Abstract
Prints containing the maximum amount of micrograph detail are the objective of all microscopists. Due to the limited dynamic range of printing papers (Fig. 1), much darkroom time is spent in printing wide tonal-range micrographs that require contrast manipulation. We have applied the technique of unsharp masking to simplify contrast reduction and developed a process that yields significantly better results in a shorter time than the conventional method of dodging and burning. Spiegler and Juris's early works in unsharp masking have been applied by various researchers to aerial mapping, graphic arts, astronomy, and, to a limited extent, to electron micrographs. We have built upon this work and developed a simple procedure for using unsharp masking and studied the quantitative effects of its use in dynamic range control and image enhancement.
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