Elastic image registration
First Claim
Patent Images
1. A method of registering a floating image and a reference image, the method comprising the steps of:
- selecting, by an image processing device, at least one first landmark in the floating image;
selecting, by the image processing device, at least one second landmark in the reference image, wherein the at least one first landmark corresponds to the at least one second landmark; and
registering, by the image processing device, the floating and reference images by using a similarity value which relates to a similarity of a first region in the floating image determined by the at least one first landmark and a second region in the reference image determined by the at least one second landmark, the registering including selecting at least one further first landmark in the floating image and at least one further second landmark in the reference image if the similarity value is less than a pre-selected value.
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Abstract
Image registration very often used to be a tedious task which had to be performed manually. According to an exemplary embodiment of the present invention, a non-rigid image registration by an iterative refinement process based on a combination of landmarks with similarity values is proposed. Advantageously, a very fast and robust method maybe provided.
33 Citations
10 Claims
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1. A method of registering a floating image and a reference image, the method comprising the steps of:
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selecting, by an image processing device, at least one first landmark in the floating image; selecting, by the image processing device, at least one second landmark in the reference image, wherein the at least one first landmark corresponds to the at least one second landmark; and registering, by the image processing device, the floating and reference images by using a similarity value which relates to a similarity of a first region in the floating image determined by the at least one first landmark and a second region in the reference image determined by the at least one second landmark, the registering including selecting at least one further first landmark in the floating image and at least one further second landmark in the reference image if the similarity value is less than a pre-selected value. - View Dependent Claims (2, 3)
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4. Image processing device, comprising:
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a memory for storing a floating image and a reference image; and an image processor for registering the floating image and the reference mage, wherein the image processor is adapted to perform the following operation; selecting at least one first landmark in the floating image; selecting at least one second landmark in the reference image, wherein the art least one first landmark corresponds to the at least one second landmark; and registering the floating and reference images by using a similarity value which relates to a similarity of a first region in the floating image determined by the at least one first landmark and a second region in the reference image determined by the at least one second landmark, the registering including selecting at least one further first landmark in the floating image and at least one further second landmark in the reference image if the similarity value is less than a pre-selected value.
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5. Computer program on a computer-readable device for registering a floating image and a reference image, wherein the computer program causes a processor to perform the following operation when the computer program is executed on the processor:
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selecting at least one first landmark in the floating image; selecting at least one second landmark in the reference image, wherein the at least one first landmark corresponds to the at least one second landmark; and registering the floating and reference images by using a similarity value which relates to a similarity of a first region in the floating image determined by the at least one first landmark and a second region in the reference image determined by the at least one second landmark, the registering including selecting at least one further first landmark in the floating image and at least one further second landmark in the reference image if the similarity value is less than a pre-selected value.
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6. A method of registering a floating image and a reference image, the method comprising the steps of:
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selecting, by an image processing device, at least one first landmark in the floating image; selecting, by the image processing device, at least one second landmark in the reference image, wherein the at least one first landmark corresponds to the at least one second landmark; and registering, by the image processing device, the floating and reference images by using a similarity value which relates to a similarity of a first region in the floating image determined by the at least one first landmark and a second region in the reference image determined by the at least one second landmark, the registering including selecting at least one further first landmark in the floating image and at least one further second landmark in the reference image as a function of a pre-selected value of the similarity value, wherein, for the floating image having a first number of dimensions, a second number of first landmarks is selected;
wherein, for the reference image having the first number of dimensions, a third number of second landmarks is selected;
wherein the second number of first landmarks determine first vertices of first simplices for determining a fourth number of regions in the floating image;
wherein the third number of second landmarks determine second vertices of second simplices for determining the fourth number of regions in the reference image;
wherein the second number is the first number plus one wherein the first and second landmarks are selected in accordance with a qualifying function; and
wherein the third number is equal to the second number. - View Dependent Claims (7, 8, 9, 10)
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Specification