Method and apparatus for matching color image and depth image
First Claim
1. An image matching method comprising:
- obtaining a depth image and an intensity image of an object using a real depth camera installed at a first position with a first viewpoint and obtaining a color image of the object using a real color camera installed at a second position with a second viewpoint other than the first viewpoint;
transforming each of the obtained depth image and the intensity image into a depth image and an intensity image, respectively, that could be obtained if the object were photographed by a camera at the second position with the second viewpoint; and
matching the transformed depth image and intensity image with the obtained color image,wherein the transforming of the obtained depth image and intensity image comprises;
calculating the coordinates of each pixel of the image that could be obtained if the object were photographed by a camera at the second position based on a distance between the first viewpoint and the second viewpoint, corresponding to each pixel forming the obtained depth image and intensity image, by using a depth value according to the obtained depth image.
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Abstract
A method and apparatus for matching images are provided. The image matching method includes: obtaining a depth image and an intensity image of an object using a depth camera installed at a first position and a color image of the object using a color camera installed at a second position other than the first position; transforming the obtained depth image and intensity image into a depth image and an intensity image, respectively, that could be obtained if the object were photographed by a camera at the second position; and matching the transformed depth image and intensity image and the obtained color image. In this way, a depth image and intensity image obtained separately from a 2-dimensional (2D) color image can be accurately matched to the 2D color image, thereby allowing a reliable 3D image to be obtained.
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Citations
13 Claims
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1. An image matching method comprising:
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obtaining a depth image and an intensity image of an object using a real depth camera installed at a first position with a first viewpoint and obtaining a color image of the object using a real color camera installed at a second position with a second viewpoint other than the first viewpoint; transforming each of the obtained depth image and the intensity image into a depth image and an intensity image, respectively, that could be obtained if the object were photographed by a camera at the second position with the second viewpoint; and matching the transformed depth image and intensity image with the obtained color image, wherein the transforming of the obtained depth image and intensity image comprises; calculating the coordinates of each pixel of the image that could be obtained if the object were photographed by a camera at the second position based on a distance between the first viewpoint and the second viewpoint, corresponding to each pixel forming the obtained depth image and intensity image, by using a depth value according to the obtained depth image. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An image matching method comprising:
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obtaining a depth image and an intensity image of an object using a depth camera installed at a first position and a color image of the object using a color camera installed at a second position other than the first position; transforming the obtained depth image and intensity image into a depth image and an intensity image, respectively, that could be obtained if the object were photographed by a camera at the second position; and matching the transformed depth image and intensity image and the obtained color image, wherein the transforming of the obtained depth image and intensity image comprises; calculating the coordinates of each pixel of the image that could be obtained if the object were photographed by a camera at the second position, corresponding to each pixel forming the obtained depth image and intensity image, by using the depth value according to the obtained depth image; and by using the calculated coordinates of each pixel, calculating the depth value and intensity value corresponding to each integer coordinate, and generating a depth image and intensity image according to the calculated depth values and intensity values, and thus transforming the obtained depth image and intensity image into the depth image and intensity image, respectively, that could be obtained if the object were photographed by a camera at the second position, wherein in the generating of the depth image and intensity image, the depth value corresponding to each integer coordinate is calculated by using coordinates of a predetermined number of pixels from among the calculated pixels, and a depth image is generated according to the calculated depth values, and the intensity value corresponding to each integer coordinate is calculated by using coordinates of a predetermined number of pixels from among the calculated pixels, and an intensity image is generated according to the calculated intensity values.
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8. An image matching apparatus comprising:
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a real depth camera installed at a first position with a first viewpoint so as to obtain a depth image and an intensity image of an object; a real color camera installed at a second position with a second viewpoint other than the first viewpoint so as to obtain a color image of the object; an image transform unit transforming each of the obtained depth image and intensity image into a depth image and intensity image, respectively, that could be obtained if the object were photographed by a camera at the second position with the second viewpoint; and an image matching unit matching the transformed depth image and intensity image and the obtained color image, wherein the image transform unit comprises; a coordinate calculation unit calculating the coordinates of each pixel of the image that could be obtained if the object were photographed by a camera at the second position based on a distance between the first viewpoint and the second viewpoint, corresponding to each pixel forming the obtained depth image and intensity image, by using a depth value according to the obtained depth image. - View Dependent Claims (9, 10, 11, 12)
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13. An image matching apparatus comprising:
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a depth camera installed at a first position so as to obtain a depth image and an intensity image of an object; a color camera installed at a second position other than the first position so as to obtain a color image of the object; an image transform unit transforming the obtained depth image and intensity image into a depth image and intensity image, respectively, that could be obtained if the object were photographed by a camera at the second position; and an image matching unit matching the transformed depth image and intensity image and the obtained color image, wherein the image transform unit transforms the obtained depth image and intensity image into a depth image and intensity image, respectively, that could be obtained if the object were photographed by a camera at the second position, by using a depth value according to the obtained depth image, wherein the image transform unit comprises; a coordinate calculation unit calculating the coordinates of each pixel of the image that could be obtained if the object were photographed by a camera at the second position, corresponding to each pixel forming the obtained depth image and intensity image, by using the depth value according to the obtained depth image; and a depth image/intensity image generation unit, by using the calculated coordinates of each pixel, calculating the depth value and intensity value corresponding to each integer coordinate, and generating a depth image and intensity image according to the calculated depth values and intensity values, wherein the depth image/intensity image generation unit calculates the depth value corresponding to each integer coordinate by using coordinates of a predetermined number of pixels from among the calculated pixels, and generates a depth image according to the calculated depth values, and calculates the intensity value corresponding to each integer coordinate by using coordinates of a predetermined number of pixels from among the calculated pixels, and generates an intensity image according to the calculated intensity values.
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Specification