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.

The Ultracam Large Format Aerial Digital Camera System

Abstract: The race is on to introduce an aerial digital camera system to outperform the current aerial film cameras in quality, accuracy and economics. We introduce the UltraCam-D large format digital aerial camera. It achieves superiority over conventional aerial film imaging. The system produces aerial "photography" as if a film camera had taken film images that then were scanned. As a result, images that get produced by the novel camera will feed into a current softcopy photogrammetry workflow without significant changes, yet with many advantages. These include quality advantages with superior radiometry and geometric stability resulting from the use of CCD technology. There are cost advantages due to the avoidance of film and scanning. Finally there are operational advantages due to instant quality control, image based navigational support reducing the need for imaging skills, and very short repeat intervals in the range of 0.75 seconds, optionally producing very high forward overlaps at no added cost. The technical specifications of the camera meet the requirement that it outperform a modern film camera system.

Methods and systems for controlling electronic devices according to signals from digital camera and sensor modules

Abstract: An embodiment of a method for remotely controlling an electronic apparatus, performed by a processor of the electronic apparatus, comprises the following steps. Existence of an object in close proximity to the electronic apparatus is detected. A camera module of the electronic apparatus is turned on to capture a series of images. A control operation in response to the captured images is determined. The control operation is performed to an electronic device of the electronic apparatus.

Digital camera including an on-line sales mode

Abstract: A digital camera comprises an image sensor for capturing a plurality of images; a processor for processing the plurality of images and producing a corresponding plurality of digital image files; a memory for storing the plurality of digital image files; and a mode control for selecting between a normal mode and an on-line sales mode.

Evaluation of High Dynamic Range Photography as a Luminance Mapping Technique

Abstract: The potential, limitations, and applicability of the High Dynamic Range (HDR) photography technique is evaluated as a luminance mapping tool. Multiple exposure photographs of static scenes are taken with a Nikon 5400 digital camera to capture the wide luminance variation within the scenes. The camera response function is computationally derived using the Photosphere software, and is used to fuse the multiple photographs into HDR images. The vignetting effect and point spread function of the camera and lens system is determined. Laboratory and field studies have shown that the pixel values in the HDR photographs can correspond to the physical quantity of luminance with reasonable precision and repeatability.

Recovering spectral data from natural scenes with an RGB digital camera and colored filters

Abstract: Many spectral-recovery methods using RGB digital cameras assume the underlying smoothness of illuminant and reflectance spectra, and apply low-dimensional linear models. The aim of the present work was to test whether a direct-mapping method could be used instead of a linear-models approach to recover spectral radiances and reflectances from natural scenes with an RGB digital camera and colored filters. In computer simulations, a conventional RGB digital camera with up to three colored filters was used to image scenes drawn from a hyperspectral image database. Three measures were used to evaluate recovery with the direct-mapping method: goodness-of-fit, root-mean-square error, and a color-difference metric. It was found that with two and three filters both spectral radiances and reflectances could be recovered sufficiently accurately for many practical applications. With little increase in computational complexity, an RGB camera and a few colored filters can provide significantly better recovery of natural scenes than an RGB camera alone. (c) 2007 Wiley Periodicals, Inc.