How to display color intensity contour of gray scale image

Last year I used image aquisition and processing toolboxs to display the contour profile of a laser beam. Now I can only capture the color image. I forgot how to perform steps 2 and 3 (which app in image processing toolbox?) : 1) Capture imaage with Image Aquisition Toolbox, 2) convert to gray image, and 3) display contour?

Can I get some suggestions on how to get pictures 2) and 3) starting from the first picture 1)?

Seems stupid, but I am clicking on all the image processing toolbox apps and just not finding my way through the steps as I did a year ago!

Step 1) Capture Image

Step 2) Convert to gray (using image processing toolbox?)

Answer 1

[Walter Roberson]

Converting to gray is rgb2gray

Displaying the image in the indicated way would probably be surf followed by a colormap call.