Stray light correction method for imaging light and color measurement system
AssigneeRadiant Imaging, Inc.
InventorsRonald F. Rykowski, Douglas F. Kreysar
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Abstract
A stray light correction method for image light and color measurement system, uses a solid-state light detector array such as a charge-coupled device to record an image, so that a gray level value for each pixel of the solid-state light detector array is obtained. An average gray level value of the solid-state light detector array is calculated based on the gray level value for each pixel. The average gray level value is further multiplied with a stray light factor to obtain a correction value. The gray level value of each pixel is then subtracted with the correction value, such that the stray light effect can be eliminated.
Claims21
A stray light correction method for an imaging light and color measurement system, comprising:
- recording an image using a solid-state light detector array, so as to obtain a gray level value at each pixel of the solid-state light detector array;
- calculating an average gray level value of the image recorded by the solid-state light detector array;
- multiplying the average gray level value of the image recorded by the solid-state light detector array;
- and
- subtracting the correction value from the gray level of each pixel.
A stray light correction method for an imaging light and color measurement system, comprising:
- activating a software, in which a plurality of correction values for various combinations of solid-state light detector arrays/lens/optical elements used for color measurement are stored;
- recording an image using the specific combination of a solid-state light detector array/lens/optical elements used for color measurement entered to the software, to obtain a recorded image with a gray level value at each pixel of the solid-state light detector array;
- wherein the software automatically subtracts each gray level value with a correction value corresponding to the specific combination of a solid-state light detector array/lens/optical elements used for color measurement.
Dependencies are inferred from the claim text.