Incremental printing of symbolic information – Thermal marking apparatus or processes – Density control
Patent
1997-02-28
2000-01-25
Le, N.
Incremental printing of symbolic information
Thermal marking apparatus or processes
Density control
347183, 347194, B41J 236
Patent
active
060183551
ABSTRACT:
The improved thermal recording apparatus for forming an image in accordance with image data on a thermal recording material using a thermal head comprises a correction data storage unit for holding shading correction data for the image data and at least one of weighting functions for performing weighting on a coefficient of shading correction of the image data, and an image processing unit that weights the shading correction data on the basis of at least one of the weighting functions, that calculates the coefficient of the shading correction and which then performs at least the shading correction on the image data. The correction data storage unit holds at least one of the respective weighting functions of shading correction coefficient associated with a recording density of the image data, a temperature of the thermal head, a recording speed of the image, temperature and humidity of the thermal recording material and a gradient of the thermal recording material. This apparatus further comprises at least one of the temperature detector of the thermal head, the setting device of the recording speed, the temperature and humidity detectors of the thermal material and the storing device of the thermal material. This apparatus is capable of performing shading correction of image data in high precision.
REFERENCES:
patent: 5838342 (1998-11-01), Takahashi et al.
Fuji Photo Film Co. , Ltd.
Le N.
Vo Anh T. N.
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