Human perception of objects: early visual processing of spatial form defined by luminance

Luminance-defined form texture-defined form colour-defined form motion-defined form disparity-defined form integration of the five kinds of spatial information, and some speculation. Appendices: systems science and systems analysis outline of Fourier methods and related topics imaging opponent-process and line element models of spatial discriminations rectification, linearizing, "ON" and "OFF" physiological systems, and Clynes's theory of physiological rein control a note on spatial sampling and Nyquist's theorem the measurement of light linear and logarithmic scales - the decibel elements of vector calculus hypothesis, experiments, serendipity, journals, and grants.