| 摘要 |
The present invention relates to a method for providing an estimation of a mean signal to noise ratio value for an output image comprising a number of pixels, wherein each pixel of the output image having a pixel value. The method comprising: providing an image histogram divided into bins, the image histogram comprising information regarding the distribution of pixel values among the pixels of the output image, each bin comprising a set of pixels having pixels values within a predetermined range; attributing a signal to noise ratio value for each bin of the image histogram; weighting, for each bin of the image histogram, the signal to noise ratio value of that bin with the number of pixels in the set of pixels of that bin; summing the weighted signal to noise ratio values of the bins; and dividing the sum of weighted signal to noise ratio values of the bins by the total number of pixels of the output image or the total number of pixels in the bins of the image histogram. The present invention also relates to a camera (1) arranged for providing an estimation of a mean signal to noise ratio value for an output image comprising a number of pixels wherein each pixel of the image having a pixel value. |
