Figure 10From: Analyzing in situ gene expression in the mouse brain with image registration, feature extraction and block clusteringExamples of anatomical structure expression extraction. Gene expression images with hippocampus mask overlaid in blue. Corresponding genes are A. Abr, B. Aplp2, C. Aff2, D. App. For a given pixel intensity value I, expression values are calculated via (256-I)/256. The 75 percentile of expression values of all pixels in a mask are then used as the expression statistic.Back to article page