Sony Corporation

Noriyuki Ono

Hiromasa Ikeyama

Yoshiaki Nishide

Motohiro Nakasuji

Fumihiko Sudo

Motohiro Nakasuzi

An arithmetic processing section executes an arithmetic process on a flicker correction signal output from a flicker correction signal outputting section and corresponding to the flicker component contained in a video signal of each of specific periods and the video signal of each of the specific periods to form a corrected video signal of the specific period corrected for the flicker component of the specific period for the video signal of each of the specific periods formed as a succession of specific periods and containing a flicker component as supplied from a video signal generating section in response to a correction error signal of each of the specific periods supplied from a correction error detecting section.

Flicker correcting method, flicker correcting circuit, and imaging device using them

Even when the light intensity of the light source varies, the flicker correction can thus be made flexibly. The present invention provides a flicker correction method comprising the steps of predicting, from an image of a present flicker-corrected frame, a flicker of an image of a next frame to generate two types of flicker images having flickers different in level from each other added thereto, detecting a flicker component through comparison between the generated two types of flicker images and an image of an input next frame, generating a flicker correction value on the basis of the detected flicker component, and making flicker correction by adding the generated flicker correction value to an input image frame by frame.

Flicker correction method and device, and imaging device

Even in case the shutter speed is high, a flicker can be corrected accurately. A flicker correction method in which a flicker is corrected by predicting, from a present input frame image, a flicker component in an image of a next frame and adding a correction value to the next frame image on the basis of the predicted flicker component includes holding a plurality of flicker data, calculating the correction value by combining a plurality of flicker data together at a ratio set correspondingly to a shutter speed and frame rate, and adding the calculated correction value to the input image signal.

A flicker is corrected with consideration given to the influence of noises. The present invention provides a flicker correction method in which a flicker is corrected by subtracting a flicker correction signal from an image signal, the method including the steps of removing noise from the flicker-corrected image signal by passing the latter through a low-pass filter, generating a correction error signal from the noise-removed, flicker-corrected image signal and the image signal not yet flicker-corrected, removing the image signal not yet flicker-corrected by passing the latter through a low-pass filter, and generating a flicker correction signal from the noise-removed image signal and correction error signal.

Growing community of inventors

Kanagawa, Japan

Noriyuki Ono