What are some authors who consider to solve the problem of matching from singular points?

Some authors consider to solve the problem of matching from singular points, i.e. ®nding points in both image planes with more or less the same neighbourhood characteristics, classifying them as corners and vertexes.

What is the purpose of the HSI model?

With this goal, the authors have used a realtime pre-processor composed by three (256 Kbytes) LUTs which are addressed by an 18 bits bus, 6 bits per each RGB channel, at video rate, obtaining the transformation from the three basic colours to the HSI model.

Why is the identi®cation of the neighbours difficult?

due to an absence of links among dot neighbours, the identi®cation of the neighbours of a given dot is highly determined by the measuring scene.

What is the average of correctly identi®ed intersections?

Of course, the utilisation of a digital light projector with a higher resolution, or even a more powerful lamp, will increase the average of correctly identi®ed intersections.

How many mm of error are measured?

The average values of the error deviate 0.728 mm (0.31%) from the X axes, 0.624 mm (0.27%) from the Y axes, and 0.465 mm (0.20%) from the Z axes.

What is the simplest method to calibrate a camera?

In order to calibrate the camera each plane is composed by a set of equidistant squares, obtaining a pattern like the one shown in Tsai (1987).

What is the PII of the image plane?

PII: S 0 1 6 7 - 8 6 5 5 ( 9 8 ) 0 0 0 8 5 - 3correspondence from the two-dimensional space of the image plane into the one-dimensional one of the epipolar line.

Open AccessJournal Article10.1016/S0167-8655(98)00085-3

A robust-coded pattern projection for dynamic 3D scene measurement

Joaquim Salvi, +2 more

- 01 Sep 1998

- Pattern Recognition Letters

- Vol. 19, Iss: 11, pp 1055-1065

208

TL;DR: A new coded structured light pattern is presented which permits to solve the correspondence problem by a single shot and without using geometrical constraints, and permits a rapid and robust 3D scene measurement, even with moving objects.

About: This article is published in Pattern Recognition Letters. The article was published on 01 Sep 1998. and is currently open access. The article focuses on the topics: Structured light & Projection (set theory).

AI Agents for this Paper

Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps

Most frequently asked questions

1. What are the contributions mentioned in the paper "A robust-coded pattern projection for dynamic 3d scene measurement" ?

This paper presents a new coded structured light pattern which permits to solve the correspondence problem by a single shot and without using geometrical constraints.. The pattern is composed by the projection of a grid made by coloured slits in such a way that each slit with its two neighbours appears only once in the pattern.

2. What are the future works in "A robust-coded pattern projection for dynamic 3d scene measurement" ?

As a further work, the authors are interested in the frequency shifting of the imaging colour with respect to the projecting one as a result of the intrinsic colour of the measuring objects.

3. What is important in the HSI cone?

what is important is that the authors must chose well-spaced colours in the HSI cone, through which they can be well segmented using their hue and saturation components.

4. What are some applications of the sensor?

Some applications of the sensor could, in particular, be used within the scope of scene interpretation in mobile robot navigation and tracking of moving objects, and, in general, in any 3D scene measurement where a single shot is allowed and a quick response of the system is required.

Table 1 Intrinsic and extrinsic parameters obtained by the process of calibration

Fig. 4. A sample showing two cross-points detection. (a) A portion of the Intensity image showing three slits. (b) The segmented regions of both cross-points obtained by local thresholding.

Fig. 3. Segmentation and edge reconstruction of blue colour.

Fig. 9. The reconstruction of the mask shown in Fig. 8.

Fig. 5. (a) A real scene composed by three geometric objects (not used to infer 3D information). (b) The scene illuminated by the coloured pattern.

Citations

•Journal Article•10.1016/J.PATCOG.2003.10.002

Pattern codification strategies in structured light systems

Joaquim Salvi, +2 more

- 01 Apr 2004

- Pattern Recognition

TL;DR: A new and definitive classification of patterns for structured light sensors is presented, based on projecting a light pattern and viewing the illuminated scene from one or more points of view, for recovering the surface of objects.

...read moreread less

1.4K

Journal Article•10.1016/J.PATCOG.2010.03.004

A state of the art in structured light patterns for surface profilometry

Joaquim Salvi, +3 more

- 01 Aug 2010

- Pattern Recognition

TL;DR: An up-to-date review and a new classification of the existingShape reconstruction using coded structured light techniques and their potentials are presented.

...read moreread less

934

•Journal Article•10.1016/S0031-3203(01)00126-1

A comparative review of camera calibrating methods with accuracy evaluation

Joaquim Salvi, +2 more

- 01 Jul 2002

- Pattern Recognition

TL;DR: This article presents a detailed review of some of the most used calibrating techniques in which the principal idea has been to present them all with the same notation.

...read moreread less

586

•Journal Article•10.1016/J.CULHER.2006.10.007

Methods for 3D digitization of Cultural Heritage

George Pavlidis, +4 more

- 01 Jan 2007

- Journal of Cultural Heritage

TL;DR: Methods for three-dimensional digitization that are applicable to cultural heritage recording are reviewed.

...read moreread less

477

Patent

3d geometric modeling and motion capture using both single and dual imaging

Eyal Gordon, +1 more

- 22 Nov 2011

TL;DR: In this article, a bi-dimensional coded light pattern is projected on the object such that each of the identifiable feature types appears at most once on predefined sections of distinguishable epipolar lines.

...read moreread less

318

...

Expand

References

Journal Article•10.1109/JRA.1987.1087109

A versatile camera calibration technique for high-accuracy 3D machine vision metrology using off-the-shelf TV cameras and lenses

Roger Y. Tsai

- 01 Aug 1987

TL;DR: In this paper, a two-stage technique for 3D camera calibration using TV cameras and lenses is described, aimed at efficient computation of camera external position and orientation relative to object reference coordinate system as well as the effective focal length, radial lens distortion, and image scanning parameters.

...read moreread less

6.3K

•Book

A versatile camera calibration technique for high-accuracy 3D machine vision metrology using off-the-shelf TV cameras and lenses

Roger Y. Tsai

- 03 Jan 1992

TL;DR: A new technique for three-dimensional camera calibration for machine vision metrology using off-the-shelf TV cameras and lenses using two-stage technique has advantage in terms of accuracy, speed, and versatility over existing state of the art.

...read moreread less

6.1K

•Proceedings Article

Three-dimensional computer vision: a geometric viewpoint

Olivier Faugeras

- 31 Dec 1993

TL;DR: Results from constrained optimization some results from algebraic geometry differential geometry are shown.

...read moreread less

3.4K

Journal Article•10.1109/34.159901

Camera calibration with distortion models and accuracy evaluation

Juyang Weng, +2 more

- 01 Oct 1992

- IEEE Transactions on Pattern Analysis an...

TL;DR: A camera model that accounts for major sources of camera distortion, namely, radial, decentering, and thin prism distortions is presented and a type of measure is introduced that can be used to directly evaluate the performance of calibration and compare calibrations among different systems.

...read moreread less

•Journal Article•10.1093/COMJNL/38.1.85

Three-Dimensional Computer Vision: A Geometric Viewpoint

P. K. Ghosh, +1 more

- 01 Jan 1995

- The Computer Journal

1.5K

...

Expand

A robust-coded pattern projection for dynamic 3D scene measurement

Chat with Paper

AI Agents for this Paper

Most frequently asked questions

1. What are the contributions mentioned in the paper "A robust-coded pattern projection for dynamic 3d scene measurement" ?

2. What are the future works in "A robust-coded pattern projection for dynamic 3d scene measurement" ?

3. What is important in the HSI cone?

4. What are some applications of the sensor?

5. What are some authors who consider to solve the problem of matching from singular points?

6. What is the purpose of the HSI model?

7. Why is the identi®cation of the neighbours difficult?

8. What is the average of correctly identi®ed intersections?

9. How many mm of error are measured?

10. What is the simplest method to calibrate a camera?

11. What is the PII of the image plane?

Figures

Citations

Pattern codification strategies in structured light systems

A state of the art in structured light patterns for surface profilometry

A comparative review of camera calibrating methods with accuracy evaluation

Methods for 3D digitization of Cultural Heritage

3d geometric modeling and motion capture using both single and dual imaging

References

A versatile camera calibration technique for high-accuracy 3D machine vision metrology using off-the-shelf TV cameras and lenses

A versatile camera calibration technique for high-accuracy 3D machine vision metrology using off-the-shelf TV cameras and lenses

Three-dimensional computer vision: a geometric viewpoint

Camera calibration with distortion models and accuracy evaluation

Three-Dimensional Computer Vision: A Geometric Viewpoint

Related Papers (5)

Rapid shape acquisition using color structured light and multi-pass dynamic programming

Pattern codification strategies in structured light systems

Structured light using pseudorandom codes

Range image acquisition with a single binary-encoded light pattern

Range imaging with adaptive color structured light