这个问题一般不会发生在伪hdr图像上(除非图像一开始就模糊了)，但是对于利用色调映射和多重图像获得的真hdr来说，这会是个大问题。

This generally isn't an issue with fake HDR images (unless the image is blurry to begin with), but it can be a big problem with real HDRs done with tone-mapping and multiple images.

youdao

提出了一种用任意分布的模拟随机源对一维分段线性映射的参数进行调制来获得真随机比特的方法。

This paper proposes one method of acquiring truly random bits by means of modulating the parameter of one-dimensional piecewise linear maps by arbitrarily distributed analogue random source.

youdao