Real-time automated scene display for infrared cameras

Details Real-time automated scene display for infrared cameras Real-time automated scene display for infrared cameras

1991-07-09

1993-09-28

Mancuso, Joseph

Image analysis

Histogram processing

For setting a threshold

250330, 382 18, 382 54, 382 56, G06K 938

Patent

active

052492419

ABSTRACT:
A histogram projection system which automatically optimizes, tracks changes in luminance and adjusts in real time the display of wide dynamic range imagery from IR cameras. It is computationally simpler than and offers markedly superior results to the standard available technique for this purpose, histogram equalization. The new technique assigns display dynamic range equally to each occupied intensity level in the raw data in contrast to the old procedure which assigns dynamic range in proportion to the number of pixels at given levels. Less shot noise and greater resolution of image detail for smaller objects or targets are the main improvements from the new algorithm. By the expedient of undersampling the image pixels in carrying out the histogram processing, one can in effect gradually increase the degree of dynamic range assigned to majority or background pixel levels, thereby enhancing the contrast in background regions when desired.

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