| 摘要 |
PROBLEM TO BE SOLVED: To immediately eliminate the adverse effect on a diagnosis, medical treatment, etc., by the occurrence of halation by forcibly lessening the light quantity control by a light quantity control means when discrimination is made that there is the occurrence of the local halation, thereby eliminating the occurrence of the local halation. SOLUTION: A histogram is developed in accordance with the luminance pixel signal for one frame component from an image pickup sensor in a histogram extracting means 64. A diaphragm 20 adjusts the light quantity of the light introduced to a scope 10 in accordance with the histogram. When the presence of the occurrence of the local halation is discriminated by a discriminating means for discriminating the presence or absence of the occurrence of the local halation from the histogram characteristics, the light quantity control by the light quantity control means is forcibly lessened and the occurrence of the halation is eliminated. As to the judgment of the presence or absence of the occurrence of the local halation, an operator for manipulating a keyboard 67 makes judgment by actually monitoring the video reproduction screen of a TV monitor device 40.
|
