Lexmark International, Inc.

Gretchen Yvonne Gibson

Mohamed Nooman Ahmed

Curt Paul Breswick

Bob Thai Pham

Michael Anthony Marra, Iii

Marc Alan Herwald

Joseph Kamal Yackzan

Pixel characteristics, such as whether a pixel forms part of the background of an image, are evaluated by computing histograms from pixel color space components, by comparing pixel color space components to threshold values, or by other methods.

Intelligent hardware for detecting color value of an image

A scanning operation is synchronized with the motion of a scan mechanism. Encoder signals indicative of a position of the scan mechanism relative to a scan platen or an object being scanned are received. These encoder signals may include a single channel phase signals are channel A and channel B phase signals. Transitions of the encoder signals are detected. Scan pulses for triggering a scan operation by a scan element are generated based on transitions of the encoder signals. Differences in the encoder signal resolution and a desired scan resolution are compensated for in the generation of the scan pulses. A transfer signal is generated in synchronization with the scan pulses for controlling output of data from the scan element. Variations of the velocity of the scan mechanism cause variations of the frequency at which the scan pulses are generated. Variations in the velocity of the scan mechanism are accounted for during this synchronization by varying the duration of the transfer state of the transfer signal in relation to the variations of the scan pulse frequency. The duration of the exposure state of transfer signal is kept constant, ensuring a constant exposure time for the scanning device.

Method and apparatus for synchronizing a scan operation with the motion of the scan mechanism

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Lexington, KY, United States of America

Gretchen Yvonne Gibson