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The Role of Parametric Factors on Visual Assessment of Camouflage Substrates

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In order to obtain a rapid, accurate, repeatable and reproducible quality control protocol for the visual assessment of Universal Camouflage Pattern (UCP) substrates, various methodologies were examined. The role of parametric factors in repeatability and reproducibility of visual assessments was determined. Each of the colors within the pattern was measured spectrophotometrically and samples were then assessed by a panel of na├»ve subjects under various conditions. An acceptability tolerance volume for each color was obtained under simulated daylight illumination at 7500K (equivalent to illuminant D75) using eighteen subjects that repeated assessments six times on separate dates. Visual assessment techniques included a set of sixty woven camouflage samples, some of which contained a repeat pattern that we refer to as “key” and some that did not. Identical subjects repeated assessments under various viewing and surround conditions (e.g. placing samples side by side or juxtaposing samples). A total of 31,320 visual assessments were thus obtained. The role of viewing conditions on the level of inter- and intra-subject variability in pass/fail assessments, as well as color difference evaluation of individual colors, based on an AATCC Gray Scale evaluation method, was examined. STRESS was used to compare the degree of variability among subjects. Analysis of results indicates that subjects' agreement in determining pass/fail responses is improved when a visual reference (such as the print repeat pattern) is included as reference. In addition masking the surround improved subject consistency and repeatability in assessments.
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Document Type: Research Article

Publication date: January 1, 2013

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  • CIC is the premier annual technical gathering for scientists, technologists, and engineers working in the areas of color science and systems, and their application to color imaging. Participants represent disciplines ranging from psychophysics, optical physics, image processing, color science to graphic arts, systems engineering, and hardware and software development. While a broad mix of professional interests is the hallmark of these conferences, the focus is color. CICs traditionally offer two days of short courses followed by three days of technical sessions that include three keynotes, an evening lecture, a vibrant interactive (poster) papers session, and workshops. An endearing symbol of the meeting is the Cactus Award, given each year to the author(s) of the best interactive paper; there are also Best Paper and Best Student Paper awards.

    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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