image resize library issues

[eluser]bennyhill[/eluser]
I am using the image resize upon upload library. After the picture is resized, the quality is really bad. It's pixelated and sometimes the colors are off.
Here is my config array:

Code:

$config['upload_path'] = './productImages/';
        $config['allowed_types'] = 'gif|jpg|png';
        $config['max_size'] = '200';
        $config['remove_spaces'] = true;
        $config['overwrite'] = false;

And then I have a resize function which is called from the upload function:

Code:

function resizeImage($image)
  {
    $config['image_library'] = 'gd2';
    $config['source_image'] = "./productImages/".$image;
    $config['width'] = 100;
    $config['height'] = 100;
    $config['master_dim'] = 'width';
    
    $this->load->library('image_lib', $config);
    if(! $this->image_lib->resize()){
        echo $this->image_lib->display_errors();
    }
    
  }

Anything I can add/change/remove here to make the resized images not lose their quality?