Automatic Correction of Saturated Regions in Photographs using Cross‐Channel Correlation
Syed Zain Masood, Jiejie Zhu, Marshall F. Tappen · Computer Graphics Forum · 2009
Abstract Incorrectly setting the camera's exposure can have a significant negative effect on a photograph. Over‐exposing photographs causes pixels to exhibit unpleasant artifacts due to saturation of the sensor. Saturation removal typically involves user intervention to adjust the color values, which is tedious and time‐consuming. This paper discusses how saturation can be automatically removed without compromising the essential details of the image. Our method is based on a smoothness prior: neighboring pixels have similar channel ratios and color values. We demonstrate that high quality saturation‐free photos can be obtained from a simple but effective approach.