Video image enhancement method
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsHideyuki Nakamura, Tadanori Tezuka, Masao Hamada, Tsuyoshi Nakamura
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Abstract
There is provided is a method for enhancing a video image capable of achieving high image quality improvement for both a texture area and an edge area. A maximum limit value and a minimum limit value of a video signal value enhanced on the basis of a pixel signal value in an area set around the target pixel are calculated, the maximum limit value and the minimum limit value are corrected according to a texture value calculated as a scale value that indicates a variation of the pixel signal value in the corresponding area, and the corrected maximum limit value and minimum limit value are applied to the enhanced video signal value.
Claims3
A method for enhancing a video image for enhancing an outline in a video image by generating an outline enhancement signal as a function of a pixel signal value in an area set around each target pixel and applying the outline enhancement signal to the target pixel, the method comprising:
- calculating a maximum limit value and a minimum limit value of an enhanced video signal value on the basis of the pixel signal value in the area set around the target pixel;
- calculating a texture value as a scale value that indicates a variation of the pixel signal value in the area;
- correcting the maximum limit value and the minimum limit value according to the texture value;
- limiting the enhanced video signal value by the corrected maximum limit value and the minimum limit value;
- and
- giving the texture value as a value obtained by normalizing the value obtained by subtracting an absolute value of a difference in a number of times of increase and decrease from the sum of the number of times of increase and decrease of the pixel signal value so that the maximum value becomes 1.
Dependencies are inferred from the claim text.