For integer offsets, I think you can just change the current data window
offset, and then just re-crop to the original window? I think from Python it
would look like:
b = ImageBuf("blah.exr")
orig_roi = b.roi()
b.specmod().x += xoffset
b.specmod().y += yoffset
# N.B. the x,y origin is one of the few things that's safe to change
# in an existing ImageBuf's spec. Don't try that with width or height!!
c = ImageBuf()
ImageBufAlgo.crop (c, b, orig_roi)
# now c is your offset image
For sub-pixel transforms, you'd need to use warp, right:
b = ImageBuf("blah.exr")
c = ImageBuf()
ImageBufAlgo.warp (c, b, (1, 0, xoffset, 0, 1, yoffset, 0, 0, 1))
The warp will be done with proper filtering, and will be more expensive, than
the integer offset shift.
I haven't tried either of these, so take with a grain of salt and double check
that I haven't inserted any typos or used the wrong function names or something.
> On Feb 12, 2016, at 10:04 AM, Jep Hill <[email protected]> wrote:
>
> Hi everyone,
>
> I'm guessing the answer is right in front of me in the docs and I'm just
> missing it but...
>
> Is there a way to do a 2d transform using the OIIO Python API? In this case,
> I'm looking for an integer based reposition to avoid filtering but I'm sure
> I'll need sub-pixel transforms in the future. I saw the warp option but I
> thought there might be a better solution?
>
> Cheers,
> Jep
>
>
--
Larry Gritz
[email protected]
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