Reply to thread

I scanned a photo from a book (the photo stretched over an entire page, about A4 in size), and I want to print it as a poster about 5 X 3 ft in size.

When I zoom in into the scanned photo, to see how it will look like enlarged, I see rather ugly marks, arranged in a pattern.  See the attached photo.  A friend told me that these marks result from the mesh used in the printing process of the book.

Is there a photoshop function that eliminates these marks?  I know nothing about graphics or photoshop, but I guess there must be a function that replaces the value at each pixel with the average values of all pixels in a neighborhood around it, and thus smoothes the image and solves my problem.

Will appreciate any help!

[ATTACH]60314[/ATTACH]