Figure 1
From: Unsupervised estimation of signal-dependent CCD camera noise
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1687-6180-2012-231/MediaObjects/13634_2011_Article_347_Fig1_HTML.jpg)
Calculation of slope and intercept of mixed photon/electronic noise from centroids of scatterplots calculated from blocks/ROIs of test image: scatterplot of homogeneous areas with regression line superimposed (dots size proportional to mass of clusters).