Kenneth Dawson-Howe's A practical introduction to computer vision with OpenCV2 PDF

By Kenneth Dawson-Howe

ISBN-10: 1118848454

ISBN-13: 9781118848456

Explains the idea in the back of uncomplicated computing device imaginative and prescient and offers a bridge from the speculation to functional implementation utilizing the general OpenCV libraries

Computer imaginative and prescient is a quickly increasing zone and it's changing into steadily more uncomplicated for builders to use this box as a result of the prepared availability of top quality libraries (such as OpenCV 2).  this article is meant to facilitate the sensible use of machine imaginative and prescient with the target being to bridge the distance among the idea and the sensible implementation of desktop imaginative and prescient. The publication will clarify the best way to use the appropriate OpenCV library workouts and may be followed via an entire operating software together with the code snippets from the textual content. This textbook is a seriously illustrated, sensible creation to a thrilling box, the functions of that are changing into nearly ubiquitous.  we're now surrounded via cameras, for instance cameras on pcs & capsules/  cameras equipped into our cell phones/  cameras in video games consoles; cameras imaging tricky modalities (such as ultrasound, X-ray, MRI) in hospitals, and surveillance cameras. This publication is worried with supporting the following iteration of laptop builders to use these kinds of photographs so as to boost platforms that are extra intuitive and engage with us in additional clever ways. 

  • Explains the speculation at the back of easy laptop imaginative and prescient and gives a bridge from the speculation to functional implementation utilizing the usual OpenCV libraries
  • Offers an creation to laptop imaginative and prescient, with sufficient conception to clarify how many of the algorithms paintings yet with an emphasis on useful programming issues
  • Provides sufficient fabric for a one semester path in machine imaginative and prescient at senior undergraduate and Masters levels 
  • Includes the fundamentals of cameras and pictures and photograph processing to take away noise, earlier than relocating directly to issues comparable to photograph histogramming; binary imaging; video processing to observe and version relocating items; geometric operations & digital camera versions; side detection; positive aspects detection; popularity in images
  • Contains a great number of imaginative and prescient software difficulties to supply scholars with the chance to resolve actual difficulties. pictures or video clips for those difficulties are supplied within the assets linked to this publication which come with an stronger eBook

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Extra resources for A practical introduction to computer vision with OpenCV2

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8 Back-projection (right image) of a (3D) HLS histogram of the skin pixels (centre image) of a colour image (left image). e. 8, in which a sample set of skin pixels is histogrammed and back-projected into an image in order to identify skin regions in the image. Note that the size of the histogram bins is particularly important when doing this back-projection, particularly if the number of samples is limited. In this case it was found that 8 × 8 × 8 bins in the histogram was appropriate. In addition, the choice of colour space can be quite important.

4. CIE L∗ u∗ v∗ is another standard colour space defined by CIE which is intended to be provide a perceptually uniform colour space where the differences between colours are proportional to our perceived differences. L∗ is a measure of luminance and u∗ and v∗ are chromaticity values. 5. CIE L∗ a∗ b∗ is a device independent colour space that includes all colours that can be perceived by humans. 6. e. that have not been interpolated). 7. 6 Some Colour Applications In some applications we need to identify which pixels represent a particular colour.

G. 19 the first set is just all possible 3x3 regions including the current point and the second set is an alteration of this which is more shaped/targeted). e. we determine a local average of the points that correspond to those in the mask). The main question is which mask to choose for any given point. e. surface or object). We cannot tell the physical origin of pixels, but we can approximate it to some extent by looking for the local region which is most consistent (self-similar). We do this by calculating the dispersion (the degree to which the pixels are on average different from the average value) for each mask and choose the one with the minimum dispersion.

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A practical introduction to computer vision with OpenCV2 by Kenneth Dawson-Howe


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