Figure 2
From: Determining optimal medical image compression: psychometric and image distortion analysis
Analysis of “acceptable image” crossover point. A. Histogram of n = 320 crossover points from 8 readers, displayed in bins 5 JPEG Q points wide (hatched bars, mean = 23.1 ± 7.0), with a Gaussian curve fit to the data (solid line, mean = 23 ± 8.1). B. Crossover points according to subject. Subjects (1–8) are displayed on the x axis; each data point shows the crossover point for each of the 40 image stacks shown to each subject. Solid horizontal lines show the mean crossover point for each subject.