| 摘要 |
The method comprises the steps of providing image signal output device (4); inputting a luminance component of image signal corresponding to a first position of object (1) photographed by the image signal output device (4); correcting the gamma-value of the luminance component corresponding to the first position; inputting a luminance component of image signal corresponding to second position (71) of the object (1) photographed by the image signal output device (4); correcting the gamma-value of the luminance component corresponding to the second position; computing the ratio between the luminance component corresponding to the first position after the gamma correction and the luminance component corresponding to the second position after the gamma correction; and displaying the ratio (72). |
