Method and system for detecting image defects
First Claim
1. A method for identifying defects in a first image among a series of images, comprising:
- identifying a first portion of the first image at a first location in the first image, wherein a brightness of the first portion is different from a second portion at the first location in a previous image and a third portion at the first location in a subsequent image, by an amount exceeding a first threshold value;
determining whether a first region of the first image that includes the first portion, matches a second region of the previous image and a third region of the subsequent image, wherein the second and third regions are at second and third locations displaced from the first location; and
characterizing the first portion as a defect when the first region does not match the second and third regions.
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Abstract
An exemplary method includes identifying defects in a first image among a series of images, by identifying a first portion of the first image at a first location in the first image, wherein a brightness of the first portion is different from a second portion at the first location in a previous image and a third portion at the first location in a subsequent image, by an amount exceeding a first threshold value, determining whether a first region of the first image that includes the first portion, matches a second region of the previous image and a third region of the subsequent image, wherein the second and third regions are at second and third locations displaced from the first location, and characterizing the first portion as a defect when the first region does not match the second and third regions.
30 Citations
20 Claims
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1. A method for identifying defects in a first image among a series of images, comprising:
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identifying a first portion of the first image at a first location in the first image, wherein a brightness of the first portion is different from a second portion at the first location in a previous image and a third portion at the first location in a subsequent image, by an amount exceeding a first threshold value; determining whether a first region of the first image that includes the first portion, matches a second region of the previous image and a third region of the subsequent image, wherein the second and third regions are at second and third locations displaced from the first location; and characterizing the first portion as a defect when the first region does not match the second and third regions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 18)
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12. A machine readable medium comprising a computer program for causing a computer to perform:
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identifying a first portion of a first image among a series of images at a first location in the first image, wherein a brightness of the first portion is different from a second portion at the first location in a previous image and a third portion at the first location in a subsequent image, by an amount exceeding a first threshold value; determining whether a first region of the first image that includes the first portion, matches a second region of the previous image and a third region of the subsequent image, wherein the second and third regions are at second and third locations displaced from the first location; and characterizing the first portion as a defect when the first region does not match the second and third regions. - View Dependent Claims (13, 14, 15, 16, 17)
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19. A system for identifying defects in a first image among a series of images, comprising:
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a memory for storing the series of images; and a processor for identifying a first portion of the first image at a first location in the first image, wherein a brightness of the first portion is different from a second portion at the first location in a previous image and a third portion at the first location in a subsequent image, by an amount exceeding a first threshold value, determining whether a first region of the first image that includes the first portion, matches a second region of the previous image and a third region of the subsequent image, wherein the second and third regions are at second and third locations displaced from the first location, and characterizing the first portion as a defect when the first region does not match the second and third regions. - View Dependent Claims (20)
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Specification