Automatic calibration of a single-projector catadioptric display system

Astre, B.; Sarry, Laurent; Lohou, Christophe; Zéghers, Eric

doi:10.1109/cvpr.2008.4587788

Cited by 5 publications

(12 citation statements)

References 10 publications

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“…To correct geometric distortions on arbitrary surfaces, approaches based on structured light patterns have been proposed [3][4][5][6][7][8][9]. These methods project structured light pattern images on non-planar surfaces and captured the projected patterns by using RGB cameras.…”

Section: Correction Of Projection Distortionmentioning

confidence: 99%

“…We also tested the correction accuracy as we projected and corrected horizontal/vertical line images in Figure 10 and measured the straightness of the lines on the corrected image. Finally, to verify the speed of the distortion correction method, which is essential to our DIW system, we performed a comparison evaluation for the correction time of each image with the methods in [7,9].…”

Section: Quantitative Evaluationsmentioning

confidence: 99%

“…Although there are many distortion-correction methods for projection, the existing methods hardly correct the distortions present in dynamic non-planar surfaces. In fact, they mainly project the structure patterns on surfaces to extract and match features using RGB cameras and find distortions in a reconstructed 3D space [3][4][5][6][7][8][9]. However, it is difficult to cope with dynamic distortion because the projector may generate patterns that interfere with viewing of the screen contents.…”

Section: Introductionmentioning

confidence: 99%

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Display In the Wild (DIW): An Adaptive Projection-Imaging System to Screen Geometry in Real Time

Ryu

Bae

2018

Preprint

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TVs and monitors are among the most widely used displays in various environments. However, they have limitations in their physical display conditions, such as a fixed size/position and a rigid/flat space. In this paper, we suggest a new "Display In the Wild" (DIW) concept to overcome the aforementioned problems. Our proposed DIW system allows us to display a flexibly large screen on dynamic non-planar surfaces at an arbitrary display position. To implement our DIW concept practically, we choose a projector as the hardware configuration in order to a generate screen anywhere with different sizes. However, distortion occurs when the projector displays content on a surface that is dynamic and/or non-planar. Therefore, we propose a distortion correction method for DIW to overcome the aforementioned surface-constraints. Since projectors are not capture devices, we propose using a depth camera to determine the distortions on the surfaces quickly. We also propose DIW-specific calibration and fast/precise correction methods. Our calibration method is constructed to easily and quickly detect the projection surface, and also allows our proposed system to accommodate the intrinsic parameters such as a display resolution and field of view. We accomplish a fast undistortion process of the projector by considering only surface boundary pixels, which enables our method to run in real time. In our comprehensive experiments, the proposed DIW system generates undistorted screens such as TVs and monitors on dynamic non-planar surfaces at an arbitrary display position with Unmanned Aerial Vehicles (UAVs) in a fast and accurate manner, demonstrating its usefullness in practical DIW scenarios.

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Section: Correction Of Projection Distortionmentioning

confidence: 99%

Section: Quantitative Evaluationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Display In the Wild (DIW): An Adaptive Projection-Imaging System to Screen Geometry in Real Time

Ryu

Bae

2018

Preprint

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“…More precisely, the system has to be calibrated geometrically (relative positions and orientations of devices, geometry of the room), optically (distortions of optics) and radiometrically (light scattering, spectral responses of devices). In this paper, we deal with radiometric compensation and consider that geometrical and optical calibrations have been done [Astre et al 2008]. Thus, we know onto which triangle of the room geometry, each pixel is projected.…”

Section: Catopsys Projection Systemmentioning

confidence: 99%

“…1). Once in a room, the system calibrates automatically the geometry of its components and of the room [Astre et al 2008]. Immersive projection can then be done.…”

Section: Introductionmentioning

confidence: 99%

Radiometric compensation for a low-cost immersive projection system

Dehos

Zéghers

Renaud

et al. 2008

Proceedings of the 2008 ACM Symposium on Virtual Reality Software and Technology

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International audienceCatopsys is a low-cost projection system aiming at making mixed reality (virtual, augmented or diminished reality) affordable. It combines a videoprojector, a camera and a convex mirror and works in a non-specific room. This system displays an immersive environment by projecting an image onto the different parts of the room. However, the presence of an uncalibrated projector, heterogeneous materials and light inter-reflections influence the colors of the environment displayed in the room. Radiometric compensation of the projection process enables the system to reduce this problem. In this paper, we present our low-cost immersive projection system and propose a radiometric model and a compensation method which handle the projector response, surface materials and inter-reflections between surfaces. Our method works in two stages. First, the radiometric response of the projection process is evaluated. Then, this radiometric response is used to compensate the projection process in the desired environments

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Immersive front-projection analysis using a radiosity-based simulation method

et al. 2013

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International audienceVideo projectors are designed to project onto flat white diffuse screens. Over the last few years, projector-based systems have been used, in virtual reality applications, to light non-specific environments such as the walls of a room. However, in these situations, the images seen by the user are affected by several radiometric disturbances, such as interreflection. Radiometric compensa tion methods have been proposed to reduce the disturbance caused by interreflection, but nothing has been proposed for evaluating the phenomenon itself and the effectiveness of compensation methods. In this paper, we propose a radiosity-based method to simulate light transfer in immersive environments, from a projector to a camera (the camera gives the image a user would see in a real room). This enables us to evaluate the disturbances resulting from interreflection. We also consider the effectiveness of interreflection compensation and study the influence of several parameters (projected image, projection onto a small or large part of the room, reflectivity of the walls). Our results show that radiometric compensation can reduce the influence of interreflection but is severely limited if we project onto a large part of the walls around the user, or if all the walls are bright

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Automatic calibration of a single-projector catadioptric display system

Cited by 5 publications

References 10 publications

Display In the Wild (DIW): An Adaptive Projection-Imaging System to Screen Geometry in Real Time

Display In the Wild (DIW): An Adaptive Projection-Imaging System to Screen Geometry in Real Time

Radiometric compensation for a low-cost immersive projection system

Immersive front-projection analysis using a radiosity-based simulation method

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