Specifies a reduction to apply to an image. For example a 800x400 image reduced by a 4x1 ratio will have a resolution of 200x100.
siImageRatio.siImageRatio1x1 // 0 siImageRatio.siImageRatio2x1 // 1 siImageRatio.siImageRatio4x1 // 2 siImageRatio.siImageRatio8x1 // 3 siImageRatio.siImageRatio16x1 // 4 siImageRatio.siImageRatioThumbnail // 5 |