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DotCode represents data in rectangular structure which consists from black round dots and white spaces on white background or white round dots on black background. DotCode does not have finder pattern, like other 2D barcodes and it must be detected with slow blob detection algorithms like Gabor filter or Circle Hough Transform.
Red polka dots on a yellow background. The polka dot is a pattern consisting of an array of large filled circles of the same size. [1]Polka dots are commonly seen on children's clothing, toys, furniture, ceramics, and Central European folk art, but they appear in a wide array of contexts.
Chroma dots were once regarded as undesirable picture noise, but recent advances in computer technology have allowed them to be used to reconstruct the original colour signal from black-and-white recordings, providing a means to re-colour material where the original colour copy is lost. Example of the chroma dot reconstruction:
Left: Halftone dots. Right: Example of how the human eye would see the dots from a sufficient distance. Halftone is the reprographic technique that simulates continuous-tone imagery through the use of dots, varying either in size or in spacing, thus generating a gradient-like effect. [1] "Halftone" can also be used to refer specifically to the ...
Detail from Seurat's Parade de cirque, 1889, showing the contrasting dots of paint which define Pointillism. Pointillism (/ ˈ p w æ̃ t ɪ l ɪ z əm /, also US: / ˈ p w ɑː n-ˌ ˈ p ɔɪ n-/) [1] is a technique of painting in which small, distinct dots of color are applied in patterns to form an image.
Prints made by the second technique are sometimes called prints in the dotted manner, or dotted prints, Schrotblatt in German and Manière criblée in French. [3] It was also possible to combine the techniques on the same plate, with figures using black lines, and backgrounds with punched white dots on a black background.
Ben Day dots The Ben Day process is a printing and photoengraving technique for producing areas of gray or (with four-color printing ) various colors by using fine patterns of ink on the paper. It was developed in 1879 [ 1 ] by illustrator and printer Benjamin Henry Day Jr. (son of 19th-century publisher Benjamin Henry Day ). [ 2 ]
The 'figure' must be black on a white symbol field, and never the reverse, white symbols on a black field. [ 2 ] Symbols were determined to be typically legible from approximately 30 feet (9.1 m) with a 3 inches (76 mm) symbol to 155 feet (47 m) with a 12 inches (300 mm) symbol.