Hewlett-Packard Development Company, L.p.

Philip Stallbaumer

Kieran B Kelly

Feng Yuan

The present invention relates to methods of coalescing device independent bitmaps (&ldquo;DIBs&rdquo;) into images for rendering onto a printed page such that artifacts induced by global techniques for image enhancement are avoided. The present invention distinguishes three classes of DIBs for separate treatment. One group of DIBs constitute a single and sole image on the page for which full coalescence and subsequent image enhancement is appropriate. Another class of DIBs may constitute separate images on a multiple-image page for which intra- (but not inter-) image coalescence is appropriate followed by separate image-by-image global enhancements. The third class of DIBs are recognized by the present invention as unsuitable for global enhancements and, rather than risk introduction of image artifacts, no global enhancements are applied.

Coalescence of device independent bitmaps for artifact avoidance

An inkjet printer having functionality to adaptively control an amount of force applied to a servicing sled used to clean an inkjet printhead. In selecting a run force to be applied to the servicing sled, a test force is applied to the servicing sled to determine if the servicing sled will move a predetermined distance under the test force.

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Camas, WA, United States of America

Philip Stallbaumer