How to read outer boundary pixel color value?

please help me to read the pixel color value of outer boundary of an image. I mean, I want know the color of the outer boundary pixel. Below image is an scan image.

Answer 1

[Image Analyst]

Which pixel is the boundary? Do you mean the gray pixels? All of them or just any of them, say the one at row 1, column 1? Or do you mean the white border" of the snapshot? Or the white, torn, exposed paper? Why don' tyou repost with an arrow pointing to the pixel you want. Anyway, did you try impixel()?

[Ibrahim Thorig]

Dear; the boundary color of image fragment.

[Image Analyst]

How about this

pixelColor = impixel(1,1);