Horrible results from image resize

[Tom.]

I'm getting really bad image results when using API resizing. I'm using Imagick, at no softening and 100% quality. 

Above is the original

 

This is the resized. 

 

The colours seem off and the image appears to be over sharpened causing a halo effect. In which sharpening is set to none? 

Anyone else experienced this? 

[dotnetic]

I have this option in my site/config.php file:

$config->imageSizerOptions = array_merge(
  $config->imageSizerOptions,   // all items from wire/config
  array(                        // overwrite specific items
    'defaultGamma' => -1,
  )
);

I think the cause was something similar to what you experience with the colors, but I am not sure. Maybe try this setting.

[Tom.]

@jens.martsch Thank you, 

It seems to be not only the colour but even at 100% you get a lot of artefacts on the image. Another example:

Original above

Output through the API at 100%.

 

EDIT:

Just realised that the forum is compressing images so they look the exact same ??? I'll try get them up on Dropbox

[wbmnfktr]

It could be my eyes but... ? in your second example I can't spot any difference.