Picture quality stabilizer for a color laser printer

Details Picture quality stabilizer for a color laser printer Picture quality stabilizer for a color laser printer

1998-01-07

2000-02-29

Powell, Mark R.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 11, 358 114, 358503, 399 94, 399 97, G03G 1301

Patent

active

060316292

ABSTRACT:
In the picture quality stabilizer for a color laser printer, changes in the gray level characteristic and the color balance caused by changes in temperature and humidity are compensated in order to stabilize the reproduced image. The apparatus includes a temperature and humidity sensor, an upper-bound correction table, a gamma correction table and a mixed color correction table, each optimized with respect to a reference environment, interpolation means for those tables, and a gray level correction means for correcting the gray level with correction coefficients obtained by the interpolation means and the mixed color correction means for compensating any failure of the color balance with the linear transformation. With this configuration, the correction coefficients are so modified as to establish a stable gray level characteristic and color balance, and a stable reproduced image can be obtained.

REFERENCES:
patent: 5109275 (1992-04-01), Naka et al.

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