Apparatus and method for processing image by wide dynamic range process

摘要

An apparatus and method for processing an image by a wide dynamic range (WDR) process, and for obtaining an image having a wide dynamic area by using a WDR process. The method includes: receiving a long exposure image and a short exposure image having different exposure times; detecting a motion artifact area that may be occur when the long exposure image and the short exposure image are fused; generating a non-linear gain control short exposure image by non-linearly adjusting a gain of the short exposure image such that a luminance component of the short exposure image corresponds to a luminance component of the long exposure image; compensating for motion in the non-linear gain control exposure image based on the detected motion artifact area; and fusing the non-linear gain control short exposure image and the long exposure image to output an image to which a WDR process is performed.

主权项

1. An image processing apparatus comprising:
an image input unit configured to receive a long exposure image and a short exposure image that have different exposure times; a motion artifact area detecting unit configured to detect a motion artifact area resulting from a fusion of the long exposure image and the short exposure image; a non-linear gain adjusting unit configured to calculate a gain value corresponding to a maximum color of each unit area of a color filter array pattern of the short exposure image based on a non-linear curve, generate a non-linear gain control short exposure image by non-linearly adjusting a gain of the received short exposure image, wherein the non-linear curve is generated by normalizing each area of a luminance component of the short exposure image to correspond to each area of a luminance component of the long exposure image, and the non-linear gain adjusting unit is further configured to compensate for motion in the generated non-linear gain control short exposure image based on the detected motion artifact area; and a fusing unit configured to fuse the non-linear gain control short exposure image and the long exposure image to output an image to which a wide dynamic range (WDR) process is performed.