Surf Detector

OpenCV Sobel edge detector

http://docs.opencv.org/doc/tutorials/imgproc/imgtrans/sobel_derivatives/sobel_derivatives.html

Orignal

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

Camera Calibration tool box from Caltech

http://www.vision.caltech.edu/bouguetj/calib_doc/
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. 

Read Camera Write Video

overloading constructors

Output:

rect area: 0 rectb area: 30 rectc area: 12

Push structure into vector in C++

Push structure into vector in C++

Latex array stretch

Stretch the row size of a table

\renewcommand\arraystretch{MyValue}% (MyValue=1.0 is for standard spacing)