Loader changes the pixel value after loading as bitmap

hi all,

my aim load 2 images , compare color information pixel pixel. purpose used "flash.display.loader" class load images, , once load completes i'll typecast loaded content bitmap object (loaderobj.content bitmap). i'll bitmapdata bitmap of both images , compare pixels.

 

now problem color information of original image , loaded bitmap different. example color value of pixels of attached image image1.jpg 0xdddddd complete 1366x768. , same image when loaded bitmap color value of pixels different original value (for pixels only, not pixels different).

 

i’ve given source code , sample images.

 

please can me out how resolve issue?

 

 

<?xml version="1.0" encoding="utf-8"?>

<s:windowedapplication xmlns:fx="http://ns.adobe.com/mxml/2009"

                                                     xmlns:s="library://ns.adobe.com/flex/spark"

                                                     xmlns:mx="library://ns.adobe.com/flex/mx"

                                                     width="1376" height="800"

                                                     showstatusbar="false">

          <fx:declarations>

                    <!-- place non-visual elements (e.g., services, value objects) here -->

          </fx:declarations>

 

          <fx:script>

                    <![cdata[

                              private function loadbtn_clickhandler():void{

                                        var file:file = new file(file.desktopdirectory.nativepath);

                                        file.addeventlistener(event.select, onfileselectionhandler);

                                        file.browseforopen("open image",[new filefilter("images", "*.jpg;*.gif;*.png;*.jpeg")]);

                              }

                              private function onfileselectionhandler(ev:event):void{

                                        var loadedfilepath:string = (ev.target file).nativepath;

                                        loadimageasbitmap(loadedfilepath);

                              }

                              /* load image bitmap using loader */

                              private function loadimageasbitmap(url:string):void{

                                        var loader:loader = new loader();

                                        // load content bitmap

                                        loader.contentloaderinfo.addeventlistener(event.complete, oncontentloadcomplete);

                                        loader.contentloaderinfo.addeventlistener(ioerrorevent.io_error, oncontentloadfail);

                                        loader.load(new urlrequest(url));

                              }

                              private function oncontentloadcomplete(ev:event):void{

                                        var loaderinfo:loaderinfo = ev.target loaderinfo;

                                        var bitmap:bitmap = loaderinfo.content bitmap;

                                        printpixelvalue(bitmap.bitmapdata);

                                        container_id.addchild(bitmap);

                              }

                              private function oncontentloadfail(ioe:ioerrorevent):void{

                                        trace("image load failed");

                              }

                              private function printpixelvalue(bmdata:bitmapdata):void{

                                        var initpixelvalue:number = -1;

                                        //for (var counti:int = 0; counti < bmdata.height; counti++) {

                                        var counti:int = 1;

                                        (var countj:int = 0; countj < bmdata.width; countj++) {

                                                  var pixelvalue:number = bmdata.getpixel32(countj, counti);

                                                  if(pixelvalue != initpixelvalue){

                                                            initpixelvalue = pixelvalue;

                                                            // print pixel value 1 row

                                                            trace("pixel value @ " + counti + "x" + countj + " is: " + pixelvalue);

                                                  }

                                        }

                                        trace("pixel value @ " + counti + "x" + countj + " is: " + pixelvalue);

                                        //}

                              }

                    ]]>

          </fx:script>

          <s:button id="loadbtn_id" label="load!" click="loadbtn_clickhandler()"

                                x="5" y="5" height="20"/>

          <mx:uicomponent id="container_id" x="5" y="30" width="1366" height="768"/>

</s:windowedapplication>

 

 

sample image:

thanks all,

updating sdk 4.6.0 fixed issue

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