Photography is a rather simple system of recording the intensity of light either directly emitted by a light-source, or transmitted by translucent or transparent gases or bodies, or reflected in various ways by various opaque bodies. The rendering of these intensities by a photographic apparatus results in monochromatic images showing the various levels of light: with various tones of gray ranging from black to white with silver halide salts on film or paper (or with a digital sensor), or with shades of blue in the case of cyanotypes. The problem with these processes is that they do not match human...
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