How can I get intensity data for each pixel in an image?

[dim]

I am acquiring RGB images with a 1408 board. I need to analyze images pixel by pixel. How can I get the intensity of every pixel?

[Kyle_V]

I would first use the IMAQ ExtractSingleColorPlane.vi to extract the Intensity of the RGB image; then use the IMAQ Historgram.vi or IMAQ Histograph.vi to display the intensities of every pixel. You could also use the IMAQ ImageToArray.vi to convert the intensity values of the RGB image into a 2-D array of 8-bit intensities.

Finally, if you're only interested in an image's intensity values but your camera outputs NTSC or PAL color images, you can set the frame grabber to acquire RS-170 or CCIR images. These setting will ignore the color information and the frame grabber will only acquire the intensity vaules.

I hope this helps.

Kyle V
Applications Engineer
National Instruments
www.ni.com/ask