摘要:
A photograph image-processing method, comprising steps of entering a film image (10a) by reading a film image (10a) by an image pickup device (116) and generating color image data, generating concentration histograms for each of RGB color components from the color image data, relative-stretch-processing the concentration histograms, calculating and deriving a relative stretch ratio which maximizes the RGB superimposed area which has undergone relative-stretch processing, calculating and deriving an evaluation value of reliability with respect to the relative stretch ratio, calculating and deriving a correction stretch ratio based on the evaluation value, and conversion-processing RGB components of each pixel of the color image data in accordance with the correction stretch ratio.
摘要:
A method of detecting the base concentration of a film is provided comprising the steps of generating a concentration histogram from the film image in each of the RGB color components read out with an image pick up device, shifting and stretching the histograms in the other colors towards the histogram in the reference color in the concentration axial direction, calculating an superimposed area between the two histograms in the two color components after the stretching process, and finding the shift rate and the stretch ratio when a total of the respective superimposed areas calculated is the greatest value. As the minimum of the lowest concentration in the histograms at the shift rate and the stretch ratio determined is specified to represent the location of the base concentration in the original histogram, the base concentration in each color component of the film can be calculated from the location of the base concentration in the histogram.
摘要:
From color image data read by an image pickup device (116), concentration histograms are generated for each of RGB color components, and with the specific color concentration histogram used as reference, other color concentration histograms are shifted in the concentration axial direction, respectively; then, other color concentration histograms are stretched in the concentration axial direction with the minimum concentration value used as reference, superimposed areas of concentration histograms by combinations of two color components after stretch-processing are calculated and derived, respectively, and based on the shift rate and stretch ratio which maximize the total of superimposed areas obtained respectively, each color component of each pixel of the color image data is converted.
摘要:
A method of detecting the base concentration of a film is provided comprising the steps of generating a concentration histogram from the film image in each of the RGB color components read out with an image pick up device, shifting and stretching the histograms in the other colors towards the histogram in the reference color in the concentration axial direction, calculating an superimposed area between the two histograms in the two color components after the stretching process, and finding the shift rate and the stretch ratio when a total of the respective superimposed areas calculated is the greatest value. As the minimum of the lowest concentration in the histograms at the shift rate and the stretch ratio determined is specified to represent the location of the base concentration in the original histogram, the base concentration in each color component of the film can be calculated from the location of the base concentration in the histogram.
摘要:
From color image data read by an image pickup device, concentration histograms are generated for each of RGB color components, and with the specific color concentration histogram used as reference, other color concentration histograms are shifted in the concentration axial direction, respectively; then, other color concentration histograms are stretched in the concentration axial direction with the minimum concentration value used as reference, superimposed areas of concentration histograms by combinations of two color components after stretch-processing are calculated and derived, respectively, and based on the shift rate and stretch ratio which maximize the total of superimposed areas obtained respectively, each color component of each pixel of the color image data is converted.