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Transmission of affine-invariant spatial mask for active depth sensing

A mask and transmitter technology, applied in the field of emission of affine invariant spatial masks for active depth sensing, can solve problems such as distortion, inability to accurately identify patterns of spatial masks, pattern distortion, etc.

Active Publication Date: 2015-01-14
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Most scenes or objects have different depths, causing distortion of the pattern in the spatial mask
That is, when a spatial mask is projected onto a scene or object, the curves, depth, shape of the scene or object distort parts of the pattern projected onto it
Such distortions tend to make it impossible to accurately identify the pattern of the spatial mask

Method used

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  • Transmission of affine-invariant spatial mask for active depth sensing
  • Transmission of affine-invariant spatial mask for active depth sensing
  • Transmission of affine-invariant spatial mask for active depth sensing

Examples

Experimental program
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Embodiment Construction

[0059] In the following description, specific details are given to provide a thorough understanding of the embodiments. However, it will be understood by those skilled in the art that the described embodiments may be practiced without these specific details. For example, circuits may be shown in block diagrams in order not to obscure the embodiments in unnecessary detail. In other instances, well-known circuits, structures and techniques may not be shown in detail in order not to obscure the described embodiments.

[0060] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation or example described herein as "exemplary" should not necessarily be construed as preferred or advantageous over other examples. Likewise, the term "embodiments" does not require that all embodiments include the discussed feature, advantage or mode of operation.

[0061] overview

[0062] The first feature provides a spatial mask that is i...

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Abstract

A method for generating codes for a code mask is provided. A plurality of symbols may be arranged into an n1 by n2 symbol structure, where n1 and n2 are integer values. A plurality of codewords may be defined from different overlapping k1 by k2 windows within the symbol structure, wherein co-linear and spatially overlapping windows define unique codewords, and the codewords are unique in a first direction of the symbol structure but are repeated in a second direction that is perpendicular to the first direction. A plurality of the symbol structures as a code mask, wherein symbols in two adjacent k1 by k2 windows are selected so as to avoid codeword aliasing of codewords in the two adjacent k1 by k2 windows.

Description

[0001] Cross References to Related Applications [0002] This patent application asserts U.S. Provisional Application No. 61 / 651,528 filed May 24, 2012, U.S. Provisional Application No. 61 / 651,529 filed May 24, 2012, U.S. Provisional Application No. 61 / 651,529 filed May 24, 2012, U.S. Provisional Application No. 61 / 651,533, U.S. Provisional Application No. 61 / 651,535 filed May 24, 2012, U.S. Provisional Application No. 61 / 666,405 filed June 29, 2012, and U.S. Provisional Application No. 61 / 666,405 filed June 29, 2013 Priority to U.S. Nonprovisional Application No. 13 / 785,797 filed on . technical field [0003] Various features relate to active depth sensing, and more specifically, techniques to account for distortion of spatial masks used for depth sensing. Background technique [0004] In active sensing, a spatial mask comprising known patterns is illuminated or projected onto a scene or object. The structure of the pattern projected onto a scene or object typically enco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/25G06T7/00H04N5/14
CPCG06T5/001G01B11/254G01B11/2545H04B1/12G01B11/2513G06T7/521G06T5/00
Inventor 卡林·米特科夫·阿塔纳索夫詹姆斯·威尔逊·纳什维卡斯·拉马钱德兰塞尔久·拉杜·戈马
Owner QUALCOMM INC