A feature-based stereo model using disparity histogram of multi-resolution channels.

Nishimoto, Yoshiro; Shirai, Yoshiaki

doi:10.7210/jrsj.4.607

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…Many efforts have been made to develop a stereo system with a single camera. Some studies [2,3] employed a lens system based on a glass plate placed in front of the camera. The rotation and the different refraction paths through the glass plate allow us to capture two images with different angles; however it has only applicable to static analysis.…”

Section: Measurement Science and Technologymentioning

confidence: 99%

Optical low-cost and portable arrangement for full field 3D displacement measurement using a single camera

López‐Alba

Felipe-Sesé

Schmeer

et al. 2016

Meas. Sci. Technol.

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In the current paper, an optical low-cost system for 3D displacement measurement based on a single camera and 3D digital image correlation is presented. The conventional 3D-DIC set-up based on a two-synchronized-cameras system is compared with a proposed pseudo-stereo portable system that employs a mirror system integrated in a device for a straightforward application achieving a novel handle and flexible device for its use in many scenarios. The proposed optical system splits the image by the camera into two stereo images of the object. In order to validate this new approach and quantify its uncertainty compared to traditional 3D-DIC systems, solid rigid in and out-of-plane displacements experiments have been performed and analyzed. The differences between both systems have been studied employing an image decomposition technique which performs a full image comparison. Therefore, results of all field of view are compared with those using a stereoscopy system and 3D-DIC, discussing the accurate results obtained with the proposed device not having influence any distortion or aberration produced by the mirrors. Finally, the adaptability of the proposed system and its accuracy has been tested performing quasi-static and dynamic experiments using a silicon specimen under high deformation. Results have been compared and validated with those obtained from a conventional stereoscopy system showing an excellent level of agreement.

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Section: Measurement Science and Technologymentioning

confidence: 99%

Optical low-cost and portable arrangement for full field 3D displacement measurement using a single camera

López‐Alba

Felipe-Sesé

Schmeer

et al. 2016

Meas. Sci. Technol.

View full text Add to dashboard Cite

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A multistage stereo method giving priority to reliable matching

Yamaguchi

Shirai

Nakayama

et al. 1992

Systems & Computers in Japan

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SUMMARYThe main problem with stereo vision is the method of searching for corresponding points in the left and right images. The correspondence problem becomes especially difficult in the case of complex scenes because many corresponding candidates are found for a weak feature point.Thls paper proposes a multistage stereo method which determines the more reliable matching pairs first and later those less reliable, with the latter determined based on the first result. A feature point is a zero-crossing point (ZC). If the contrast is high at a ZC, then the position and the direction of the ZC are clearly determined and the matching result is also reliable. Therefore, the proposed methood determines first the correspondence of ZCs with higher contrast. For each ZC in the left image, the corresponding candidates in the right image are those with a similar contrast and direction. For ZCs in a small region in the left image, a histogram of the disparity of all the matching pair candidates is obtained and the disparity of the region is determined by the profile of the histogram. Once the disparity of the window is obtained, the disparity of each ZC in the region is determined. After the forementioned processing is finished, a similar processing is repeated for ZCs with lower contrasts. Experiments with complicated indoor scenes proved that the proposed method is better than a conventional single-stage method.

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A feature-based stereo model using disparity histogram of multi-resolution channels.

Cited by 2 publications

References 4 publications

Optical low-cost and portable arrangement for full field 3D displacement measurement using a single camera

Optical low-cost and portable arrangement for full field 3D displacement measurement using a single camera

A multistage stereo method giving priority to reliable matching

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