Color Rendering Analysis in Nikon D90 Digital Still Camera
Reem El Asaleh, Michael Wu

Abstract
The convenient use of digital cameras along with the affordable prices and high image quality allows using the min many fields. The quality of the digital image reproduction would differ based on the camera hardware performance and the applied image color processing. This paper will focus on evaluating the variances of color rendering process of raw image data between in-camera Nikon D90 processing and Adobe Camera Raw (ACR) deferred processing of a ColorChecker® target image through colorimetric analysis. Results from ColorChecker analyses were used as reference data in attempt to reverse-engineer D90 color reproduction with adjustment tools available to ACR processing. ACR processing experiments referred to color measurements and Exchangeable Image File format (Exif) metadata to ultimately reduce average color differences between ACR and D90 processing from 8ΔE*ab to nearly2.5ΔE*ab developing more consistent reproduction between the workflows. This analysis provides digital photo reproduction insights for premedia technicians, photographers, and color scientists.

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