METHOD OF DETECTING AND PRINTING COLOR PHOTOGRAPHIC IMAGES EXPOSED WITH NARROW BAND ILLUMINANT

摘要

in automatic color printing, it is necessary to identify the scenes that have been exposed to an agent illuminating elements very close and not perform any color correction to such scenes.the scenes of the agent one narrow veins are identified by scanning the original image in three primary coleurs to produce three color value distributions.the results of the three color value distributions are recorded on the computer, and if the ratio of standard deviations of one or the other of the two distributions of colour value is greater than a first predetermined constant (e.g., less than 4) a second predetermined constant (e.g. 0.25), no color correction is made.the process is particularly useful in a photographic printer using a color histogram changes by scanning for correcting the timing of shades of color and make adjustments in the balance of colors.