IMAGING DEVICE AND ENDOSCOPE APPARATUS INCLUDING THE SAME

摘要

An imaging device includes a light source capable of emitting multi-types of illumination light beams, an imaging unit including an imaging element driven by a rolling shutter method, a light source control unit, a frame image control unit, and an image generation unit. The frame image control unit controls the light source control unit and the imaging unit so as to obtain an output having a frame group, in which second exposure frames Exp2 and Exp4 are respectively disposed before and after a first exposure frame Exp3, as one period. The imaging signal generation unit generates an imaging signal according to illumination light using a ratio of a period from the exposure start timing of each horizontal pixel line to the switching timing of the illumination light and a period from the switching timing of the illumination light to the exposure end timing in the first and second exposure frames.

主权项

1. An imaging device, comprising:
a light source capable of emitting a plurality of types of illumination light beams having different spectra; an imaging unit including an imaging element in which a plurality of pixels are arrayed in a horizontal direction and a vertical direction and which includes a plurality of horizontal pixel lines formed by pixels arrayed in the horizontal direction and is driven by a rolling shutter method; a light source control unit that performs switching between the illumination light beams emitted from the light source; a frame image control unit that generates a first exposure frame, which is formed by a unit irradiation period in which one of the illumination light beams is emitted and a unit irradiation period in which different illumination light from the illumination light beam is emitted, and a second exposure frame, which is formed by a unit irradiation period in which one of the illumination light beams is emitted and a unit irradiation period in which no illumination light is emitted, and outputs a frame group, in which the second exposure frame is set before and after the one first exposure frame or the two continuous first exposure frames, as one period; and an imaging signal generation unit that generates an imaging signal amount, which is obtained from the pixels when the pixels are exposed using the same illumination light in the unit irradiation period, using a detection signal amount read from the pixels of each of the horizontal pixel lines in each exposure frame included in the frame group.