[Image-SIG] Fwd: Inverse of QUAD transform?

[Boris Borcic]

Well, obviously it should be possible to pick some minimal target rectangle 
containing the target quad, and then the problem reduces to that of finding a 
source quad around the source rectangle in such a way that mapping it to the 
target rectangle will also map the source rectangle to the target quad :)

Laura & Edward Cannon wrote:
> ---------- Forwarded message ----------
> From: Laura&  Edward Cannon<cannon.el at gmail.com>
>
> [...] There is not an anti-quad however.
>
> On Fri, Nov 27, 2009 at 9:50 AM, Mark Wendell<mark.wendell at gmail.com>  wrote:
>> The docs say that the QUAD image transform takes a quadrilateral
>> defined by an 8-tuple, and transforms it to a rectangle of the
>> provided 'size'.
>>
>> I need the inverse of that: I need to take a rectangular region, and
>> warp it to an arbitrary quad. Is there a way to do that?
>>
>> thanks
>> Mark
>> --
>> --
>> Mark Wendell
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