G - Physics – 03 – C
Patent
G - Physics
03
C
96/259
G03C 5/06 (2006.01) G03C 5/02 (2006.01) G03C 7/04 (2006.01)
Patent
CA 1099560
S P E C I F I C A T I O N "Photographic Process for the Production of Pictures of Increased Contrast" ABSTRACT OF THE DISCLOSURE In order to increase the contrast of a picture such as an X-ray picture over a selected range of densities, a negative transparency of the original picture of selected density value at one end of the selected range and a positive transparency of the original picture at the other end of the selected range are superimposed to form a transparency sandwich and the image produced by illuminating such a transparency sandwich is photographed or displayed. A number of selected density ranges may be superimposed on a single display by making a respective transparency sandwich for each range in a different colour and superimposing such transparency sandwiches. - 1 -
272124
Mcfadden Fincham
Stb Strahlentechnische Bilddiagnostik Heinz Fleck
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