Method and apparatus for detection and removal of scanned image scratches and dust
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United States of America Patent
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N/A
Issued Date -
Feb 27, 2003
app pub date -
Aug 24, 2001
filing date -
Aug 24, 2001
priority date (Note) -
Abandoned
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Abstract
To avoid generating visible artifacts in the image, such as those generated when mildly defective areas are not identified, a system and method for identifying and correcting defects in a digital image including adjusting the pixel values of pixels surrounding the defective pixels are disclosed. The method for correcting defects in a input digital image comprises the steps of identifying the defects to form at least one defect map, generating a region of interest for each defect map, correcting the values of the pixels in each defect map, and adjusting the values of the pixels in each region of interest. In one embodiment, the input digital image is filtered with a median filter to generate a filtered image. A difference image is generated by subtracting the filtered image from the input digital image, and the pixels at which the difference image pixel value exceeds a given threshold are identified as defect pixel locations. The defect maps are comprised of adjoining defect pixel locations. The pixel values at the defect pixel locations are replaced with the corresponding filtered image pixel values. A smoothing operation is applied to obtain the adjusted value of the pixels in each region of interest corresponding to each defect map. User input is utilized to further mitigate the effects of uncertainty in defect identification.
First Claim
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- 15 United States
- 10 France
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- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
POLAROID CORPORATION (FMR OEP IMAGING OPERATING CORP ) | 1265 MAIN STREET WALTHAM MA 02451 |
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Robins, David R | Newton, MA | 4 | 97 |
Ye, Jong Chul | Framingham, MA | 32 | 454 |
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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