47. Quality of lines and edges - toner scatter - 2011

47. Quality of lines and edges - toner scatter - 2011 -...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
HP-PURDUE CONFIDENTIAL Slide No. Fundamentals 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
HP-PURDUE CONFIDENTIAL Slide No. Motivation Issue Text and lines are indispensable to print quality Toner overdevelopment causes toner scatter Toner scatter makes printed pages appear blurred near the edges of text or thin lines Current solutions Limit the color gamut of printers » Undesired color shifts and introduction of halftone texture Compensate for toner overdevelopment by the coring algorithm » Little research due to new exclusive method 2
Background image of page 2
HP-PURDUE CONFIDENTIAL Slide No. Toner Scatter 3 EP process Effect of toner scatter
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
HP-PURDUE CONFIDENTIAL Slide No. Overview of Coring Technique of decreasing amount of colorant in the interior of text or characters to diminish effect of toner scatter Optimal coring value: minimum decrease of colorant amount by percentage of nominal colorant level 4 Profile of cored line No coring 18% coring 50% coring Annulus with10-pixel width Printed at 600 dpi, scanned at 1200 dpi
Background image of page 4
HP-PURDUE CONFIDENTIAL Slide No. Overview of Coring (cont.) By utilizing both high and low resolution image data 5 Coring algorithm
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
HP-PURDUE CONFIDENTIAL Slide No. Goals Reduce toner scatter in region of interest, while yielding the appearance of sharper edge transition Overcome disadvantages caused by limiting the color gamut of printers 6 No coring Optimally cored color clipped Printed at 600 dpi, scanned at 1200 dpi
Background image of page 6
HP-PURDUE CONFIDENTIAL Slide No. Outline Remote Print Defect Diagnosis Print Quality Assessment Fundamentals Determination on Optimal Coring Values Preference Experiment Conclusions Future Work 7
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Slide No. Determination on
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/19/2012 for the course ECE 638 taught by Professor Staff during the Fall '08 term at Purdue University-West Lafayette.

Page1 / 23

47. Quality of lines and edges - toner scatter - 2011 -...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online