Method and apparatus for robust shape detection using a hit/miss transform
First Claim
1. An apparatus for detecting regions of interest in input data, comprising:
- a hit correlator which includes a hit thresholder, said hit correlator receiving the input data, performing a hit transform on said input data using a hit kernel to yield hit data, thresholding the hit data and outputting resulting thresholded hit data;
a miss correlator which includes a miss thresholder, said miss correlator receiving the input data, performing a miss transform on said input data using a miss kernel to miss data, thresholding the miss data and outputting resulting thresholded miss data, wherein the hit and miss kernels are adapted to together yield hit and miss data corresponding to a range of shapes and/or sizes; and
a logically ANDing unit that logically ANDs said resulting thresholded hit data and said resulting thresholded miss data and outputs resulting region of interest data.
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Abstract
An apparatus and method for detecting anomalies morphologically detecting regions of interest. The apparatus and method include a region of interest (ROI) detection unit which morphologically detects anomalies in two dimensional input images or morphologically detects regions of interest based on structuring elements which can be set by a user using a modified hit and miss transform which includes a thresholding feature. The thresholding feature makes it possible to vary how much the shape of features within the input images can deviate from the shape of structuring elements and still be detected as a region of interest. One application of this involves detection of abnormal cells in a cervical Pap-smear.
76 Citations
39 Claims
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1. An apparatus for detecting regions of interest in input data, comprising:
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a hit correlator which includes a hit thresholder, said hit correlator receiving the input data, performing a hit transform on said input data using a hit kernel to yield hit data, thresholding the hit data and outputting resulting thresholded hit data; a miss correlator which includes a miss thresholder, said miss correlator receiving the input data, performing a miss transform on said input data using a miss kernel to miss data, thresholding the miss data and outputting resulting thresholded miss data, wherein the hit and miss kernels are adapted to together yield hit and miss data corresponding to a range of shapes and/or sizes; and a logically ANDing unit that logically ANDs said resulting thresholded hit data and said resulting thresholded miss data and outputs resulting region of interest data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for identifying regions of interest, comprising:
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a data acquisition unit for acquiring image data; a data preprocessing unit for receiving said image data and processing said image data to yield processed image data; a region of interest processing unit for receiving and performing a modified hit/miss transform on said processed image data, and for outputting resulting region of interest data, whereby said modified hit/miss transform incorporates a hit transform and a hit kernel that yield hit data, a miss transform and a miss kernel that yield miss data, and thresholding, wherein the hit and miss kernels are adapted to together yield hit and miss data corresponding to a range of shapes and/or sizes. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for detecting regions of interest in input data, comprising:
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receiving the input data; performing a hit transform on said input data using a hit kernel to yield hit data; performing a miss transform on said input data using a miss kernel to yield miss data, wherein the hit and miss kernels are adapted to together yield hit and miss data corresponding to a range of shapes and/or sizes; thresholding the hit and miss data to yield resulting thresholded hit data and resulting thresholded miss data; and logically ANDing said resulting thresholding hit data and said resulting thresholded miss data and outputting resulting region of interest data. - View Dependent Claims (22, 23, 24, 25)
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26. A method for identifying regions of interest, comprising:
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acquiring image data based on radiation scattered from a view; performing a hit correlation using a hit kernel to yield hit transform data; thresholding said hit transform data to yield modified hit transform data of the view; performing a miss correlation using a miss kernel to yield miss transform data; thresholding said miss transform data to yield modified miss transform data of the view; and outputting data approximately common to said modified hit transform data and said modified miss transform data to yield resulting region of interest data, wherein the hit and miss kernels are adapted to together yield hit and miss transform data corresponding to a range of shapes and/or sizes. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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34. A method for identifying regions of interest, comprising:
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acquiring image data based on radiation scattered from a view; performing a hit correlation using a hit kernel to yield hit transform data; thresholding said hit transform data to yield modified hit transform data of the view; performing a miss correlation using a miss kernel to yield miss transform data; thresholding said miss transform data to yield modified miss transform data of the view; and logically ANDing said modified hit transform data and said modified miss transform data to yield resulting region of interest data, wherein the hit and miss kernels are adapted to together yield hit and miss transform data corresponding to a range of shapes and/or sizes. - View Dependent Claims (35)
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36. An apparatus for detecting regions of interest in a Pap-smear slide, comprising:
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an optical hit correlator which includes a hit thresholder, said optical hit correlator receiving optical radiation with input data modulated thereon by passing through the Pap-smear slide, performing a hit transform on said optical radiation using a hit kernel to yield optical radiation modulated with hit data, thresholding the hit-data-modulated optical radiation and outputting optical radiation with resulting thresholded hit data modulated thereon; an optical miss correlator which includes a miss thresholder, said optical miss correlator also receiving said optical radiation with input data modulated thereon, performing a miss transform on said optical radiation using a miss kernel to yield a optical radiation modulated with miss data, thresholding the miss-data-modulated optical radiation and outputting optical radiation with resulting thresholded miss data modulated thereon, wherein the hit and miss kernels are adapted to together yield hit-data-modulated and miss-data-modulated optical radiation corresponding to a range of shapes and/or sizes; and a logical ANDing unit that logically ANDs said optical radiation with resulting thresholded hit data modulated thereon and said optical radiation with resulting thresholded miss data modulated thereon and outputs optical radiation with resulting region of interest data modulated thereon. - View Dependent Claims (37)
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38. A method for detecting regions of interest in a Pap-smear slide, comprising:
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passing optical radiation through the Pap-smear slide to yield modulated optical radiation with input data modulated thereon; receiving and performing a hit transform on said optical radiation using a hit kernel to yield optical radiation modulated with hit data, thresholding the hit-data-modulated optical radiation and outputting optical radiation with thresholded hit data modulated thereon; receiving and performing a miss transform on said optical radiation using a miss kernel to yield optical radiation modulated with miss data, thresholding the miss-data-modulated optical radiation and outputting optical radiation with thresholded miss data modulated thereon, wherein the hit and miss kernels are adapted to together yield hit-data-modulated and miss-data-modulated optical radiation corresponding to a range of shapes and/or sizes; and logically ANDing said thresholded hit-data-modulated optical radiation and said thresholded miss-data-modulated optical radiation and outputting optical radiation with resulting region of interest data modulated thereon. - View Dependent Claims (39)
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Specification