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US 7,024,037 B2Granted
Cross-polarized imaging method for measuring skin ashing
AssigneeUnilever Home & Personal Care USA, Division of Conopco, Inc.
InventorsXiaodong Zhang, Liang Sheng Tsaur, Helene Santanastasio, Pravin Shah, Srinivasan Krishnan
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Abstract
A process for measuring skin ashing is provided. The process comprises selecting a desired skin testing area and acguiring an image of the area using x-polarization technique. The image is analyzed by obtaining a light distributing image, storing the difference between this image and the original image and using a differential in intensity to define ashing.
Claims10
A process for measuring skin ashing comprising:
- (a) selecting a desired area of skin to be tested for skin ashing;
- (b) acquiring an image of the desired area with an image capturing device using a x-polarization technique to acquire said image;
- and
- (c) analyzing said acquired image to determine ashing;
- wherein the image of step (c) is analyzed by:
- (i) acguiring an original image as described in Step (b);
- (ii) obtaining a light distributing image from the original image;
- (iii) storing the difference between the light distribution image and original image as a new image and;
- (iv) defining a fixed threshold of intensity unit over a baseline intensity to said image and marking areas meeting said threshold in white to define ashing.
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