Hi PCarr ,
Not sure exactly what you're after, but you can get the pixel data (exported as a matrix) by checking the 'Matrices used to generate images' option in the Image Export tab.
However, I wonder if creating profiles across your crystals might work? Here is the part of the Imaging webinar that introduces them: https://youtu.be/ZCRCEGtSl0k?t=5037
You can adjust the size of the regions that go into the profile, so that you could make them 1 pixel in size (if you wanted). Would that solve your problem (as well as providing automatic plotting and providing a value for each pixel along your profile)?
-Bence