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InformationX-bit Labs for mobile users! Do not forget that we are running a special version of X-bit Labs web-site for users of mobile and handheld devices: http://pda.xbitlabs.com. Check out our news and articles from smartphones and PDAs to be always updated on the latest computer and technology news. <%BANNER[right_130x600]%>
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Articles: Other
EPSON Perfection 3170/4180 PHOTO Scanners Review (page 6)Category: Other [ 10/21/2004 | 02:22 PM ] Profiling and Gamut RangesThis section is concerned with evaluating the error in the scanners’ interpretation of the colors of the original IT8.7/2 color target with the help of a color management system. In other words, we will know the coefficient of the color distortion introduced by the scanner into the image. Below there are gamut range diagrams for opaque (reflective) and transparent (emissive) originals.
The gamut range is outlined with a triangle in the diagrams. It is a projection on the plane and shows the scanner’s palette in the visible light spectrum. Since we know the coordinates of the vertexes of the triangles, we can calculate their areas to estimate the absolute values of the ranges.
For the comparison’s sake, I also offer the squares of the triangles for the standard sRGB and Wide Gamut RGB color spaces (the former is used with the majority of monitors, and the latter is the maximum area in the CIE La*b* space). The next diagram is constructed by calculating the difference between the colors of the original color target and its scan. Note that Color Difference values above 5.0 are discernable by most people, i.e. evident for the “average” human eye.
The diagram shows that the errors in color reproduction fall on the darkest sections of the color target, starting from the point GS17. <%BANNER[banner_468x30]%>
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Category NewsCategory: Other Friday, July 25, 20089:00 am AMD Denies Manufacturing Operations Spin Off Plan. AMD: Only Real Men Have Fabs Thursday, July 24, 200811:59 pm HP Set to Make Voodoo-Branded Systems Available Worldwide. HP’s Voodoo Computers to Be Available Through HP Sales Network Tuesday, July 22, 200811:55 pm Tens of Companies Support Sony’s TransferJet Close Proximity Wireless Transfer Tech. Consortium Formed to Develop TransferJet Technology 10:24 pm AMD Chief Executive: Major Restructuring Will Spin Off Manufacturing in Months. AMD Prepares to Spin Off Manufacturing Operations Friday, July 18, 20086:49 am Intel Denies Accusations of Illegal Business Practices. Intel: CPU Market Is Highly Competitive, AMD’s EC’s Allegations are Unfounded All Latest News <%BANNER[right_130x130_1]%>
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