Enhancing digital photography
First Claim
Patent Images
1. A method for enhancing imaging in low light conditions, the method comprising:
- acquiring a sequence of two or more images comprising at least a long image relating to long exposure time and a short image relating to short exposure time;
processing the sequence of two or more images by;
identifying at least one image zone of the sequence of two or more images having corresponding image levels between the long image and the short image upon gray level alignment;
filtering the short image and the long image to identify image edges in the short image and the long image generating a filtered short image and a filtered long image;
based on the identified image edges, masking the filtered short image and the filtered long image to identify high activity regions of the short image and the long image;
based on the masking, identifying high resolution areas of the filtered short image and generating an image combination mask; and
reconstructing a final image by combining the long image and the short image with the image combination mask.
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Abstract
A method for enhancing imaging in low light conditions. The method comprises acquiring two or more images, long images relating to long exposure times and a short images relating to short exposure times; processing the images to separate zones with high image details from zones of low image details; and reconstructing a final image where image information is selected from the short image in zones with high image details and from the long image in zones with low image details.
21 Citations
20 Claims
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1. A method for enhancing imaging in low light conditions, the method comprising:
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acquiring a sequence of two or more images comprising at least a long image relating to long exposure time and a short image relating to short exposure time; processing the sequence of two or more images by; identifying at least one image zone of the sequence of two or more images having corresponding image levels between the long image and the short image upon gray level alignment; filtering the short image and the long image to identify image edges in the short image and the long image generating a filtered short image and a filtered long image; based on the identified image edges, masking the filtered short image and the filtered long image to identify high activity regions of the short image and the long image; based on the masking, identifying high resolution areas of the filtered short image and generating an image combination mask; and reconstructing a final image by combining the long image and the short image with the image combination mask. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An image processing device comprising:
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a sensor; a memory; a processor in communication with the memory and the sensor, the processor being operable to; acquire a sequence of two or more images comprising a plurality of image zones from the sensor, the sequence of two or more images comprising at least a long image relating to a long exposure time and a short image relating to a short exposure time; identify at least one image zone of the sequence of two or more images having corresponding image levels between the long image and the short image upon gray level alignment; filter the short image and the long image to identify image edges in the short image and the long image generating a filtered short image and a filtered long image; based on the identified image edges, mask the filtered short image and the filtered long image to identify frequency content above a predetermined threshold; based on the masking, identify high resolution areas of the filtered short image and generate an image combination mask; compare the filtered short image and the filtered long image to identify regions of local motion; and reconstruct a final image with the image combination mask, wherein image information is selected from the short image in said at least one identified image zones with frequency content above the predetermined threshold and from the long image in other zones. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification