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.

Assessment of Photogrammetric Mapping Accuracy Based on Variation Flying Altitude Using Unmanned Aerial Vehicle

Abstract: Photogrammetry is the earliest technique used to collect data for topographic mapping. The recent development in aerial photogrammetry is the used of large format digital aerial camera for producing topographic map. The aerial photograph can be in the form of metric or non-metric imagery. The cost of mapping using aerial photogrammetry is very expensive. In certain application, there is a need to map small area with limited budget. Due to the development of technology, small format aerial photogrammetry technology has been introduced and offers many advantages. Currently, digital map can be extracted from digital aerial imagery of small format camera mounted on light weight platform such as unmanned aerial vehicle (UAV). This study utilizes UAV system for large scale stream mapping. The first objective of this study is to investigate the use of light weight rotary-wing UAV for stream mapping based on different flying height. Aerial photograph were acquired at 60% forward lap and 30% sidelap specifications. Ground control points and check points were established using Total Station technique. The digital camera attached to the UAV was calibrated and the recovered camera calibration parameters were then used in the digital images processing. The second objective is to determine the accuracy of the photogrammetric output. In this study, the photogrammetric output such as stereomodel in three dimensional (3D), contour lines, digital elevation model (DEM) and orthophoto were produced from a small stream of 200m long and 10m width. The research output is evaluated for planimetry and vertical accuracy using root mean square error (RMSE). Based on the finding, sub-meter accuracy is achieved and the RMSE value decreases as the flying height increases. The difference is relatively small. Finally, this study shows that UAV is very useful platform for obtaining aerial photograph and subsequently used for photogrammetric mapping and other applications.

Digital camera with sound recording

Abstract: A digital camera (1) for capturing sound passages as well as still images has the following elements. It has a camera apparatus (21) for capturing still images. It also has a sound recording apparatus (101, 102, 103, 106) for capturing sound passages. A memory (107) is used for retaining still images as still image files and sound passages as sound passage files. The user interface of the camera is adapted for selectively linking one or more still image files with one or more sound passage files to form a linked group, and for selectively unlinking one or more files from a linked group. This equivalent treatment of still images and sound passages allows effective use of the camera for recording ambient sound together with images, and for flexible construction of sound/image composites representing a user's experience in a rich and effective manner.

System and methods for analyzing tooth shades

Abstract: A digital camera (12) connects to a tooth shade analyzer subsystem, e.g., a digital video processor (14), and a color display monitor for the electronic determination of the color of patient's teeth. Preliminarily, the camera captures (26) a series of digital color images of tooth shades corresponding to reference shade guides (34), and electronically compares the reference shades to an image of the patient's tooth. In a preferred embodiment the comparison is done over a set of pseudo-pixels, each corresponding to a group of pixels in an high-resolution camera. Once a match is found, it is communicated to a user of the system (52). In a specific embodiment the camera is equipped with a sleeve and illumination subsystems that help reduce the variations in the color of digital images due to external factors.

System and method for correlating processing data and image data within a digital camera device

Abstract: A system (10) and method for correlating processing data and image data within a digital camera device (14) comprises a capture device (24) for gathering image data, a data cell manager (95) for building a data cell (76) containing processing data and for linking the data cell to the image data, and a processor device (88) for processing and compressing the image data by using the processing data stored within the data cell.

P-126: Ultra-Compact LED based Image Projector for Portable Applications

Abstract: By using a single high power Light Emitting Diode (LED) and a small size transmissive LCD very compact projectors, which can be run from batteries, can be built. Such a projector can be used in combination with or integrated into a PDA or digital camera to project images or presentations in a small size format, and would be used whenever a laptop would be unavailable or clumsy. For these types of applications the required flux can be low. We have build a very small (prototype) projector using a single, high power LED, a small LCD, and a small projection lens. The light output of such a configuration is in the range of 5 to 10 lm, which is sufficient for the projected image sizes as indicated above. In this paper we well describe the system and its performance and size, and elaborate on alternative configurations and performance.