摘要 |
The gradation correction of input video signals (11R, 11G, 11B) is conducted in the gradation correctors (14R, 14G, 14B) based on the lookup table data (LUTR, LUTG, LUTB). The cumulative histograms of the input video signals (11R, 11G, 11B) are generated in the cumulative histogram generators (32R, 32G, 32B) to set highlight points and shadow points. Based on the highlight and shadow points, the standard lookup table data stored in the standard lookup table storage (36) is converted into lookup table data (LUTR, LUTG, LUTB) associated with the input video signals (11R, 11G, 11B) and outputted to the gradation correctors (14R, 14G, 14B). According to this method, an appropriate gradation correction can be achieved depending on the input video signals (11R, 11G, 11B). The standard lookup table storage (36) need only be loaded with the standard lookup table data, namely, a great volume of lookup table data need not be stored.
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申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
TATSUMI, SESTUJI FUJI PHOTO FILM CO., LTD.;SHIOTA, KAZUO FUJI PHOTO FILM CO., LTD.;URABE, HITOSHI FUJI PHOTO FILM CO., LTD.;SHIMAZAKI, OSAMU FUJI PHOTO FILM CO., LTD. |