ImageTake

ImageTake[image, n]
gives an image consisting of the first n rows of image.

ImageTake[image,-n]
gives an image consisting of the last n rows of image.

ImageTake[image, {row₁, row₂}]
gives rows row₁ through row₂.

ImageTake[image, {row₁, row₂}, {col₁, col₂}]
gives the image that spans row₁ to row₂ and col₁ to col₂.

ImageTake takes the rows of an image to be numbered from top to bottom, starting at 1.

	All	all elements
	n	elements 1 through n
	-n	last n elements
	{n}	element n only
	{m,n}	elements m through n inclusive
	{m,n,s}	elements m through n in steps of s

If fewer elements exist than are requested, ImageTake will just return the elements that are present.

Take the first 70 pixel rows from an image:

Take rows 80 to 200 and columns 100 to 200: