Need some help trying to generate thumbnail images from large Jpegs

Question

Hello,
I have some ActionScript 3.0 code, created with Flex that
will load a large JPEG image (say 3000x2000 pixels) that I'm trying
to create a 100 pixel thumbnail. I have the code working where I
generate the thumbnail, but it's not maintaining the aspect ratio
of the original image. It's making it square, filling in white for
the part that doesn't fit.
I've tried just setting the height or width of the new
image, but that doesnt render well, either.
To see what I'm talking about, I made a screen shot, showing
the before image, and the rendered as thumbnail image:
http://www.flickr.com/photos/taude/533544558/.
Now, there's a few things important to note. I'm saving the
thumbnail off as a JPEG. As you can see in my sample application,
the original renders fine with the proper aspect ratio, it's when
I'm copying the bytes off the bitmapdata object, where I need to
specify a width and height, that the trouble starts. I've also
tried using .contentHeight and .contentWidth and some division to
manually specify a new bitmapdatasize, but these values seem to
always have NaN.
private function makeThumbnail():void{
// create a thumbnail of 100x100 pixels of a large file
// What I want to create is a a thumbnail with the longest
size of the aspect
// ratio to be 100 pixels.
var img:Image = new Image();
//Add this event listener because we cant copy the
BitmapData from an
/// image until it is loaded.
img.addEventListener(FlexEvent.UPDATE_COMPLETE,
imageLoaded);
img.width=100;
img.height=100;
img.scaleContent=true;
img.visible = true;
// This is the image we want to make a thumbnail of.
img.load("file:///C:/T5.jpg");
img.id = "testImage";
this.addChildAt(img, 0);
private function imageLoaded(event:Event):void
// Grab the bitmap image from the Input Image and
var bmd:BitmapData =
getBitmapDataFromUIComponent(UIComponent(event.target));
//Render the new thumbnail in the UI to see what it looks
theImage.source = new Bitmap(bmd); //new Bitmap(bmd);
public static function
getBitmapDataFromUIComponent(component:UIComponent):BitmapData
var bmd:BitmapData = new
BitmapData(component.width,component.height );
bmd.draw(component);
return bmd;

Answer 1

Dev is 10gR2 and Prod is earlier version of Oracle, 10gR1.
The schema (or table(s)) export file created by Oracle Database Control in Oracle 10gR2 is not importable into 10gR1, by default.
Workaround.
Use the Schema (table(s) export wizard of in the Maintenance section
of the Oracle Database Control in ver 10R2,
but when you get to the end of the wizard (I recall Step 5),
show the data pump export source PL/SQL code, cut and past to editor,
and find the variable where you can set the Oracle database version
to your prod database version,
then run the script from the SQL Plus prompt in 10gR2 dev,
and this creates an Oracle 10gR1 compatible data export file.
Then go to Prod and run the schema (table(s)) import data wizard,
and import the export file. You will have to option to move the data
to another schema or tablespace if required.
Just to not run into troubles, I use the same schema and tablespace name
in both dev and prod.
the variable you must modify in the 10gR2 datapump export script looks like
h1 := dbms_datapump.open (operation => 'EXPORT', job_mode => 'SCHEMA', job_name => 'ExportTableToProdJob', version => 'COMPATIBLE');
and you must change manually to
h1 := dbms_datapump.open (operation => 'EXPORT', job_mode => 'SCHEMA', job_name => 'ExportTableToProdJob', version => '10.1.0.1');
This creates a 10g1.0.1 or later compatible export data file.
You must have read/write privileges to the folder were the export data file will be created, and imported from. (Oracle Directory Object)