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.

Introdução ao Processamento Digital de Imagens.

Abstract: The goal of this tutorial is to provide an introductory view of the Digital Image Processing (IP) area that can be used as a study guide for beginners or as basic reference for more advanced studies. The tutorial is divided into two parts: the main part is about the IP fundamentals and a complementary part discusses some application examples. The main part presents the image formation process, including a succinct description of the human eye structure and its relation to a digital camera, as well as comments about a typical IP system. The core of the tutorial is about image operations, such as color operations, spatial filtering, segmentation, scale and resolution transforms, among others. The applications part contains a number of examples, involving image segmentation, handwritten word recognition and content-based image retrieval.

Novel technique for measurement of centration errors of complex, completely mounted multi--element objective lenses

Abstract: The size and the focal length of camera objectives (e.g. cell phones or digital cameras) are becoming smaller and smaller. At the same time the quality requirements are increasing. Besides surface accuracy, the imaging quality of the complete optics is mainly influenced by the alignment errors of the single elements. TRIOPTICS has developed a new technology called MultiLens in order to measure the centering errors of all single surfaces within an objective lens with up to 40 surfaces or more. We achieve accuracies in the range of an arc second. During the measurement the deviation of each center or curvature with respect to a reference axis is measured. These data are further processed in order to provide the shift and tilt of an individual lens or group of lenses in respect to a given reference axis (Patent pending Ref. 1). Applications mainly include the measurement of cell phone and digital camera lenses. However, any type of objective lens from endoscope up to very complex objective lenses used in microlithography can be measured with highest accuracy. The method has been extended to measure also the aspherical axis of lenses.

Cross-talk explained

Abstract: The image sensor measurements are subject to degradation caused by the photon and electron leakage. The color image data acquired via a spatial subsampling procedure implemented as a color filter array is especially vulnerable to the ambiguation between neighboring pixels that measure different portions of the visible spectrum. This so-called "cross-talk" phenomenon is expected to become more severe as the electronics industry's trend to shrink the device footprint continues because the pixel sensors are more densely packed together. We show that an analysis of the mechanism underlying the cross-talk problem is surprisingly straightforward. Our comprehensive analysis admits a simple and effective color correction scheme for a given choice of color filter array in a digital camera.

Digital double sampling method, a related cmos image sensor, and a digital camera comprising the cmos image sensor

Abstract: A digital double sampling method, a related complementary metal oxide semiconductor (CMOS) image sensor, and a digital camera comprising the CMOS image sensor are disclosed. The method includes generating first digital data corresponding to an initial voltage level apparent in a pixel in response to a reset signal, inverting the first digital data, outputting a detection voltage corresponding to image data received from outside of the CMOS image sensor, and counting in synchronization with a clock signal, starting from an initial value equal to the inverted first digital data, and for an amount of time responsive to a voltage level of the detection voltage.

Digital docking system user interface method and apparatus

Abstract: A digital camera docking system user interface provides, on the display of the digital camera, information regarding the operation of the digital camera docking system. The user interface may guide the user in the initiation of interactions between the digital camera and external devices such as television monitors, personal computers, and printers and may also provide feedback regarding the progress of these interactions.