Determine min & max intensity value from histogram.

How do you determine the minimum and maximum intensity value from looking at the histogram?

Answer 1

[Walter Roberson]

The minimum intensity value is somewhere in the range covered by the first bin with a non-zero count. The maximum intensity value is somewhere in the range covered by the last bin with a non-zero count. You cannot determine the precise values unless your inputs were quantized and your bins hold only a single quantum (e.g., distinct integers.)

[Esther]

what does non-zero count means?

[Image Analyst]

[counts binValues] = hist(yourArray, numberOfBins);
minBinValue = find(counts>0, 1, 'first');
maxBinValue = find(counts>0, 1, 'last');