Re: Image perspective with PIL
PyProg PyProg <[email protected]>
| Newsgroups | gmane.comp.python.image |
|---|---|
| Message-ID | <[email protected]> |
2010/5/3 Fredrik Lundh <[email protected]>: > I've added the documentation from the original patch to this page: > > http://effbot.org/tag/pil.Image.Image.transform > > The next text is attached below. > > </F> > > im.transform(size, PERSPECTIVE, data) > > im.transform(size, PERSPECTIVE, data, filter) > > Applies a perspective transform to the image, and places the result > in a new image with the given size. > > Data is a 8-tuple (a, b, c, d, e, f, g, h) which contains the > coefficients for a perspective transform. For each pixel (x, y) > in the output image, the new value is taken from a position > (a x + b y + c)/(g x + h y + 1), (d x + e y + f)/(g x + h y + 1) > in the input image, rounded to nearest pixel. > > This function can be used to change the 2D perspective of the > original image. Hello The problem is that I do not understand what that means: "which Contains the coefficients for a perspective transform ... "... and in particular what exactly match a, b, c, d, e, f, g and h. If you are patient (excuse me), can you explain with precision (and a didactic, for someone who has trouble like me) what these data (and possibly with an example of processing with good values for a, b, c, d, e, f , g and h). Thank you in advance. a+ -- http://ekd.tuxfamily.org http://ekdm.wordpress.com http://lprod.org/wiki/doku.php/video:encodage:avchd_converter _______________________________________________ Image-SIG maillist - [email protected] http://mail.python.org/mailman/listinfo/image-sig