PUBLIC MARKS with tags algoritme & photographie

Background Floyd-Steinberg algorithm      X   7/16             3/16   5/16  1/16    The gray value of every pixel (X) is compared to 50% gray and either set to black or white. The entire error (pixel value minus pixel value after applying the threshold) is distributed to the neighbor pixels as shown (7/16+3/16+5/16+1/16=1). As the image is processed from left to right and from top to bottom the threshold is applied to already altered pixels and the error is distributed again and again. Bill Atkinson algorithm X 1/8 1/8 1/8 1/8 1/8 1/8 Only three quarters of the error are equally distributed to six neighbor pixels as shown. Random Dither Every pixels is compared to an individual, randomly determined threshold level. Gray values below the threshold level become black, values above become white.

colour summarizer will produce descriptive colour statistics for an image. Reported will be the average, median or mode, minimum and maximum of each RGB and HSV triplet element.