Interaction using a handheld projector

2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'05) - Workshops, 2005

We describe a new steerable projector, whose projection center precisely corresponds with its rotation center, which we call a "fixed-center pan-tilt (FC-PT) projector. " This mechanism allows it be set up more easily to display graphics precisely on the planes in the environment than for other steerable projectors; wherever we would like to display graphics, all we have to do are locating the FC-PT projector in the environment, and directing it to the corners of the planes whose 2D sizes have been measured. Moreover, as the FC-PT projector can recognize automatically whether each plane is connected to others, it can display visual information that lies across the boundary line of two planes in a similar way to a paper poster folded along the planes.

The main motive of this paper is to describe touch projector technology and how it can be untilise. This paper's intention is to give information about new technology which allows projection on any surface using very small device. This paper also contains briefs history of touch projector technology and describes the review of resent devices used as touch projector. It also illustrates and focuses on their uses in conferences, education, entertainment and business. Additionally this paper also details about some point such as surface, return value and battery are required some enhancement.

2001

Abstract We describe a calibration and rendering technique for a projector that can render rectangular images under keystoned position. The projector utilizes a rigidly attached camera to form a stereo pair. We describe a very easy to use technique for calibration of the projector-camera pair using only black planar surfaces. We present an efficient rendering method to pre-warp images so that they appear correctly on the screen, and show experimental results.

This thesis describes a novel multiple steerable projector system that can display an image anywhere on surfaces in a wide environment. The system can not only display an undistorted image but also control the image's position and size precisely. In addition, by operating the multiple projectors simultaneously, the system can show an image larger or brighter than the capacity of a single projector by tiling or overlaying projected images. These properties enable the system to be utilized in a variety of applications: visual annotations on objects and places, human navigation, a flexible screen for lectures, remote instructions, color and texture simulations of non-textured surfaces, and many other augmented reality (AR) applications. To realize such a projection system, it is necessary first to implement a steerable projector and calibrate it precisely. Calibration has been difficult and unstable,however, because conventional steerable projectors had much more complicated structures than fixed ones. In this thesis, a new structure is proposed, whose projection center corresponds precisely with its rotation center, so that the projection center does not move whichever direction it is oriented in. This unique structure reduces the parameters of the projector and enables its intrinsic calibration to be correct and stable. An extrinsic calibration method is also proposed, which is easy and effective as long as the image is projected onto planar

Proceedings of the 4th International Symposium on Pervasive Displays, 2015

Emerging research and growing use of mobile projectors reveal a need for better understanding of how to design interaction with such devices. This paper examines key aspects affecting the use of mobile projectors during motion. With the help of two prototypes we explore visibility issues of mobile projectors, in particular how surface colors and geometry affect the visibility of projected information. We then consider the choice of placement of information in the human field of view in the context of peripersonal and extrapersonal spaces. Finally, we raise the issue of body mount location and design implications of long-term use of this type of pervasive display. The paper presents two design explorations using projected displays to address projection on outdoor regular surfaces (snow) and projection on indoor irregular surfaces (indoor and outdoor), in the form of useable prototypes presenting map navigation. Use of the prototypes was explored in various contexts, leading to insights into the limitations and possibilities of such displays. These insights are presented in a set of design considerations intended to inform designers of future mobile projector applications.

Isprs Journal of Photogrammetry and Remote Sensing, 1999

In close-range applications, digital methods are increasingly used. In addition to the software and techniques which were adopted from aerial photogrammetry, new strategies for the restitution and presentation of digital data have been developed. The 'Digital Projector' is a strictly photogrammetric approach using raytracing techniques and off-the-shelf software to provide 3D models with complete texture. It works regardless of the shape of the object while allowing digital presentation Ž . Ž . 'photomodels' with numerous derivative results e.g., orthoimages and animations . q

2000

Abstract When a projector is oblique with respect to a planar display surface, it creates keystoning and the projected image is distorted. We present a rendering technique to display perspectively correct images for a moving user. This allows using roughly aligned projectors and eliminates the need for frequent electro-mechanical adjustments. The rendering process has no additional cost and can be implemented with traditional graphics hardware.

2007 IEEE Conference on Computer Vision and Pattern Recognition, 2007

This paper proposes a method for precise overlapping of projected images from multiple steerable projectors. When they are controlled simultaneously, two problems are revealed: (1) even a slight positional error of the projected image, which does not matter in the case of a single projector, causes misalignments of multiple projected images that can be perceived clearly when using multiple projectors; and (2) as the projectors usually do not have architectures for their synchronization it is impossible to display a moving image that is by tiling or overlaying precisely the multiple projected images. To overcome (1), a method is proposed that measures preliminarily the misalignments through every plane in the environment, and hence displays the image without the misalignment. For (2), a consideration and a new proposal for the synchronization of multiple projectors are also discussed.

2002

Light projectors as a display medium present unique benefits and challenges. They have long been used to create rich and vivid images for presentations or to project movies for large audiences with moving images and brilliant colors for entertainment. Thanks to the rapidly decreasing size and cost, projectors are now increasingly being used for interactive computer graphics applications.

2019

Aspects of the present disclosure are directed to a projection device that projects images onto surfaces and detects interactions with the images on the surfaces. For example, the projection device can include a projector that can project images onto a surface, a camera that can capture imagery of user interactions with the images on the surface, and a processing system (e.g., that includes one or more machine-learned models) that can process the imagery to understand the user interactions, thereby receiving user input. The images projected onto the surface can include still images, moving images, or a user interface that includes elements with which a user can interact. For example, the projection device can receive data descriptive of the user interface of a mobile device (e.g., smartphone) and can project the mobile device's interface onto the surface of a table, thereby allowing a user to interact with the mobile device interface on the surface of the table. By projecting content in this fashion, the projection device makes the projected information more convenient, glanceable, ambient, and delightful. In particular, the projection device explores the relationship between surfaces, content, and objects and can serve, among other applications, as an augmented reality user interface which turns tables, shelves, floors, and/or ceilings into surfaces to paint in with glanceable, meaningful information and interfaces. The projection devices described herein take augmented/digital technology, apply it to the physical world, and translate this logic back in real-time. As one example application, the projection device can be used to play a drawing game in which an artificial intelligence system attempts to identify an object drawn by a user. For example, the projection device can project a word describing an object onto a piece of paper or other surface 2 Daniels et al.