Apparatus and method for arbitrary binary resolution conversion

Details Apparatus and method for arbitrary binary resolution conversion Apparatus and method for arbitrary binary resolution conversion

G - Physics

06

F

G06F 3/12 (2006.01) G06T 3/40 (2006.01) G06T 5/10 (2006.01) H04N 1/40 (2006.01)

Patent

CA 2132248

A method of arbitrary image resolution conversion takes an original print ready image at a first resolution and orientation and simulates printing of that image by creating a representation of a page at a particular resolution and orientation using a suitable spot model for the reconstruction function. The image is then filtered with a low pass filter and sampled with an aperture that corresponds to the desired output. The image data, which may be definable at several bits per pixel, is then made print-ready by reducing the number of bits defining each pixel to a valid output state. The reduction step is accomplished through error diffusion methods that maintain the local area gray density level. The filtering step reduces moire in the converted image.

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