High dynamic range image sensing method for image sensing device
AssigneeNovatek Microelectronics Corp.
InventorsChi-Fan Liou, Wei Hsu
Life of this patent
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Abstract
A high dynamic range image sensing method for an image sensing device is provided. The high dynamic range image sensing method comprises: calculating a brightness sum value of a pixel block to obtain a long exposure value; calculating a brightness average value of the pixel block to obtain a short exposure value; calculating a block average value of a plurality of adjacent pixel blocks; obtaining a weight value according to the block average value; and outputting a high dynamic range pixel value of one pixel according to the long exposure value, the short exposure value and the weight value.
Claims6
A high dynamic range image sensing method for an image sensing device, comprising:
- calculating a brightness sum value of a pixel block to obtain a long exposure value;
- calculating a brightness average value of the pixel block to obtain a short exposure value;
- calculating a block average value of a plurality of adjacent pixel blocks;
- obtaining a weight value according to the block average value;
- and
- outputting a high dynamic range pixel value of one pixel according to the long exposure value, the short exposure value and the weight value;
- calculating a brightness average value of a plurality of divided pixel blocks in the pixel block to obtain the short exposure value of the pixel block;
- calculating a brightness sum value of the plurality of divided pixel blocks in the pixel block to obtain a long exposure value of the pixel blocks;
- detecting a plurality of adjacent pixel blocks directly adjacent to the pixel block;
- obtaining the weight value according to a brightness value of the at least one divided pixel block in the pixel block and a brightness value of the at least one divided pixel block in each of the adjacent pixel blocks;
- adjusting the long exposure value of the pixel block and the short exposure value of the pixel block according to the weight values;
- combining the adjusted long exposure value and the adjusted short exposure value to obtain adjusted pixel blocks.
Dependencies are inferred from the claim text.