Figure 4
From: Efficient robust image interpolation and surface properties using polynomial texture mapping
Quality of entire image set reconstructed with non-robust, LS-based PTM and HSH over range of dimensionalities. (a) PSNRs for PTM (black curve) and HSH (red, dashed curve), for luminance images, over values of the basis set dimension; the horizontal blue dashed line indicates PSNR = 30. Here the PSNR value displayed is for the entire set of input images compared to the approximated set. (b) PSNRs for PTM (scattered circles) and HSH (surface) in RGB images versus the dimensions for luminance and chromaticity. (c,d) PSNRs for approximated images for each of the lighting direction images, for PTM and HSH, respectively. PSNR is plotted as against the x and y components of the lighting direction. Blue circles indicate PSNRs for individual reconstructed image in the dataset, and the coloured surface shows an interpolation surface. Here, 16D for luminance and 9D for chromaticity are used.