Crop image into polygon shape
Posted: Fri Oct 09, 2009 8:28 am
Hi Everyone (this is my first post),
I am trying to figure a way of cropping a polygon out of an image. I have been reading other similar code. It seems that most code is based around the following process:
-Resize the image to fit the width and height of the polygon shape,
Create a blank image of an unusual colour the same size,
Overlay transparent pixels in the shape of the polygon,
Overlay that on to the resized image
set the unusual colour to be transparent...
like http://www.google.co.uk/url?sa=t&source ... WWl8jo3J7g
My problem is I do not want the code to be reliant on the unusual colour not being in the original image. Does anyone have a better method or some code which I can use to check if the unusual colour is in the image.
Thanks in Advance.
I am trying to figure a way of cropping a polygon out of an image. I have been reading other similar code. It seems that most code is based around the following process:
-Resize the image to fit the width and height of the polygon shape,
Create a blank image of an unusual colour the same size,
Overlay transparent pixels in the shape of the polygon,
Overlay that on to the resized image
set the unusual colour to be transparent...
like http://www.google.co.uk/url?sa=t&source ... WWl8jo3J7g
My problem is I do not want the code to be reliant on the unusual colour not being in the original image. Does anyone have a better method or some code which I can use to check if the unusual colour is in the image.
Thanks in Advance.