An improved HDR image synthesis algorithm
An improved HDR image synthesis algorithm
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一种改进的HDR图像合成算法
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
W. Philips
中科院分区：
文献类型：
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作者：
S. D. Neve;B. Goossens;H. Luong;W. Philips
在高动态范围（HDR）成像中，具有不同曝光时间的多张照片被组合成一个辐射度图，它反映了现实生活场景中的辐射度。这涉及到恢复成像过程的响应函数。由德贝维奇（Debevec）和马利克（Malik）提出的技术是一种著名的HDR图像合成算法，但计算复杂度相对较高，这限制了可能的图像尺寸和重建质量。在本文中，我们提出了一种用于估计相机响应函数（CRF）和辐射度图的改进联合优化技术，以及一种新的顺序两步优化技术，它首先估计CRF，然后重建辐射度图，从而在显著更短的计算时间内获得更好的视觉效果和更高的信噪比。
In high dynamic range (HDR) imaging, multiple photographs with different exposure times are combined into a radiance map, which reflects the radiance in real-life scenes. This involves recovering the response function of the imaging process. The technique proposed by Debevec and Malik is a well-known HDR image synthesis algorithm, but the computational complexity is relatively high, which limits the possible image size and the reconstruction quality. In this paper we present an improved joint optimization technique for estimating the camera response function (CRF) and the radiance map and a new sequential two-step optimization technique, which first estimates the CRF and then reconstructs the radiance map, resulting in better visual results and a higher SNR in remarkably less computation time.