in reply to Re: Interpolating data using pdl
in thread Interpolating data using pdl

Actually we have data only at few points. There is no invalid data.

What i'm trying to do is something like resizing a image. Suppose i have a 100x100 image and i want to resize it to 1000x1000.

To be precise, I have a world map, and a dataset for every 1.25 interval along both latitude and longitudes. Now I want to be able to interpolate the existing data, so that i can calculate the data at any point on the map.

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Re^3: Interpolating data using pdl
by thanos1983 (Parson) on Mar 15, 2017 at 11:46 UTC

    Hello Again,

    Based on What i'm trying to do is something like resizing a image. Suppose i have a 100x100 image and i want to resize it to 1000x1000. you could use Image::Resize. Sample of code from documentation:

    use Image::Resize;
$image = Image::Resize->new('large.jpg');
$gd = $image->resize(250, 250);

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    But also Image::Imlib2. Sample of code from Stretch, resize, or thumbnail an image using Perl:

    use Image::Imlib2;

# load image from file
my $image = Image::Imlib2->load("in.png");

# get some info if you want
my $width  = $image->width;
my $height = $image->height;

# scale the image down to $x and $y
# you can set $x or $y to zero and it will maintain aspect ratio
my $image2 = $image->create_scaled_image($x,$y);

# save thumbnail to file
$image2->save("out.png");

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