Patent ID: 8279303

Claim:
An imaging apparatus comprising: an imaging sensor; a control unit configured to control capturing a first image by the imaging sensor adjusted to a first charge accumulation time and capturing a second image by the imaging sensor adjusted to a second charge accumulation time, the first charge accumulation time not causing a flicker in an image captured by the imaging sensor under a light source blinking at a first blink cycle, the second charge accumulation time being different from the first charge accumulation time and causing a flicker in a captured image under the light source blinking at the first blink cycle; a flicker detection unit configured to detect a flicker occurrence in the first image or the second image based on a difference in luminance between the first image and the second image; and a difference image generation unit configured to generate a difference image between the first image and the second image. wherein the second charge accumulation time is synchronized with a second blink cycle of the light source and does not cause a flicker in a captured image under the light source blinking at the second blink cycle, and wherein the flicker detection unit detects which of the first image and the second image a flicker is generated in according to at least one of both a fluctuation period and a fluctuation frequency of pixel values of the difference image in a vertical direction to a scanning direction of the first image and the second image.