Local Histograms Example: MRI slice of the brain Global (all image: N M pixels) Rectangular ROI, including background Non-rectangular ROI’s (no background): o Full head (boundary at the skin) o Gray matter, white matter, all interior o White matter only o Gray matter only o Sample ROI’s o Uniform sample (K pixels) global histogram 1Jorge Marquez - CCADET UNAM 2012
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Sampling 25% of full pixel population 9Jorge Marquez - CCADET UNAM 2012
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