Image processor for processing source pixel intensity values

Details Image processor for processing source pixel intensity values Image processor for processing source pixel intensity values

1990-12-11

1992-12-08

Mancuso, Joseph

Image analysis

Histogram processing

For setting a threshold

340793, 358466, 23 2, G06K 938

Patent

active

051704439

ABSTRACT:
Saturation problems are alleviated, when displaying image data on a device capable only of displaying pixel intensity values between a minimum value (Imin) and a maximum value (Imax), by smoothly mapping source intensity values greater than a threshold value (T), which is intermediate the minimum and maximum values, to output intensity values (Io) in a range between the threshold value (T) and the maximum value (Imax). Intensity values darker than the threshold value are not altered by the image generator with the result that image detail in the lower range of values is not lost. In order to maintain the correct color balance where separate color component intensities are defined in the source image data, each color component is mapped in accordance with a mapping determined for the largest color component value.

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