed image to generate a scanned image; wherein the processor is to; determine a resolution of the scanned image, the resolution of the scanned image being variable based on a characteristic of the printing operation; generate a reference image using the image data, the reference image having a resolution corresponding to the determined resolution; and compare the reference image with the scanned image to determine whether a defect is present in the printed image. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method of detecting a defect in a printed image, the method comprising:
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initiating, by a processor, a printing operation using image data to generate a printed image; scanning, by a scanner, the printed image to generate a scanned image; determining, by the processor, a resolution of the scanned image, the resolution of the scanned image being variable based on a characteristic of the printing operation; generating, by the processor, a reference image from the image data, the reference image having a resolution corresponding to the determined resolution of the scanned image; and detecting, by the processor, a defect in the printed image based on a comparison of the reference image with the scanned image. - View Dependent Claims (15, 16, 17)
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Specification