| 摘要 |
The improved color transformation method comprises determining for each pixel a lightness component specified between a maximum and a minimum value for three signals and chromaticity components obtained by excluding the lightness component from the three signals, amplifying or attenuating the thus obtained chromaticity components in accordance with the three signals and adding them to the lightness component amplified or attenuated in accordance with the three signals. Even if the input original image is a subject, a transmission original hardcopy image, a reflection original softcopy image or an original softcopy image, one can create a reproduced hardcopy image such as a reflective print which is extremely faithful to the input original image or, alternatively, one can provide a monitor display of a reproduced image (a reproduced soft copy image) which is also extremely faithful to the input original image. The processing system is very simple and permits realtime execution. Even transmission original hardcopy images and original softcopy images which are upset in either color balance or density balance or both can be effectively processed to yield reproduced reflection hardcopy image or reproduced softcopy images which feature good balances.
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