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Globally Optimized Linear Windowed Tone Mapping

机译:全局优化的线性窗音映射

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This paper introduces a new tone mapping operator that performs local linear adjustments on small overlapping windows over the entire input image. While each window applies a local linear adjustment that preserves the monotonicity of the radiance values, the problem is implicitly cast as one of global optimization that satisfies the local constraints defined on each of the overlapping windows. Local constraints take the form of a guidance map that can be used to effectively suppress local high contrast while preserving details. Using this method, image structures can be preserved even in challenging high dynamic range (HDR) images that contain either abrupt radiance change, or relatively smooth but salient transitions. Another benefit of our formulation is that it can be used to synthesize HDR images from low dynamic range (LDR) images.
机译:本文介绍了一种新的色调映射运算符,该运算符可以在整个输入图像上的小重叠窗口上执行局部线性调整。虽然每个窗口都应用保留了辐射值单调性的局部线性调整,但该问题隐含地被视为满足每个重叠窗口上定义的局部约束的全局优化之一。局部约束采用指导图的形式,可用于在保留细节的同时有效抑制局部高对比度。使用这种方法,即使在具有挑战性的高动态范围(HDR)图像中也可以保留图像结构,这些图像包含突然的辐射度变化或相对平滑但明显的过渡。我们的配方的另一个好处是,它可以用于从低动态范围(LDR)图像合成HDR图像。

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