I want to crop the image using jquery,codigniter

in jquery i get four coordinate of image x1=249 x2=326 y1=194 y2=271 w=77 h=77

in codiegniter done the query

function do_crop() {

                       $x=249; 
            $y=194; 
            $w=77; 
            $h=77; 
            $path= 'system/application/';   
            $config = array(
           'image_library' => 'gd2',
           'source_image' => $path.'/jag1/flowers.jpg' , 
            'new_image' => $path.'/jag2/flowers.jpg',
           'maintain_ration' => false, 
           'width' => $w,
           'height' => $h,
             'x_axis' => $x,
           'y_axis' => $y
          );

          $this->load->library('image_lib');
          $this->image_lib->initialize($config);
          if ( ! $this->image_lib->crop())
          {
              echo $this->image_lib->display_errors();
          }       
            $this->image_lib->clear();
}

i get cropped image. But problem is don't get exact cropped image x,y coordinate problem