3D image acquisition apparatus and method of generating depth image in the 3D image acquisition apparatus
First Claim
Patent Images
1. A method of generating a depth image, the method comprising:
- sequentially projecting a light transmission signal, which is generated from a light source, to a subject;
modulating reflected light, which is reflected by the subject, using a light modulation signal;
obtaining a first plurality of images from the modulated reflected light, the first plurality of images comprising a first group of a second plurality of images and a second group of the second plurality of images, images in the first group and images in the second group have different phases from one another;
determining that the first plurality of images comprises a motion blur image in response to a difference between a first sum of intensities of the images in the first group and a second sum of intensities of the images in the second group being greater than or equal to a predetermined value;
calculating a phase delay using a combination of the first group and the second group of the second plurality of images; and
generating a depth image based on the phase delay.
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Abstract
Provided are a three-dimensional (3D) image acquisition apparatus, and a method of generating a depth image in the 3D image acquisition apparatus. The method may include sequentially projecting a light transmission signal, which is generated from a light source, to a subject, modulating reflected light, which is reflected by the subject, using a light modulation signal, calculating a phase delay using a combination of a first plurality of images of two groups, from among a second plurality of images of all groups obtained by capturing the modulated reflected light, and generating a depth image based on the phase delay.
32 Citations
22 Claims
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1. A method of generating a depth image, the method comprising:
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sequentially projecting a light transmission signal, which is generated from a light source, to a subject; modulating reflected light, which is reflected by the subject, using a light modulation signal; obtaining a first plurality of images from the modulated reflected light, the first plurality of images comprising a first group of a second plurality of images and a second group of the second plurality of images, images in the first group and images in the second group have different phases from one another; determining that the first plurality of images comprises a motion blur image in response to a difference between a first sum of intensities of the images in the first group and a second sum of intensities of the images in the second group being greater than or equal to a predetermined value; calculating a phase delay using a combination of the first group and the second group of the second plurality of images; and generating a depth image based on the phase delay. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of generating a depth image, the method comprising:
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sequentially projecting a light transmission signal, which is generated in a light source, to a subject; modulating reflected light, which is reflected by the subject, using a light modulation signal; obtaining a first image corresponding to 0 degrees, a second image corresponding to 180 degrees, a third image corresponding to 90 degrees, and a fourth image corresponding to 270 degrees, wherein 0 degrees, 180 degrees, 90 degrees, and 270 degrees are phases of the modulated reflected light; determining whether a motion blur image generated by motion of the subject is present by determining whether a difference between a first sum of images in a first group which comprises the first image and the second image and a second sum of images in a second group which comprises the third image and the fourth image is equal to or greater than a first critical value; determining, when there is a motion blur image, a group including the motion blur image by comparing a difference of images in the first group and a difference of images in the second group, and restoring the images of the group including the motion blur image using images of the other group; calculating a phase delay using the images of the other group and the images of the restored group; and generating a depth image based on the phase delay.
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10. A three-dimensional (3D) image acquisition apparatus comprising:
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a light source configured to sequentially project a light transmission signal to a subject; a light modulator configured to modulate reflected light which is reflected by the subject, using a light modulation signal having a gain waveform; a capturing device configured to capture the modulated reflected light, which is modulated by the light modulator, to generate a first plurality of images comprising a first group of a second plurality of images and a second group of the second plurality of images, images in the first group and images in the second group have different phases from one another; and a depth image processor configured to determine that the first plurality of images comprises a motion blur image in response to a difference between a first sum of intensities of the images in the first group and a second sum of intensities of the images in the second group being greater than or equal to a predetermined value, calculate a phase delay using a combination of the first group and the second group of the second plurality of image, and generate a depth image based on the phase delay. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of restoring an image which includes motion blur, the method comprising:
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determining whether a motion blur image occurs in a reflected light signal by determining whether a difference between a first sum of images in a first group and a second sum of images in a second group is equal to or greater than a first critical value; determining a group which comprises the motion blur image by comparing a difference of images in the first group and a difference of images in the second group in response to the motion blur image occurring in the reflected light signal; and restoring images of the group which comprises the motion blur image using images of the other group which is not the group comprising the motion blur image, wherein the first group comprises a first image and a second image of the reflected light signal, and the second group comprises a third image and a fourth image of the reflected light signal, and wherein the first image, the second image, the third image, and the fourth image each have different phases. - View Dependent Claims (20, 21, 22)
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Specification