Method for efficient compression and decoding of single sensor color image data
First Claim
Patent Images
1. A method for compressing color imagery from a single sensor of interleaved color primaries comprising:
- retrieving, from a memory buffer of an imaging device, an image plane including a plurality of pixel values of spatially-interleaved color primaries;
separating the spatially-interleaved color primaries into a plurality of independent color channels comprising at least a first independent color channel, a second independent color channel, and a third independent color channel, the first independent color channel and the second independent color channel representing the same color in different color planes, and the third independent color channel representing a different color than the first independent color channel and the second independent color channel;
encoding the difference between each pixel value in a first set of pixel values associated with the first independent color channel and a corresponding pixel value in a second set of pixel values associated with the second independent color channel into a compressed form;
encoding the sum of each pixel value in the first set of pixel values associated with the first independent color channel and the corresponding pixel value in the second set of pixel values associated with the second independent color channel into a compressed form;
multiplying a third set of pixel values associated with the third independent color channel by a factor of 2;
encoding the difference between each pixel value in the multiplied third set of pixel values and a corresponding sum of a first pixel value in the first set of pixel values and a second pixel value in the second set of pixel values into a compressed form; and
storing each of the compressed forms in a memory.
6 Assignments
0 Petitions
Accused Products
Abstract
A method is described to greatly improve the efficiency of and reduce the complexity of image compression when using single-sensor color imagers for video acquisition. The method in addition allows for this new image compression type to be compatible with existing video processing tools, improving the workflow for film and television production.
56 Citations
14 Claims
-
1. A method for compressing color imagery from a single sensor of interleaved color primaries comprising:
-
retrieving, from a memory buffer of an imaging device, an image plane including a plurality of pixel values of spatially-interleaved color primaries; separating the spatially-interleaved color primaries into a plurality of independent color channels comprising at least a first independent color channel, a second independent color channel, and a third independent color channel, the first independent color channel and the second independent color channel representing the same color in different color planes, and the third independent color channel representing a different color than the first independent color channel and the second independent color channel; encoding the difference between each pixel value in a first set of pixel values associated with the first independent color channel and a corresponding pixel value in a second set of pixel values associated with the second independent color channel into a compressed form; encoding the sum of each pixel value in the first set of pixel values associated with the first independent color channel and the corresponding pixel value in the second set of pixel values associated with the second independent color channel into a compressed form; multiplying a third set of pixel values associated with the third independent color channel by a factor of 2; encoding the difference between each pixel value in the multiplied third set of pixel values and a corresponding sum of a first pixel value in the first set of pixel values and a second pixel value in the second set of pixel values into a compressed form; and storing each of the compressed forms in a memory. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A system for compressing color imagery from a single sensor of interleaved color primaries comprising:
-
a retrieval module configured to retrieve, from a memory buffer of an imaging device, an image plane including a plurality of pixel values of spatially-interleaved color primaries; a color channel module configured to separate the spatially-interleaved color primaries into a plurality of independent color channels comprising at least a first independent color channel, a second independent color channel, and a third independent color channel, the first independent color channel and the second independent color channel representing the same color in different color planes, and the third independent color channel representing a different color than the first independent color channel and the second independent color channel; an encoder configured to; encode the difference between each pixel value in a first set of pixel values associated with the first independent color channel and a corresponding pixel value in a second set of pixel values associated with the second independent color channel into a compressed form; and encode the sum of each pixel value in the first set of pixel values associated with the first independent color channel and the corresponding pixel value in the second set of pixel values associated with the second independent color channel into a compressed form; multiply a third set of pixel values associated with the third independent color channel by a factor of 2; encode the difference between each pixel value in the multiplied third set of pixel values and a corresponding sum of a first pixel value in the first set of pixel values and a second pixel value in the second set of pixel values into a compressed form; and a storage module configured to store each of the compressed forms in a memory. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
Specification