Volume 20, Issue 3 (JIAEEE Vol.20 No.3 2023)
Journal of Iranian Association of Electrical and Electronics Engineers 2023, 20(3): 35-45 |
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rahimi A, Moradi M. Adapting parameters of bilateral filter for tone mapping of high dynamic range images. Journal of Iranian Association of Electrical and Electronics Engineers 2023; 20 (3) :35-45
URL: http://jiaeee.com/article-1-1428-en.html
URL: http://jiaeee.com/article-1-1428-en.html
Department of Communication Systems, Faculty of Engineering, The Islamic Republic of Iran Broadcastin University (IRIBU), Tehran
Abstract: (735 Views)
This research proposes an appropriate tone mapping approach to obtain images with low dynamic range or LDR from images with high dynamic range or HDR. The proposed method uses a type of adaptive bilateral filter, where the spatial and range similarity parameters of the filter are determined separately for all pixels through the gradient map. By assigning larger similarity parameters to the pixels of the flat areas compared to the pixels of the non-flat or edge areas, the proposed filter is able to more accurately match the extreme changes of the pixels of the HDR images to reduce the effect of the bright pixels of HDR images on the adjacent dark areas and prevent halos in corresponding LDR images. Also, to prevent the possible distortion of the color components in the tone mapping operation, the V channel of the HSV color space has been used. To speed up the operation, the accelerated example of the proposed adaptive bilateral filter has been used. The results of this research confirm the effectiveness of the proposed algorithm in producing high-quality LDR images as well as the acceptable execution time compared to similar algorithms.
Keywords: High dynamic range (HDR), Low dynamic range (LDR), Tone mapping, Adaptive bilateral filter, HSV
Type of Article: Research |
Subject:
Communication
Received: 2022/01/18 | Accepted: 2022/11/6 | Published: 2023/05/24
Received: 2022/01/18 | Accepted: 2022/11/6 | Published: 2023/05/24
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