Table 1: Red, green, and blue percentages of metric result for subset images: large red percentage means more contrast reversal, large green percentage denotes more contrast loss, and large blue percentage indicates more detail revelation.

ImagesPercentage (%)
ProposediPGLDR2HDR expansion
RedGreenBlueRedGreenBlueRedGreenBlueRedGreenBlue

Sky1.0200.07288.466.2602.14024.567.20028.7117.383.1600.38054.18
Sun0.3700.76081.173.04017.5031.921.62015.0743.5873.1526.120.660
Snow1.5400.59068.093.4909.65041.446.60055.5617.1501000
Sea1.2503.35049.562.0203.16053.632.24065.059.8201.7003.04030.84
Building1.5600.19061.063.2605.25032.598.52025.9028.736.23061.7022.28
Gate2.6800.35076.199.10010.3765.6913.7516.9840.847.82076.2210.86
River2.3200.76055.754.9902.2002.47010.0139.931.58024.0375.920

Average1.5340.86868.614.5947.18136.047.13435.3122.7316.5949.0516.97