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This paper presents an extension of image rectification methods for an arbitrary number of views with aligned camera center. This technique can be used for stereoscopic rendering to enhance the perception comfort or for depth from stereo. In this paper, we first expose that epipolar geometry is not suited to solve this problem. Then we propose a non linear method that includes all the images in the...
We present a multi-view 3D video acquisition and its processing system for multi-view 3D television (3DTV). The proposed hybrid camera system consists of three-color cameras and one time of flight (TOF) camera. Since currently available TOF cameras do not provide color images associated with the depth image, we use a beam splitter between the color camera of the center view and the TOF camera to minimize...
We present the principal aspects and the concept of a monocular combination of a scanning 3D time-of-flight sensor with a large-scale conventional 2D image sensor. While the 2D sensor profits from the whole field of view of an F-Mount photo film format lens, the smaller-sized 3D sensor is mounted onto a highly precise XY linear move stage. Thus, by the means of macro-scanning, the 3D sensor can be...
Today, consumer cameras produce photographs with tens of millions of pixels. The recent trend in image sensor resolution seems to suggest that we will soon have cameras with billions of pixels. However, the resolution of any camera is fundamentally limited by geometric aberrations. We derive a scaling law that shows that, by using computations to correct for aberrations, we can create cameras with...
Digital compression of images, which is widely used to decrease the energy, time, and memory required for transmission and storage of video information, does not reduce the burden imposed on the analog-to-digital converters (A/Ds) employed for image quantization. Meanwhile this quantization is one of the most challenging problems in the design of large image sensors. Image quantization technique discussed...
In this paper we propose a low-complexity image stitching algorithm. By using the developed algorithm, users can automatically merge images into a panoramic image, even these source images have rotation and zooming actions. We adopt feature-base estimation to get the relation between images and employ down-sampling to reduce computing complexity. We also apply a copy-paste and texture-base scheme...
The availability of inexpensive cameras enables alternative applications beyond personal video communication. For example, surveillance of rooms and home premises is such an alternative application, which can be extended with remote viewing on hand-held battery-powered consumer devices. Scalable wavelet image/video coding is attractive for this application since the video can be scaled easily to many...
Images of folding process was collected and on-line detection of folding dislocations is explored using characteristic points in these images, which reduces the computation time. First, determine the dislocation type through characteristic points in the images of a folding process. Then, through calibration the corresponding dislocation bias for the detected type of folding dislocation can be obtained...
We present a new method for segmenting color images into their composite surfaces by combining color segmentation with model-based fitting utilizing sparse depth data, acquired using time-of-flight (Swissranger, PMD CamCube) and stereo techniques. The main target of our work is the segmentation of plant structures, i.e., leaves, from color-depth images, and the extraction of color and 3D shape information...
This paper describes a pedestrian detection method using a LRF and a small omni-view camera. In outdoor environment, the resolutions of LRFs are too low to recognize human reliably, and high resolution image requires high calculation cost for detecting walking persons. We propose a combination approach using these data. Particle filter based tracking and HOG (Histogram of Oriented Gradients) feature...
Optical Character Recognition (OCR) converts images of handwritten or printed text captured by camera or scanner into editable text. OCR has seen limited adoption in mobile platforms due to the performance constraints of these systems. Intel® Atom™ processors have enabled general purpose applications to be executed on handheld devices. In this paper, we analyze a reference implementation of the OCR...
The availability of multi-view images of a scene makes new and exciting applications possible, including Free-Viewpoint TV (FTV). FTV allows us to change viewpoint freely in a 3D world, where the virtual viewpoint images are synthesized by Image-Based Rendering (IBR). In this paper, we introduce a FTV depth estimation method for forward virtual viewpoints. Moreover, we introduce a view generation...
This paper presents a high DR, high temporal resolution, frame-free image/video camera that encodes and processes visual information in asynchronous spikes. The event-driven optical sensor features 9.3-bit grayscale imaging at up to 143dB DR and <;0.25% FPN with hardware-based lossless video compression and time-domain correlated double sampling. The main components of the camera - the asynchronous,...
3D scene rendering requires depth maps and color information to produce high quality 3D results. Unfortunately, depth maps captured with the Time-of-flight (TOF) cameras have limited resolution and poor image quality, being severely influenced by the random and systematic noise, which makes them inapposite for generating high quality 3D images. In this paper, we have further analyzed a framework for...
Iris recognition is widely regarded as one of the most unique methods for subject identification. The practical application of iris recognition is primarily limited by constraints imposed on subjects to enable the collection of images of sufficient quality for recognition. This paper introduces the Iris-at-a-Distance (IAAD) system. The IAAD system is a prototype that illustrates the feasibility of...
In remote communication via the Internet, the existence of participant by video streaming of real scene is important. In addition, we consider that non-verbal communication plays an important role in remote communication. In order to realize realistic communication between remote places, the display of video image in remote site with the large-scale screen is effective. However, the video image by...
Modern video endoscopy systems give physicians the ability to inspect internal structures of the human body by using a camera with attached endoscope optics. Video endoscopy has become routine in clinics all over the world. Moreover, video endoscopy systems recently performed a technological change from PAL/NTS C image resolution to HDTV. There is a vast amount of literature on in-vivo and in-vitro...
This paper describes a three-dimensional (3D) imaging sensor system that uses an ultrasonic array sensor and a camera. Ultrasonic array sensors can be used to measure the 3D positions of an object. However, they do not have high resolutions. To overcome this limitation, the proposed system uses the camera to measure the shape of an object and combines this information with 3D position data obtained...
We present an approach to global image registration that allows a robust and efficient image alignment, required in various mobile imaging applications (e.g. multi-frame image enhancement, high dynamic range imaging, panoramic image stitching). The proposed method follows a coarse to fine strategy, adopting different registration techniques at coarse and fine resolution levels. Coarse levels are registered...
In this paper we present a method for geometrically, photometrically & colorimetrically calibrating a multi-projector system for display on a cylindrical surface. Using a single camera we reconstruct the 3D surface of the display and determine the projector-screen relationship to accurately register projected images. Given these relationships, we apply chrominance gamut morphing in the overlap...
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