Feature intensity reconstruction of biological probe array
First Claim
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1. A computer-implemented method of determining feature intensities from image data from a probe array, the method comprising:
- a. obtaining image data for a plurality of features of the probe array, wherein the image data comprises a set of pixels, wherein the set of pixels comprises groups of pixels associated with each feature, wherein the groups are aligned with each feature, wherein the groups of pixels indicate a center pixel for each feature;
b. determining observed pixel intensities for one or more pixels in the set of pixels;
c. determining initial feature intensities for the plurality of features, wherein the initial feature intensities are based upon the observed pixel intensities;
d. determining a theoretical pixel intensity for one or more pixels in the set of pixels from feature intensities of one or more of the plurality of features;
e. determining an error for each pixel in the set of pixels, wherein the error is based upon the observed pixel intensity and the theoretical pixel intensity; and
f. determining a corrected feature intensity for the plurality of features, wherein the corrected feature intensity is based upon a previously determined feature intensity and the error, andg. repeating steps d-f comparing the corrected feature intensities against previously determined feature intensities until the corrected feature intensities converge; and
h. after convergence, outputting the adjusted feature intensities.
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Abstract
The invention provides methods and systems for reconstructing feature intensities from pixel level data. In certain embodiments, the invention uses an empirically determined transfer function to construct a theoretical estimate of pixel level data and then iteratively updates feature intensities based on a minimum multiplicative error between the pixel level data and the theoretical estimate of the pixel level data.
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Citations
20 Claims
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1. A computer-implemented method of determining feature intensities from image data from a probe array, the method comprising:
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a. obtaining image data for a plurality of features of the probe array, wherein the image data comprises a set of pixels, wherein the set of pixels comprises groups of pixels associated with each feature, wherein the groups are aligned with each feature, wherein the groups of pixels indicate a center pixel for each feature; b. determining observed pixel intensities for one or more pixels in the set of pixels; c. determining initial feature intensities for the plurality of features, wherein the initial feature intensities are based upon the observed pixel intensities; d. determining a theoretical pixel intensity for one or more pixels in the set of pixels from feature intensities of one or more of the plurality of features; e. determining an error for each pixel in the set of pixels, wherein the error is based upon the observed pixel intensity and the theoretical pixel intensity; and f. determining a corrected feature intensity for the plurality of features, wherein the corrected feature intensity is based upon a previously determined feature intensity and the error, and g. repeating steps d-f comparing the corrected feature intensities against previously determined feature intensities until the corrected feature intensities converge; and h. after convergence, outputting the adjusted feature intensities. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification