Method and processing system for updating a first image generated by a first camera based on a second image generated by a second camera
US-10510155-B1 · Dec 17, 2019 · US
Time-of-flight down-up sampling using a compressed guide
US2021400217A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021400217-A1 |
| Application number | US-202016908722-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jun 22, 2020 |
| Priority date | Jun 22, 2020 |
| Publication date | Dec 23, 2021 |
| Grant date | — |
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Abstract
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A method for time-of-flight (ToF) guided down-up sampling includes calculating a guide function from a full resolution output of a ToF sensor, downsampling the full resolution output by a predetermined scaling factor, calculating a downsampled depth data from the downsampled output and upsampling the downsampled depth data to full resolution using the full resolution guide function.
First claim
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What is claimed is: 1 . A method for time-of-flight (ToF) guided down-up sampling, the method comprising the steps of: calculating a guide function from a full resolution output of a ToF sensor; downsampling the full resolution output by a predetermined scaling factor; calculating a downsampled depth data from the downsampled output; and upsampling the downsampled depth data to full resolution using the full resolution guide function. 2 . The method of claim 1 , further comprising filtering the full resolution output. 3 . The method of claim 1 , further comprising: processing the downsampled output in an image signal processing (ISP) chain; and calculating a full resolution point cloud from the full resolution depth data. 4 . The method of claim 1 , wherein the output includes a set of phase measurements A 0 , A 90 , A 180 and A 270 that are samples of a correlation of a received signal and a reference signal, and are represented as four images at the full resolution output of the ToF sensor. 5 . The method of claim 4 , further comprising calculating first and second phase differences from the full resolution output, wherein the guide function is defined as A 0 + A 90 A 180 + A 270 4 , the first phase difference is defined as A 270 −A 0 and the second phase difference is defined as A 0 −A 180 . 6 . The method of claim 1 , wherein upsampling the downsampled depth data to full resolution comprises: representing the downscaled depth data in an upscaled domain according to Z ^ [ i , j ] = z d [ i a , j a ] , wherein {circumflex over (Z)} is the depth data on the upscaled domain, z d is the downscaled depth data, and α is the down-up sampling factor; and reconstructing the full resolution depth data according to Z ^ i , j = ∑ n ∈ supp i ∑ m ∈ supp j Z ^ n , m W S ( Guide n , m , Guide i , j ) Mask n , m ∑ n ∈ supp i ∑ m ∈ supp j W S ( Guide
Assignees
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Classifications
- H04N25/705Primary
Pixels for depth measurement, e.g. RGBZ · CPC title
Noise processing, e.g. detecting, correcting, reducing or removing noise · CPC title
Time delay measurement, e.g. operational details for pixel components (signal extraction and conditioning G01S7/493); Phase measurement · CPC title
- G01S17/894Primary
Three-dimensional [3D] imaging with simultaneous measurement of time-of-flight at a two-dimensional [2D] array of receiver pixels, e.g. time-of-flight cameras or flash lidar · CPC title
with phase comparison between the received signal and the contemporaneously transmitted signal · CPC title
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- What does patent US2021400217A1 cover?
- A method for time-of-flight (ToF) guided down-up sampling includes calculating a guide function from a full resolution output of a ToF sensor, downsampling the full resolution output by a predetermined scaling factor, calculating a downsampled depth data from the downsampled output and upsampling the downsampled depth data to full resolution using the full resolution guide function.
- Who is the assignee on this patent?
- Samsung Electronics Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H04N25/705. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Dec 23 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).