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图像质量

峰值信噪比、结构相似性指数 (SSIM);无参考图像质量度量;基于测试图的质量测量

质量度量提供图像质量的客观分数。全参考算法将输入图像与无失真的原始参考图像进行比较。无参考算法将输入图像的统计特征与从图像数据库导出的一组特征进行比较。

经过标准化的测试图包含视觉特征,例如倾斜边缘、灰色补片和彩色补片。这些特征支持测量对应的图像质量特征,例如锐度和颜色准确度。

函数

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immse均方误差
psnr峰值信噪比 (PSNR)
ssim用于测量图像质量的结构相似性 (SSIM) 索引
multissimMultiscale structural similarity (MS-SSIM) index for image quality (自 R2020a 起)
multissim3Multiscale structural similarity (MS-SSIM) index for volume quality (自 R2020a 起)
brisqueBlind/Referenceless Image Spatial Quality Evaluator (BRISQUE) no-reference image quality score
fitbrisqueFit custom model for BRISQUE image quality score
brisqueModelBlind/Referenceless Image Spatial Quality Evaluator (BRISQUE) model
niqe自然图像质量评估方法 (NIQE) 无参考图像质量分数
fitniqeFit custom model for NIQE image quality score
niqeModelNaturalness Image Quality Evaluator (NIQE) model
piqePerception based Image Quality Evaluator (PIQE) no-reference image quality score
esfrChartImatest edge spatial frequency response (eSFR) test chart
colorCheckerCalibrite ColorChecker test chart (自 R2020b 起)
measureSharpnessMeasure spatial frequency response using Imatest eSFR chart
measureChromaticAberrationMeasure chromatic aberration at slanted edges using Imatest eSFR chart
measureColorMeasure color reproduction using test chart
measureNoiseMeasure noise using Imatest eSFR chart
measureIlluminantMeasure scene illuminant using test chart
displayChartDisplay test chart with overlaid regions of interest
displayColorPatchDisplay measured and reference color as color patches
plotSFRPlot spatial frequency response of edge
plotChromaticityPlot color reproduction on chromaticity diagram

主题

质量度量

测试图质量测量