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Contrast Enhanced Tone Mapping Operator for High Dynamic Range Image Based on Guided Image Filter
Xing Li(이은성),Seungwoo Wee(위승우),Jechang Jeong(정제창) 한국방송·미디어공학회 2018 한국방송공학회 학술발표대회 논문집 Vol.2018 No.6
In this paper, we propose a contrast enhancement algorithm using guided, image filter (GIF). The GIF is used, to divide an HDR image into a base layer and a detail layer. The energy scale of base layer determinate the darkness and brightness of the image. However, the detail information in the base layer is difficult to be displayed, because of the high brightness and clusters of low brightness. We propose a contrast enhancement method, by adjusting the gray level of base layer by subtracting the mean value of itself. It is combined, with the detail layer to preserve the detail information. Experiment results show that the proposed, algorithm has better performance in detail preservation and. contrast enhancement.