In digital image reproduction, it is often desirable to compute image difference of reproductions and the original images. The traditional CIE color difference formula, designed for simple color patches in controlled viewing conditions, is not adequate for computing image difference for spatially complex image stimuli. Zhang and Wandell [Proceedings of the SID Symposium, 1996; p 731–734] introd...

We propose a complete methodology for the control of the color responses of the input/output devices for color facsimile. An initial calibration of both scanner and printer is done offline. The color response of each device is then modelized by 3D non-linear transformations linking their specific RGB/YMC color space with the standard CIELAB color space. These transformations are then quickly ca...

A measure is developed for comparing complex scenes produced by single-chip digital color cameras. The proposed measure is based on the CIELAB color space with appropriate considerations to the sensitivity of the Human Visual System (HVS) when viewing a complex scene. For comparison purposes, the error measures proposed have been implemented using the , and the recently recommended color differ...

STATEMENT OF PROBLEM For restorations with excellent esthetics, an understanding of the optical properties of human dentin is needed. Little information is available on the translucency and color parameters of dentin and its relationship to tooth type and position. PURPOSE The purpose of this in vitro study was to investigate the translucency and CIELab color coordinates of human dentin in bo...

A desktop scanner was colorimetrically characterized to average CIELAB error of less than unity for Kodak Ektachrome transparencies and Ektacolor paper, and Fuji Photo Film Fujichrome transparencies and Fujicolor paper. Independent verification on spectrally similar materials yielded average ∆E*ab error of less than 2.1. The technique first modeled the image formation of each medium using eithe...

This study introduces new models and mathematical formulations describing the light scattering and ink spreading phenomena. Based on these new theoretical tools, the spectra of 100 real paper samples produced by two ink-jet printers were computed with an average prediction error of about in CIELAB.