TY - JOUR
T1 - Photography enhancement based on the fusion of tone and color mappings in adaptive local region
AU - Wang, Te Hsun
AU - Fang, Chih Wei
AU - Sung, Ming Chian
AU - Lien, Jenn Jier James
N1 - Funding Information:
Manuscript received August 03, 2009; revised February 02, 2010; accepted May 13, 2010. Date of publication June 07, 2010; date of current version November 17, 2010. This work was supported by the National Science Council, Republic of China, Taiwan, under Contract NSC–99-2221-E-006-216. The associate editor coordinating the review of this manuscript and approving it for publication was Dr. Chih-Wei Fang.
PY - 2010/12
Y1 - 2010/12
N2 - Existing tone reproduction schemes are generally based on a single image and are, therefore, unable to accurately recover the local details and colors of scene since the limited available information. Accordingly, the proposed tone reproduction system utilizes two images with different exposures (one low and one high) to capture the local detail and color information of low- and high-luminance regions of scene, respectively. The adaptive local region of each pixel is developed in order to appropriately reveal the details and maintain the overall impression of scene. Our system implements the local tone mapping and color mapping based on the adaptive local region by taking the lowly-exposed image as the basis and referencing the information of highly-exposed image. The local tone mapping compresses the luminance range in the image and enhances the local contrast to reveal the details, while the local color mapping maps the precise color information from the highly-exposed image to the lowly-exposed image. Finally, a fusion process is proposed to mix the local tone mapping and local color mapping results to produce the output image. A multiresolution approach is also developed to reduce time cost. The experimental results confirm that the system generates realistic reproductions of HDR scenes.
AB - Existing tone reproduction schemes are generally based on a single image and are, therefore, unable to accurately recover the local details and colors of scene since the limited available information. Accordingly, the proposed tone reproduction system utilizes two images with different exposures (one low and one high) to capture the local detail and color information of low- and high-luminance regions of scene, respectively. The adaptive local region of each pixel is developed in order to appropriately reveal the details and maintain the overall impression of scene. Our system implements the local tone mapping and color mapping based on the adaptive local region by taking the lowly-exposed image as the basis and referencing the information of highly-exposed image. The local tone mapping compresses the luminance range in the image and enhances the local contrast to reveal the details, while the local color mapping maps the precise color information from the highly-exposed image to the lowly-exposed image. Finally, a fusion process is proposed to mix the local tone mapping and local color mapping results to produce the output image. A multiresolution approach is also developed to reduce time cost. The experimental results confirm that the system generates realistic reproductions of HDR scenes.
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U2 - 10.1109/TIP.2010.2052269
DO - 10.1109/TIP.2010.2052269
M3 - Article
C2 - 20529741
AN - SCOPUS:78649281411
SN - 1057-7149
VL - 19
SP - 3089
EP - 3105
JO - IEEE Transactions on Image Processing
JF - IEEE Transactions on Image Processing
IS - 12
M1 - 5482181
ER -