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Saturday 12 January 2019


Definition : The visual appearance of objects is given by the way in which they reflect and transmit light. The color of objects is determined by the parts of the spectrum of (incident white) light that are reflected or transmitted without being absorbed.

Additional appearance attributes are based on the directional distribution of reflected (BRDF) or transmitted light (BTDF) described by attributes like glossy, shiny versus dull, matte, clear, turbid, distinct, etc.

The visual appearance is studied by morphology.

The visual appearance of abnormal phenomenons in diseases forms macroscopical anomalies and microscopical anomalies.

Their study forms morphological pathology, associating macroscopy , histopathology and cytopathology.


- cellular appearance

- tissular appearance

- tumoral appearance