Almost all photographers are very familiar with using an 18% reflectance gray card to set the camera’s exposure. Usually these are used by placing the gray card into the scene and pointing the meter or camera at the card and setting the shutter speed and aperture for the exposure. The color balance needed to achieve neutral gray tones in the image is determined by the film manufacturer, set in ...

The Circular Optical Object Locator is a collaborative and cooperative music-making device. It uses an inexpensive digital video camera to observe a rotating platter. Opaque objects placed on the platter are detected by the camera during rotation. The locations of the objects passing under the camera are used to generate music.

In this paper, we consider using traces of demosaicing operation in digital cameras to identify the source digital camera-model of an image. For this purpose, we employ two methods and define a set of image characteristic. The first method detects simple forms of demosaicing based on extracting periodicity features, and the second method tries to estimate the demosaicing parameters assuming a l...

Digital sensors, providing excellent quality with respect to geometry and radiometry, are more and more replacing traditional analogue photogrammetric data acquisition. Allowing for a completely digital data flow, particularly line scanners based on the three-line principle offer new opportunities for higher productivity and for cost reduction, since automated processing of orthoimages and DEM ...

This report summarizes the technical approach using linear and non-linear iterative models in order to predict the spectral reflectance from the digital counts of a trichromatic Digital Camera System associated with absorption filters.

Many luminance measuring tasks require a luminance distribution of the total viewing field. The approach of imageresolving luminance measurement, which could benefit from the continual development of position-resolving radiation detectors, represents a simplification of such measuring tasks. Luminance measure cameras already exist which are specially manufactured for measuring tasks with very h...

The paper describes a new method for indexing and retrieval of photographic images: we propose to involve the distance information of objects for indexing. We applied the “range-from focus” technique for distance estimation combined by statistical segmentation. This technique doesn’t require stereo and it is easy to be implemented in conventional digital cameras. Test results illustrate relativ...

This article highlights the discourses of children and leisure-time pedagogues regarding ways the activity at two different Swedish school-age educare centres are mutually constructed. Two different topics are stressed: children’s perspectives and school-age educare centres as a social and educational practice. Data was constructed through walkand-talk conversations supported by photos from a d...

Segregation is a popular phenomenon. It has considerable effects on material performance. To the author’s knowledge, there is still no automated objective Quantitative indicator for segregation. In order to full fill this task, segregation of particles is analyzed. Edges of the particles are extracted from the digital picture. Then, the whole picture of particles is splintered to small rectangl...

This paper proposes a method for recognizing degraded characters in bookshelf images captured by a digital camera. We adopt displacement matching and templates that include neighboring characters or parts thereof to cope with the degradation. The templates are referred as context-based image templates, since they offer more contextual information than single-letter templates. Such templates are...