Sunday, April 28, 2013

Surf Detector

OpenCV Sobel edge detector


Sobel X Gradient

Sobel Y Gradient

Sobel Gradient

OpenCV Tutorial 1: Mat - The basic Image Container

Color Space In OpenCV
There are, however, many other color systems each with their own advantages:
  • RGB is the most common as our eyes use something similar, our display systems also compose colors using these.
  • The HSV and HLS decompose colors into their hue, saturation and value/luminance components, which is a more natural way for us to describe colors. You might, for example, dismiss the last component, making your algorithm less sensible to the light conditions of the input image.
  • YCrCb is used by the popular JPEG image format.
  • CIE L*a*b* is a perceptually uniform color space, which comes handy if you need to measure the distance of a given color to another color.
Sample Code

Tuesday, April 16, 2013

Camera Calibration tool box from Caltech
This is a release of a Camera Calibration Toolbox for Matlab® with a complete documentation. This document may also be used as a tutorial on camera calibration since it includes general information about calibration, references and related links. 

Monday, April 1, 2013

Latex array stretch

Stretch the row size of a table
\renewcommand\arraystretch{MyValue}% (MyValue=1.0 is for standard spacing)