1 October 1981 Photographic Image Enhancement Using Chemical Treatment Techniques
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Methods of enhancing underdeveloped, underexposed, or low optical density regions of properly exposed silver halide images using chemical treat ment techniques are reviewed and discussed. These procedures consist of modifying the transmission or emission characteristics of the original negative. Transmission methods increase the effective optical density of the original image by deposition of chemicals at or on the original silver grains and are therefore destructive. Emission methods such as autoradiography and fluores-cence provide a nondestructive enhancement alternative to the transmission approach.
Richard R. Pettijohn, Richard R. Pettijohn, } "Photographic Image Enhancement Using Chemical Treatment Techniques," Optical Engineering 20(5), 205681 (1 October 1981). https://doi.org/10.1117/12.7972791 . Submission:

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