A practical real-time auto-focus algorithm for digital camera ispresented. and it improves the reliability and speed of auto-focus process, especially suitable for mega-pixel high definition camera. The proposed algorithm adopts threshold gradient and edge point count technique besides focus value function, instead of traditional two-stage climbing search algorithm that uses focus value functio...

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We use a novel image-based technique to measure the directional reflectance of living human skin. Using only a commercial-grade digital camera and electronic flash, we can collect many samples in a few minutes. By exploiting the body’s own curvature, we obtain data comprehensively covering a wide range of directions. We present results from several different individuals, showing interesting eff...

In this context this paper proposes a conceptual framework for a mapping process in an attempt to survey city blocks where the only sensory input is a single low-cost digital camera. This proof-of-concept measuring process begins with taking images of at least two known geo-referenced control points and involves taking sequential images as the user walks forward around a city block. Each image ...

Today, in more and more enterprises digital services are offered to employees. An inherent characteristic of digital service is the self-service concept. Based on findings from a case study and academic literature, it is argued for the importance of employee knowledge when designing digital services. It is revealed that existing service blueprinting approach are not capable of adequately reflec...

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Scientists use digital camera data as the input to their analysis of image processing algorithms. In this paper we measured the "engineered color errors" introduced by digital camera color processing. Camera manufactures build their color management systems using the sRGB design standard. Although that sRGB is a guideline in the beginning, the final firmware shows certain liberties taken to mak...

We utilize traces of demosaicing operation in digital cameras to identify the source camera-model of a digital image. To identify demosaicing artifacts associated with different camera-models, we employ two methods and define a set of image characteristics which are used as features in designing classifiers that distinguish between digital cameramodels. The first method tries to estimate demosa...

We propose a spectral imaging method that allows a regular digital camera to be converted into a snapshot spectral imager by equipping the camera with a dispersive diffuser and with a compressed sensing-based algorithm for digital processing. Results of optical experiments are reported.