Image denoising in SDR HDR image conversion

摘要

Describes a method and system for image noise cancellation in displaying a high dynamic range image.Input images in the first dynamic rangeGiven an input reverse reconstruction function for mapping the codeword from the first dynamic range to the second dynamic rangeEqual to the first dynamic rangeHigher than that)Based on the input image and the input reverse reconstruction functionGenerate statistical dataThe input inverse reconstruction function is applied to the input image to estimate the risk of noise artifacts in the target image in the second dynamic range generated.The variance in the codeword bin (referred to as time histogram variance) in the histogram of successive input frames is used to generate a modified inverse reconstruction function.The modified inverse reconstruction function removes or reduces the noise artifacts in the target image when it is applied to the input image and generates a target image.