2026-04-13T07:21:34Zhttps://recercat.cat/oai/request

oai:recercat.cat:10230/416902025-12-20T16:55:43Zcom_2072_6col_2072_452952

00925njm 22002777a 4500 dc Bertalmío, Marcelo author Levine, Stacey author 2019-06-03T13:20:31Z 2019-06-03T13:20:31Z 2013 When taking pictures of a dark scene with artificial lighting, ambient light is not sufficient for most cameras to obtain both accurate color and detail information. The exposure bracketing feature usually available in many camera models enables the user to obtain a series of pictures taken in rapid succession with different exposure times; the implicit idea is that the user picks the best image from this set. But in many cases, none of these images is good enough; in general, good brightness and color information are retained from longer-exposure settings, whereas sharp details are obtained from shorter ones. In this paper, we propose a variational method for automatically combining an exposure-bracketed pair of images within a single picture that reflects the desired properties of each one. We introduce an energy functional consisting of two terms, one measuring the difference in edge information with the short-exposure image and the other measuring the local color difference with a warped version of the long-exposure image. This method is able to handle camera and subject motion as well as noise, and the results compare favorably with the state of the art. The first author acknowledges partial support by AACC project, reference TIN2011-15954-E, and by the ERC Starting Grant “Image Processing for Enhanced Cinematography.” The second author is funded in part by NSF-DMS #0915219. Color transfer Image denoising Image fusion Variational methods Variational approach for the fusion of exposure bracketed pairs