Device-independent graininess reproduction

We evaluated a method for building a psychophysically based model of graininess perception for a device-independent graininess-reproduction system. The model was developed through experiments that explored the relationship between physical parameters of graininess objects, subjective rating, and the maximum luminance of the displays used to present the objects. The graininess model was generated via multiple regression analysis of the parameters and was used to calculate curved surfaces for which graininess perception was equalized. Even if the values of maximum luminance on the display are changed in the model, the value of graininess under the changed luminance is held by changing the physical parameters of graininess generation in the model. We found that the proposed model and process for device-independent graininess reproduction were effective for our adopted displays with various maximum luminances.