I'm too busy with other things right now to implement this, but you can search
this list for an old post from me that contains a fast image interpolation
algorithm.
--Tim
On Wednesday, November 12, 2014 03:57:05 AM Cristóvão Duarte Sousa wrote:
> Hi,
>
> I would like to get the interpolated value at a non-integer point of an
> image.
> Using Images.jl and Grid.jl I've tried doing
>
> using Images, TestImages, Grid
> img = convert(Image{Gray},testimage("mandrill")) # for example
>
> img_bi = CoordInterpGrid((1:size(img,1), 1:size(img,2)), img.data, BCnearest
> , InterpLinear)
> img_bi[12.34, 56.78]
>
> which doesn't work due to img.data being
> an Array{Gray{UfixedBase{Uint8,8}},2} .
>
> On the other hand, this
>
> img_bi = CoordInterpGrid((1:size(img,1), 1:size(img,2)), convert(Matrix{
> Float64}, img.data), BCnearest, InterpLinear)
>
> works.
> However I'd like to avoid the conversion.
>
> Is there a nice way to do it, or must I implement the bilinear
> interpolation myself?
>
> Thanks,
> Cristóvão
