Halftone correction systems

A method for producing dot overlap corrected halftone images on a digital printer comprising the steps of:

• calibrating said digital printer with a set of test patterns to provide halftone correction information;
• receiving multi-level digital image signals representing a continuous-tone image;
• storing said multi-level digital image signals;
• and
• halftoning said multi-level digital image signals of the continuous-tone image using a screen corrected according to said halftone correction information to provide an overlap corrected halftone image at said digital printer, wherein said test patterns are independent of the screen corrected.

A system for producing dot overlap corrected color halftone images on a digital color image output device comprising:

• means for calibrating said digital color image output device with a set of color test patterns representing color dots which can differ in color from each other to provide halftone correction information;
• means for receiving multi-level digital color image signals representing a continuous-tone color image;
• means for storing said multi-level digital color image signals;
• and
• means for halftoning said multi-level digital color image signals of the continuous-tone color image responsive to said halftone correction information to provide an overlap corrected color halftone image at said digital color image output device, wherein said color test patterns are provided independent of said halftoning means.

A method for producing dot overlap corrected color halftone images on a digital color image output device comprising the steps of:

• calibrating said digital color image output device with a set of color test patterns representing color dots which can differ in color from each other to provide halftone correction information;
• receiving multi-level digital color image signals representing a continuous-tone color image;
• storing said multi-level digital color image signals;
• and
• halftoning said multi-level digital color image signals of the continuous-tone color image responsive to said halftone correction information to provide an overlap corrected color halftone image at said digital color image output device, wherein said color test patterns are provided independent of said halftoning step.

A system for dot halftone correction of halftone images at a digital printer which operates responsive to two-dimensional binary image signals, comprising:

• means for calibrating said digital printer with a set of test patterns to provide halftone correction information for said digital printer;
• means for receiving uncorrected two-dimensional binary image signals representing an uncorrected halftone image;
• means for storing said uncorrected binary image signals;
• means for generating multi-level digital image signals responsive to said uncorrected binary image signals of said uncorrected halftone image;
• means for storing the multi-level digital image signals;
• and
• means for halftoning said multi-level digital image signals at said digital printer responsive to said halftone correction information to provide a corrected halftone image output.

A method for dot halftone correction of halftone images at a digital printer which operates responsive to two-dimensional binary image signals, comprising the steps of:

• calibrating said digital printer with a set of test patterns to provide halftone correction information for said digital printer;
• receiving uncorrected two-dimensional binary image signals representing in uncorrected halftone image;
• storing said uncorrected binary image signals;
• generating multi-level digital image signals responsive to said uncorrected binary image signals of said uncorrected halftone image;
• storing the multi-level digital image signals;
• and
• halftoning said multi-level digital image signals at said digital printer responsive to said halftone correction information to provide a corrected halftone image output.

A system for dot overlap correction of color halftone images at a digital color printer which operates responsive to two-dimensional binary color image signals, comprising:

• means for calibrating said color printer with a set of color test patterns to provide halftone correction information for said digital printer;
• means for receiving uncorrected two-dimensional binary color image signals representing an uncorrected color halftone image;
• means for storing said uncorrected binary color image signals;
• means for generating multi-level digital color image signals responsive to said uncorrected binary color image signals of said uncorrected color halftone image;
• means for storing the multi-level digital color image signals;
• and
• means for halftoning said multi-level digital color image signals at said digital printer responsive to said halftone correction information to provide an overlap correct color halftone image output.

A method for dot overlap correction of color halftone images at a digital color printer which operates responsive to two-dimensional binary color image signals, comprising the steps of:

• calibrating said color printer with a set of color test patterns to provide halftone correction information for said digital printer;
• receiving uncorrected two-dimensional binary color image signals representing an uncorrected color halftone image;
• storing said uncorrected binary color halftone image signals;
• generating multi-level digital color image signals responsive to said uncorrected binary color image signals of said uncorrected color halftone image;
• storing the multi-level digital color image signals;
• and
• halftoning said multi-level digital color image signals at said digital printer responsive to said halftone correction information to provide an overlap correct color halftone image output.