AN IMPROVED HDR IMAGE PROCESSING USING FAST GLOBAL TONE MAPPING

Sajeena A, Sunitha Beevi K

Abstract: People always try to reconstruct images that look like original scene. But it is not succeeded up to the expected level because the display devices cannot accommodate the actual range of illumination. The original scene is having high dynamic range (HDR) and the display devices are having low dynamic range (LDR) of values. Tone mapping can be used to display HDR image in an LDR device. In this paper we are trying to develop a better tone mapping method. A number of images with different exposure are fused to form an HDR image.. Here we used average method for this which is the simplest one. Then by using tone mapping the HDR image is converted into LDR. We tried Tone Reproduction Curve (TRC) based global tone mapping. TRC method results faster operation The global tone mapping operator algorithm is simple and does not introduce ghosting. The image will also free from blur and halo like artifacts. We took log average of the images to keep the pixel values within limit.

Keywords: Image fusion, High dynamic range images, , Tone mapping. Low dynamic range image, global operator

DOI: https://doi.org/10.15623/ijret.2013.0212051