By Dr. Bernd Jähne (auth.)
Written via a non-computer scientist for non-computer scientists this publication isintended as a pragmatic advisor taking the reader from simple innovations to updated examine issues in electronic photo processing. The presentation builds on rules and mathematical instruments typical within the traditional sciences in order that the reader will get a simple entry to the fabric awarded. The publication discusses the next subject matters: picture acquisition and digitization; linear and non-linear filter out operation for the detection of edges, neighborhood orientation and texture; speedy algorithms on pyramidal and multigrid information buildings; morphological operations to realize the form of gadgets; segmentation and category. extra chapters care for thereconstruction of third-dimensional gadgets from projections and the research of stereo photos and picture sequences with differential, correlation, and filter out algorithms. Many examples - a few of them in colour - from a number of parts exhibit how even advanced initiatives may be solved utilizing low-cost picture processing platforms at the foundation of a private computing device.
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Additional info for Digital Image Processing: Concepts, Algorithms, and Scientific Applications
Microscopy do ~ f, d; ~ f The depth of focus is even smaller in microscopy where the objects are significantly enlarged, since it is then given by X ~ 2n,c:d0 3 ~ d; . 2 pm. In conclusion, we can distinguish between two different types of imaging systems: with distant objects, we obtain a sufficient depth of focus to image a 3-D scene with considerable depth variations, without significant losses in sharpness. In microscopy, however, we only can focus a tiny depth zone of an object. Thus we can observe cross sections of an object.
_. ) The parallax is inversely proportional to the distance x3 of the object (zero for an object at infinity) and is directly proportional to the stereoscopic basis and the focal length of the cameras (d; ~ f for distant objects). In my research group, we use stereo imaging to observe the spatial structure of small-scale water surface waves on the ocean surface. The stereo system has a stereoscopic basis of 200mm; the focal length of the lenses is 100mm. 2 Image formation 39 one sensor element of the CCD camera per 1 em height change at a distance of 4 m.
R infrared from the ocean surface. Without any other influences, the observed brightness would directly be related to the ocean's surface temperature. nd other trace gases. t low angles of incidence. nd clouds. • Clouds must be carefully detected and screened since they hinder the view onto the ocean surface. This is not difficult for thick clouds which are not penetrated at all, but it is for thin, partly transparent clouds. 4 2 Image Formation and Digitization Light Sources The simplest model for a light source is the point light source.