A Survey of image enhancement with Local Tone mapping for HDR Images
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Abstract
Contrast enhancements improve the perceptibility of objects in the scene by enhancing the brightness difference between objects and their backgrounds. Contrast Enhancement is a technique of improving the quality of image so that the brightness of the image is preserved. There are number of techniques are used for enhancing contrast quality of image but contrast enhancement of HDR images is difficult to achieve. Here in this paper a survey of all the techniques for the improvement of the brightness of the image is given. Also the techniques implemented for the tone mapping is given in the paper, so that by analyzing the related work an efficient technique is proposed in the future for the image brightness or contrast enhancement.
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Keywords: Tone mapping, HDR images, Exposure value, LDR, soft thresholding, hard thresholding.
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