To make an S/N (signal to noise ratio) satisfactory and to reduce luminance inversion and color slurring at the time of compositing a high sensitive image signal and a low sensitive image signal to generate a composited image of a wide dynamic range.
When a weighted addition circuit 14 composites a high sensitive image signal H and a low sensitive image signal L obtained by imaging an object, composition is performed according to a composition expression: BC = k × H + (1 - k) × L (here, k is a composition parameter (0 ≤ k ≤ 1)). At this time, a k value determining part 19 determines the value of a composition parameter k from the high sensitive image signal H and the low sensitive image signal L for each pixel position and outputs the value to the weighted addition circuit 14.
FUJI FILM MICRODEVICES CO LTD
Hironori Honda
Toshimitsu Ichikawa
Takeshi Takamatsu
Yuriko Hamada