Topic: Idl Interactive Ciecam97s Tool Name : Sun Hee Park and Sun Ju Park @bullet Value Conversion (from Rgb to Xyz and from Xyz to Rgb)

PROBLEM STATEMENT: CIECAM97s was chosen as a CIE recommended color appearance model based on its high-performance on object color appearance predictions under various viewing conditions. The model had been developed on the basis of well-defined features from other models. An IDL interactive CIECAM97s tool has been developed in order to demonstrate the influence of CIECAM97s parameters on images. Prior to the implementation, predictions for color changes under various conditions have resulted in producing numbers that indicate attributes of the object color. Using the numbers, corresponding colors located in a defined color space have been found in order to evaluate the actual color changes. When predicting color appearance using numbers, additional calculations to represent color changes in a color space using various attributes of object color such as hue, lightness, brightness, saturation, chroma, and colorfulness are necessary. On the other hand, the IDL interactive CIECAM97s tool will produce the immediate color changes made under different viewing conditions. It allows the user to compare the newly predicted image with the original image. The CIECAM97s tool has been developed on the basis of chromatic adaptation transform calculations. A user sets five input parameters to desired values. Then, color predictions are made based on CIECAM97s formulae. Based on outcomes of CIECAM97s, the new image is presented to the user.