Hewlett-packard Development Company, L.P.

Marti Maria Saguer

Laura Alicia Clemente Gomez

Jordi Arnabat Benedicto

Miguel Angel Lopez Alvarez

Alejandra Terron Arregui

A method of preparing the rendering with a color output device of at least one object, the method comprising &#x2014;computing a first output color profile of a first color model, said profile mimicking, for the human eye, a second output color profile of a second color model, said first output color profile being used in a description of said at least one object in a page description language, and the second output color profile being the output device profile, &#x2014;and converting colors of pixels of the representation of the at least one object obtained by application of a rendering engine to said description, from the first output color profile to the second output color profile.

Method of preparing the rendering with a color output device of at least one object

In one example, a color image is converted to a gray image and/or a black and white image. The amount of chroma in an input image is detected and conversion to gray and/or black and white of the input image is computed simultaneously.

Color image conversion using chroma

A method to enable modification of color characteristics of an image. In the method, an image, defined in a first color space, is transformed to a second color space; and display of the transformed image is controlled. A color characteristic of the transformed image is modified using a rule defined in the second color space in response to a user input, and display of the modified transformed image is controlled.

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Palamos, Spain

Marti Maria Saguer