Change sharpening settings in Wordpress

What I'm wanting to do is refine the setting for Wordpress images when they are uploaded using the media panel in Wordpress. It seems that when you upload they are somewhat blurry due to the resizing. This is possibly due to compression, but I'm looking at applying sharpening methods.

Wordpress doesn't appear to be applying any sharpening to images, but how can I go about sharpening the images in Wordpress on upload?

Sharpening the images prior to upload is not possibly—looking for a streamlined process by开发者_开发知识库 integrating a function.

The file you are searching is in wp-include/media.php

for compression it's on line 406 (already set at jpeg_qualiy = 90)

So it's pretty high by default. Do you have another direction to check for your compression issue? I personally never had any issues with the compression. Note that if your initila jpeg is already highly compressed then it will double compress your file.

source: wp ver. 3.1.2