Method and apparatus for image processing
AssigneeNokia Technologies Oy
InventorsZhuo Jiang, Xiaopeng Lu, Wei Zong, Lingnan Li
Life of this patent
Estimating the term…
Abstract
A method, corresponding apparatuses, and a non-transitory computer readable medium for image processing are provided. A method comprises selecting at least one reference point on a sensor illumination response curve in a sensor illumination response plane. The method further comprises determining at least one dominant color evaluation region in the sensor illumination response plane based on the at least one reference point. With the claimed inventions, color reproduction performance could be improved.
Claims12
A method, comprising:
- selecting at least one reference point on a sensor illumination response curve in a sensor illumination response plane;
- determining at least one dominant color evaluation region in the sensor illumination response plane based on the at least one reference point;
- dividing an image into a plurality of grids;
- evaluating whether at least some of the grids of the plurality of grids are associated with the at least one dominant color evaluation region based on a sensor red color response per sensor green color response, and a sensor blue color response per sensor green color response of each grid;
- determining that the image comprises the at least one dominant color if a number of grids that are associated with the at least one dominant color evaluation region satisfies a threshold;
- and
- adjusting, subsequent to determining that the image contains the at least one dominant color, the at least one dominant color in a UV color domain by fine tune parameters.
An apparatus, comprising:
- at least one processor;
- and
- at least one memory comprising computer program instructions,
- wherein the at least one memory and the computer program instructions are configured to, with the at least one processor, cause the apparatus at least to:
- select at least one reference point on a sensor illumination response curve in a sensor illumination response plane;
- determine at least one dominant color evaluation region in the sensor illumination response plane based on the at least one reference point;
- divide an image into a plurality of grids;
- evaluate whether at least some of the grids of the plurality of grids are associated with the at least one dominant color evaluation region based on a sensor red color response per sensor green color response, and a sensor blue color response per sensor green color response of each grid;
- determine that the image comprises the at least one dominant color if a number of grids that are associated with the at least one dominant color evaluation region satisfies a threshold;
- and
- adjust, subsequent to determining that the image contains the at least one dominant color, the at least one dominant color in a UV color domain by fine tune parameters.
A non-transitory computer readable medium having program code stored thereon, the program code configured to direct an apparatus, when executed, to:
- select at least one reference point on a sensor illumination response curve in a sensor illumination response plane;
- determine at least one dominant color evaluation region in the sensor illumination response plane based on the at least one reference point;
- divide an image into a plurality of grids;
- evaluate whether at least some of the grids of the plurality of grids are associated with the at least one dominant color evaluation region based on a sensor red color response per sensor green color response, and a sensor blue color response per sensor green color response of each grid;
- determine that the image comprises the at least one dominant color if a number of grids that are associated with the at least one dominant color evaluation region satisfies a threshold;
- and
- adjust, subsequent to determining that the image contains the at least one dominant color, the at least one dominant color in a UV color domain by fine tune parameters.
Dependencies are inferred from the claim text.