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Computational Accuracy of RGB Encoding Standards

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In this paper, we reported the computational accuracy of various RGB encoding standards using a set of color patches printed by an inkjet printer. These patches were measured in CIELAB under D65 illuminant. The color spaces under study were Adobe RGB98, Bruce RGB, an extended RGB, CIE 1931 RGB, CIE 1964 RGB, a proposed inkjet RGB, Kodak RIMM/ROMM RGB, a proposed Laser RGB, NTSC RGB, Photoshop wide gamut RGB, sRGB, sRGB64, and SMPTE RGB. The computational path was from L*, a*, and b* via CIEXYZ to RGB. The conversion from CIEXYZ to a specified RGB space followed the definition of that space. The resulting RGB values were scaled to integers in various bit-depth. For comparison purpose, the scaled integer RGB values were converted back to CIELAB. The color difference between measured and reversed CIELAB values was used as the measure for computational accuracy.

From this exercise, we were able to pinpoint major causes of the computational error. The remedies to the problem were recommended and preferred RGB color spaces were suggested.

Document Type: Research Article

Publication date: 2000-01-01

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  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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