DWAFFINE</a></b> Derivative of an affine warp</li><li><b><a href='%pathto:imop.vl_imarray;'>VL_IMARRAY</a></b> Flattens image array</li><li><b><a href='%pathto:imop.vl_imarraysc;'>VL_IMARRAYSC</a></b> Scale and flattens image array</li><li><b><a href='%pathto:imop.vl_imdisttf;'>VL_IMDISTTF</a></b> Image distance transform</li><li><b><a href='%pathto:imop.vl_imdown;'>VL_IMDOWN</a></b> Downsample an image by two</li><li><b><a href='%pathto:imop.vl_imgrad;'>VL_IMGRAD</a></b> Image gradient</li><li><b><a href='