IMAGE PROCESSING DEVICE, IMAGE PROCESSING METHOD, AND IMAGE PROCESSING CIRCUIT

• Main Authors: FUJINAMI NOBUTOSHI, OTA YOSHITO, FURUMIYA SHIGERU
• Format: Patent
• Language: English; Japanese
• Published: 19.04.2018
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

PROBLEM TO BE SOLVED: To provide an image processing device that reduces shakes in an image and achieves high quality in combining a plurality of images taken at different exposure time.SOLUTION: An image processing device 10 for combining a first image and a second image taken at two or more exposure times with different length in parallel within one frame time includes: a level adjustment unit 100 for adjusting the first image and outputting a corrected first image adjusted to nearly the same brightness level as the second image; a movement detection unit 110 for calculating an absolute value of difference between pixel values between pixels at the same position of the corrected first image and the second image, accumulating the calculated absolute values by the image block, and thereby finding a movement detection amount by the image block; a movement blend ratio calculation unit 120 for smoothing the movement detection amount, and calculating a movement blend ratio between pixels at the same position on the basis of the smoothed movement detection amount; and an image combination unit 130 for generating a movement adaptive image by combining the pixels at the same position using the movement blend ratio.SELECTED DRAWING: Figure 1 【課題】異なる露光時間で撮影された複数の画像の合成において、画像内のブレを低減した高画質を実現する画像処理装置を提供する。【解決手段】１フレーム時間内で並行する長さの異なる２以上の露光時間で撮影された第１画像及び第２画像を合成する画像処理装置１０は、第１画像を調整して第２画像の輝度レベルと略合わせた補正第１画像を出力するレベル調整部１００と、補正第１画像及び第２画像の同位置画素間の画素値の差分の絶対値を算出し、算出した絶対値を画像ブロック毎に累算することで画像ブロック毎の動き検出量を求める動き検出部１１０と、動き検出量を平滑化し、平滑化した動き検出量に基づいて同位置画素間の動きブレンド比率を算出する動きブレンド比率算出部１２０と、動きブレンド比率で同位置画素どうしを合成することで動き適応画像を生成する画像合成部１３０とを備える。【選択図】図１