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US 8,805,114 B2Granted
Content adaptive edge and detail enhancement for image and video processing
AssigneeTexas Instruments Incorporated
InventorFan Zhai
Life of this patent
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Abstract
A content-adaptive edge and detail enhancement method is described for image/video processing. Both 2D peaking and LTI/CTI are used in sharpening pictures. Image analysis is performed to generate a mask to control the use of the two peaking techniques. The strength or likelihood of edges or transitions is measured and such a strength or likelihood measurement will be transformed into a blending factor controlling the blending of the LTI/CTI and peaking outputs.
Claims5
A method of content adaptive edge and detail enhancement for image processing comprising the steps of:
- receiving input image;
- applying LTI (Luminance Transient Improvement) to the image;
- applying CTI (Chrominance Transient Improvement) to the image;
- applying 2 dimensional peaking to the image;
- analyzing the image to determine the type of edge transitions present in the image;
- creating a first mask to differentiate between strong and soft transitions present in the image;
- blending the LTI/CTI and peaking modified images according to said first mask;
- creating a second mask to differentiate between flat and busy areas of the image;
- adjusting the gain of the peaking computation according to said second mask to reduce gain of the peaking computation for flat areas of the image;
- applying negative coring to flat areas present in the image according to said second mask;
- outputting the modified image.
8 more elements
Dependencies are inferred from the claim text.