Lightness    HDR Publications Collection of High-Dynamic-Range experiments Top-Down vs. Bottom-Up Vision Appearance or Perceptual Recognition Assimilation Is Assimilation the same mechanism as Contrast? Analysis of both Local Maxima and. Multi-resolution Processing Illumination Do visual mechanisms process illumination the same as reflectance? Gradients, Sinewaves & Edges Experiments on the visibility threshold and matching appearances of gradients and very low-spatial frequency sinusoids. They are very different from edges. Retinex Models 1964 - Today Review publications of Retinex Theory and Land & McCann spatial models that calculate appearance. http://www.mccannimaging.com/Lightness/HDR_Papers.htmlhttp://www.mccannimaging.com/Lightness/TopDown_vs._Bottom_Up.htmlhttp://www.mccannimaging.com/Lightness/Assimillation.htmlhttp://www.mccannimaging.com/Lightness/Illumination.htmlhttp://www.mccannimaging.com/Lightness/Gradients_and_Edges.htmlhttp://www.mccannimaging.com/Lightness/Retinex_Models.htmlshapeimage_1_link_0shapeimage_1_link_1shapeimage_1_link_2shapeimage_1_link_3shapeimage_1_link_4shapeimage_1_link_5