Hewlett-packard Development Company, L.P.

Guotong Feng

Charles Addison Bouman

Michael George Fuchs

An input image is transformed to produce an output image. Pixels occurring at edges that represent detail within the input image are detected to produce an intermediate image. Background fill representing textures of the input image is generated. The background fill and the intermediate image are combined to produce the output image.

Transforming an input image to produce an output image

An input image is transformed to produce an output image. First pixels occurring at edges within the input image are detected. Second pixels that are part of text within the input image are also detected. The first pixels and the second pixels are combined to produce the output image.

Transformation of an input image to produce an output image

A device to translate an input pixel value to an output pixel value for a current pixel includes a diffusion block to produce a diffusion error to add to the input pixel value to produce a diffused pixel value. In addition, the device includes a feedback modulation block to generate a threshold value, the threshold value determined using a value of an earlier output pixel value, the earlier output pixel value occurring at a predetermined number of pixels prior to the current pixel. Furthermore, the device includes a quantizer to compare the diffused pixel value to the threshold value and based on the comparison to select a value for the output pixel value.

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West Lafayette, IN, United States of America

Guotong Feng