Method and system for calculating a displacement of an object of interest
First Claim
1. A method of calculating a displacement of an object of interest, comprising a step of calculating, with a processor, a displacement model of said object of interest from adjacent images of a set of pre-acquired images of said object of interest, said displacement model being periodical and reflecting the position of said object of interest along the time, characterize in that said method further comprising:
- a step of determining, with the processor, a first sub-set of images from said set of pre-acquired images within one periodical time cycle of said set of pre-acquired images on the basis of the displacement model;
a first step of identifying, with the processor, a second sub-set of images from newly-acquired images, wherein images in said second sub-set of images are consecutive and have the same most similar image in said first sub-set of images, wherein a set of similarity levels is determined by comparing a given image in said newly acquired images with each image of said first sub-set of images, and wherein said most similar image has the largest similarity level in said set of similarity levels;
a first step of selecting, with the processor, a given image in said second sub-set of images as a first reference image;
a second step of identifying, with the processor, a third sub-set of images from said newly-acquired images, wherein images in said third sub-set of images are consecutive and have the same most similar image in said first sub-set of images, wherein a set of similarity levels is determined by comparing a given image in said newly acquired images with each image of said first sub-set of images, wherein said most similar image has the largest similarity level in said set of similarity levels, and wherein the same most similar image which the images in the third sub-set of images have is different from the same most similar image which the images in the second sub-set of images have;
a second step of selecting with the processor, a given image in said third sub-set of images as a second reference image;
a step of calculating, with the processor, the displacement between said second reference image and said first reference image.
0 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a method of calculating a displacement of an object of interest comprising a step of calculating (101) a displacement model of said object of interest from adjacent images of a set of pre-acquired images of said object of interest, said displacement model reflects the position of said object of interest along the time. The method is characterized in that the method further comprises the following. A step of determining (102) a first sub-set of images (S1) from said set of pre acquired images within one periodical time cycle of said set of pre-acquired images on the basis of the displacement model. A first step of identifying (103) a second sub-set of images (S2) from newly-acquired images, wherein images in said second sub-set of images (S2) are consecutive and have the same most similar image in said first sub-set of images (S1), wherein a first set of similarity levels is determined by comparing a given image in said newly acquired images with each image of said first sub-set of images (S1), and wherein said most similar image has the largest similarity level in said first set of similarity levels. A first step of selecting (104) a given image in said second sub-set of images (S2) as a first reference image (I1). A second step of identifying (105) a third sub-set of images (S3) from said newly-acquired images, wherein images in said third sub-set of images (S3) are consecutive and have the same most similar image in said first sub-set of images (S1), wherein a set of similarity levels is determined by comparing a given image in said newly acquired images with each image of said first sub-set of images (S1), and wherein said most similar image has the largest similarity level in said set of similarity levels. A second step of selecting (106) a given image in said third sub-set of images (S3) as a second reference image (I2). A step of calculating (107) the displacement between said second reference image (I2) and said first reference image (I1). The invention also relates to a corresponding system of displacement calculation.
16 Citations
14 Claims
-
1. A method of calculating a displacement of an object of interest, comprising a step of calculating, with a processor, a displacement model of said object of interest from adjacent images of a set of pre-acquired images of said object of interest, said displacement model being periodical and reflecting the position of said object of interest along the time, characterize in that said method further comprising:
-
a step of determining, with the processor, a first sub-set of images from said set of pre-acquired images within one periodical time cycle of said set of pre-acquired images on the basis of the displacement model; a first step of identifying, with the processor, a second sub-set of images from newly-acquired images, wherein images in said second sub-set of images are consecutive and have the same most similar image in said first sub-set of images, wherein a set of similarity levels is determined by comparing a given image in said newly acquired images with each image of said first sub-set of images, and wherein said most similar image has the largest similarity level in said set of similarity levels; a first step of selecting, with the processor, a given image in said second sub-set of images as a first reference image; a second step of identifying, with the processor, a third sub-set of images from said newly-acquired images, wherein images in said third sub-set of images are consecutive and have the same most similar image in said first sub-set of images, wherein a set of similarity levels is determined by comparing a given image in said newly acquired images with each image of said first sub-set of images, wherein said most similar image has the largest similarity level in said set of similarity levels, and wherein the same most similar image which the images in the third sub-set of images have is different from the same most similar image which the images in the second sub-set of images have; a second step of selecting with the processor, a given image in said third sub-set of images as a second reference image; a step of calculating, with the processor, the displacement between said second reference image and said first reference image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A system for calculating a displacement, said system comprising a processor configured to calculate a displacement model of said object of interest from adjacent images of a set of pre-acquired images of said object of interest, said displacement model being periodical and reflecting the position of said object of interest along the time, characterize in that said processor is further configured to:
-
determine a first sub-set of images from said set of pre-acquired images within one periodical time cycle of said set of pre-acquired images on the basis of the displacement model; identify a second sub-set of images from newly-acquired images, wherein images in said second sub-set of images are consecutive and have the same most similar image in said first sub-set of images, wherein a set of similarity levels is determined by comparing a given image in said newly acquired images with each image of said first sub-set of images, and wherein said most similar image has the largest similarity level in said set of similarity levels; select a given image in said second sub-set of images as a first reference image; identify a third sub-set of images from said newly-acquired images, wherein images in said third sub-set of images are consecutive and have the same most similar image in said first sub-set of images, wherein a set of similarity levels is determined by comparing a given image in said newly acquired images with each image of said first sub-set of images wherein said most similar image has the largest similarity level in said set of similarity levels, and wherein the same most similar image which the images in the third sub-set of images have is different from the same most similar image which the images in the second sub-set of images have; select a given image in said third sub-set of images as a second reference image; and calculate the displacement between said second reference image and said first reference image. - View Dependent Claims (12, 13, 14)
-
Specification