Topic
Digital camera
About: Digital camera is a research topic. Over the lifetime, 12169 publications have been published within this topic receiving 137431 citations. The topic is also known as: digicam & digital still camera.
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Journal Article•
TL;DR: Experimental results show that RAF considerably improves the estimation accuracy of both shape and appearance parameters when fitting to low resolution data, and is compared against a state-of-the-art tracker.
Abstract: Active Appearance Models (AAM) are compact representations of the shape and appearance of objects. Fitting AAMs to images is a difficult, non-linear optimization task. Traditional approaches minimize the L2 norm error between the model instance and the input image warped onto the model coordinate frame. While this works well for high resolution data, the fitting accuracy degrades quickly at lower resolutions. In this paper, we show that a careful design of the fitting criterion can overcome many of the low resolution challenges. In our resolution-aware formulation (RAF), we explicitly account for the finite size sensing elements of digital cameras, and simultaneously model the processes of object appearance variation, geometric deformation, and image formation. As such, our Gauss-Newton gradient descent algorithm not only synthesizes model instances as a function of estimated parameters, but also simulates the formation of low resolution images in a digital camera. We compare the RAF algorithm against a state-of-the-art tracker across a variety of resolution and model complexity levels. Experimental results show that RAF considerably improves the estimation accuracy of both shape and appearance parameters when fitting to low resolution data.
38 citations
Patent•
04 Dec 2000
TL;DR: In this paper, the camera is coupled to a processor having a first program for digitizing the stereo pair of images and a second program for transforming the digitized stereo pair into a predefined format.
Abstract: A stereoscopic photography system utilizes digital camera technology to create stereoscopic content. The camera has a photosensitive material optically aligned with a lens for capturing images, a viewfinder screen for viewing the images captured on the photosensitive material, and a zoom control for adjusting the focal length of the lens. An optical attachment is securely coupled to the camera lens in a manner that permits adjustment. The optical attachment causes a stereo pair of images to be focused through the lens onto the photosensitive material The camera is coupled to a processor having a first program for digitizing the stereo pair of images and a second program for transforming the digitized stereo pair of images into a predefined format. The transformed images are displayed on a monitor and observed through either a modulating overlay screen or modulating eyewear.
38 citations
Patent•
16 Oct 1996
TL;DR: In this paper, a method and system for automatically adding sound to images in a digital camera, which includes a view finder for displaying a plurality of image cells corresponding to previously captured images, is presented.
Abstract: A method and system for automatically adding sound to images in a digital camera, which includes a view finder for displaying a plurality of image cells corresponding to previously captured images. The method and system includes the ability to manually post-annotate a previously captured image. This is accomplished by placing the digital camera in a review mode, selecting the image cell in the view finder corresponding to the previously captured image, recording a sound clip; and then attaching the sound clip to the previously captured image.
38 citations
Patent•
15 Jan 2003
TL;DR: A portable print reading device includes a high resolution digital camera to which the following additional functions have been added: image centering by tactile or sound information, obtained from the analysis or real-time video signals provided by the camera sensor, optical recognition of the characters contained in an image, conversion of recognized text into synthetic speech, converting of recognizing text into Braille, positioning of the reading cursor anywhere inside documents recognized and temporarily stored in the reading device memory as discussed by the authors.
Abstract: A portable print reading device includes a high resolution digital camera to which the following additional functions have been added: image centering by tactile or sound information, obtained from the analysis or real time video signals provided by the camera sensor, optical recognition of the characters contained in an image, conversion of recognized text into synthetic speech, conversion of recognized text into Braille, positioning of the reading cursor anywhere inside documents recognized and temporarily stored in the reading device memory: beginning of a page, a paragraph, a line, word search, etc., processing of raw images provided by the camera to allow the transfer of whole images or selected image parts to a tactile graphic array, to allow blind users to apprehend graphic elements of such an image, and control of the camera functions by electrical signals provided by the recognition of commands spoken by the user.
38 citations
Patent•
28 Jul 2009
TL;DR: In this article, the main subject matter of the present invention is a digital camera (1) provided with several lenses (2, 4) such that several images are captured simultaneously, more particularly two images: a main image (8) of the scene in front of the digital camera and an additional image (9) of a person operating the camera.
Abstract: The main subject matter of the present invention is a digital camera (1) provided with several lenses (2, 4) such that several images are captured simultaneously, more particularly two images: a main image (8) of the scene in front of the digital camera (1) and an additional image (9) of the person operating the digital camera (1). The invention comprises both digital photographs and digital videos.
38 citations