problem with enlarge an image using Scale/Sample

[ycul]

I was trying to Converts and saves TIFF files with Group 4 compression , max width of 5800 px, max height of 5800 px and a distort aspect of 1.

Here is a list of commands I used:
my $res = $image->Set(compression=>'Group4');
my $res = $image->Scale(width=>5800, height=>5800);
my $res = $image->Write($outfile);

I tested it with an image of 4.3M and a Width of 2588 and length of 1731.
The output is ridiculous: a 22M image with a width of 5800 and length of 3879.

Anybody can tell me where i am wrong? Thanks for the help.

[magick]

Use

• $image->Sample();

[ycul]

Same result.

Use

• $image->Sample();

[magick]

Ok, add

• $image->Quantize( colors=>2, colorspace=>'gray' );

right after you scale the image.

[ycul]

Added Quantize() after scale, still doesn't work.

Is there a problem with an image being smaller than what sample/scale
sets it to?

Problem exists only when the image size has to be increased.