Context: I am a PhD student in physics and right now I am studying phase retrieval with low illumination
With two different parameters I obtain these two images:
With hight illumination (less noise) and the same parameters I obtain:
The real object is pi. One parameter that I use to estimate the quality of the reconstruction is the Pearson coefficient with the real object.
Problem: I have the same correlation for the first pair of images (with low illumination) because the second one has less noise, but it has a worst resolution.
What is a parameter that describes the fact that, despite noise, the object is more recognizible in the first picture. I cannot take images with other objects, for example to evaluate spatial resolution for different parameters.