OpenCV Examples Part 1

Nov 4, 2008 | Tags: OpenCV | del.icio.us del.icio.us | digg Digg

5. Convert RGB to Grayscale

Listing 4 below loads an RGB image and convert it to grayscale.

Listing 4: Convert RGB to grayscale

  1. /* load image */
  2. IplImage *src = cvLoadImage( argv[1], CV_LOAD_IMAGE_COLOR );
  3.  
  4. /* get image properties */
  5. width  = src->width;
  6. height = src->height;
  7.  
  8. /* create new image for the grayscale version */
  9. IplImage *dst = cvCreateImage( cvSize( width, height ), IPL_DEPTH_8U, 1 );
  10.  
  11. /* CV_RGB2GRAY: convert RGB image to grayscale */
  12. cvCvtColor( src, dst, CV_RGB2GRAY );

To convert image color space, simply use cvCvtColor. This function supports several color spaces. Consult OpenCV Reference Manuals for the details.

4. Copy an Image 6. Access Image Data

In this page

  1. Introduction
  2. Load an Image
  3. Retrieve Image Properties
  4. Copy an Image
  5. Convert RGB to Grayscale
  6. Access Image Data
  7. Conclusion
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