Method for generating a calibration curve
AssigneeTranspacific IP, Ltd.
InventorChui-Kuei Chiu
Life of this patent
Estimating the term…
Abstract
A method for generating a calibration curve is disclosed. The method comprises the following steps. Calibration data of one line image of a previous scan are first provided. Reference pixels are selected from the image line. Then a calibration board is scanned and calibration data of the reference pixels are generated. Calibration data of the reference pixels of a previous scan are then selected from the calibration data of one image line of a previous scan. Ratios of the calibration data of the reference pixels and the calibration data of the reference pixels of a previous scan are calculated. Calibration data of all pixels of the image line are finally generated by multiplying the calibration data of the image fine of a previous scan and the ratios.
Claims23
A method comprising:
- selecting one or more reference pixels corresponding to an image line from a previous scan, the one or more reference pixels associated with previous calibration data;
- scanning a calibration board to generate calibration data for the one or more reference pixels, wherein the one or more reference pixels number fewer than all pixels of the image line associated with the previous calibration data;
- and
- calculating a ratio comprising the generated calibration data and said the previous calibration data corresponding to the one or more reference pixels to generate a calibration curve.
A system comprising:
- memory operable to store first calibration data corresponding to one or more reference pixels in an image line from a previous scan, wherein the one or more reference pixels number fewer than all pixels of the image line from the previous scan;
- one or more image sensors operable to scan a calibration board;
- and
- a calibration unit operable to:
- generate second calibration data for the one or more reference pixels, and
- calculate one or more ratios of comprising the first calibration data and the second calibration data to calibrate the one or more image sensors.
A calibration unit configured to calibrate one or more sensors of a scanner, the calibration unit operable to:
- select one or more reference pixels from stored calibration data, corresponding to an image line from a previous scan, wherein the one or more reference pixels number fewer than all pixels of the image line from the previous scan;
- generate calibration data for the one or more reference pixels;
- calculate a ratio of the generated calibration data and the stored calibration data;
- and
- generate a calibration curve.
A system comprising:
- means for storing calibration data corresponding to an image line from a previous scan;
- means for selecting one or more reference pixels from the image line;
- means scanning a calibration board;
- means for generating calibration data for the one or more reference pixels, wherein the one or more reference pixels number fewer than all pixels of the image line associated with the calibration board;
- means for calculating a ratio comprising the generated calibration data and the stored calibration data;
- and
- means for generating a calibration curve using the one or more ratios.
Dependencies are inferred from the claim text.