A method and system for processing image data in a laser printer

By constructing an affine transformation matrix and combining it with a bicubic interpolation algorithm, the multi-channel geometric deviation of a color laser printer is accurately compensated, solving the problem of insufficient registration accuracy and improving the image output quality.

CN122115281APending Publication Date: 2026-05-29SHANGHAI NAFU COMM EQUIP TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI NAFU COMM EQUIP TECH CO LTD
Filing Date
2026-01-20
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing color laser printers, under long-term operation or environmental changes, cannot accurately correct complex geometric deviations such as tilting and scaling that occur independently in each color channel, resulting in problems such as blurred color edges, ghosting, and muddy color mixing in the image.

Method used

By acquiring the registration deviation data of each color channel, an affine transformation matrix is ​​constructed, inverse matrix multiplication is performed on the target image space, and resampling is performed in combination with a bicubic interpolation algorithm to generate a corrected color separation bitmap, and then the laser is driven to generate an electrostatic latent image.

Benefits of technology

It achieves precise compensation for complex multi-channel geometric deviations without physical intervention, eliminating image ghosting and edge blurring, and significantly improving print quality.

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Abstract

The application provides a laser printer image data processing method and system, and belongs to the technical field of digital image processing. The application firstly acquires original color separation bitmap data of a target printing page and alignment deviation data including displacement, inclination and scaling information. Then, an independent affine transformation matrix is constructed for each color channel according to the deviation data, and the matrix is used for reverse operation on a target pixel point to determine a sampling coordinate. Subsequently, the original pixel gray value in the neighborhood of the sampling coordinate is resampled through a bicubic interpolation technology to construct a corrected color separation bitmap. Finally, the corrected bitmap is converted into a laser signal to drive a laser imager. The application can pre-compensate for the physical mechanical deviation of a printing engine through full digital geometric correction, effectively solves the alignment error problem in color printing, and improves the definition and coincidence of a printed image.
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