| 标题 |
General Image Quality Equation; GIQE version 5
一般图像质量方程；GIQE版本5
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| 网址 | |
| DOI |
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| 其它 | Previous GIQEs, versions 3 and 4, were developed by NGA to predict the NIIRS (National Imagery Interpretation Rating Scale) of Electro optical (EO) and panchromatic and IR images that had been processed to film. It is reasonable to assume that such imagery had a fixed enhancement chain so these previous versions of the GIQE used image quality metrics of the enhanced image. This paper updates the GIQEs to predict the NIIRS of digital images in a softcopy display environment where image enhancements – principally sharpening and contrast adjustments - are interactive tools on the Electronic Light Table (ELT). Because the exact enhancements applied are not known in advance, this new version of the GIQE predicts NIIRS using image quality parameters (Ground Sample Distance (GSD), Relative Edge response (RER), Smear and Signal-to-Noise-Ratio (SNR)) of the un-enhanced image. |
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