Comments on: CleVR Actionscript libraries now on RIAForge

By: sunmi

sunmi — Fri, 22 Aug 2008 08:28:33 +0000

if i try matt’s code, then can keep exif data??(sorry, my english is poor..)

By: matt

matt — Thu, 10 Jul 2008 08:32:50 +0000

I've added a new post with a more complete description of how to do this (without the typos in this one).

By: Mark

Mark — Thu, 10 Jul 2008 06:52:03 +0000

That’s brilliant, thanks Matt, will try asap and let you know the results!

By: matt

matt — Wed, 09 Jul 2008 22:18:14 +0000

try something like:

var smallPic:BitmapData = new BitmapData(200, 200);
 
var largePic:InterpolatedBitmapData; // Your source  image
 
var xFactor:Number = largePic.width / 200;
var yFactor:Number = largePic.height / 200;
 
for (var x:int = 0; x < 200; x++) {
for (var y:int = 0; y < 200; y++) {
smallPix.setPixel(x, y, largePic.getPixelBicubic(x * xFactor, y * yFactor);
}
}
 
}

By: Mark

Mark — Wed, 09 Jul 2008 21:47:32 +0000

Thanks for getting back to me Matt.
Sorry for asking, but I haven’t delved deep into the realms of BitmapData – could you help point me in the right direction as to how I would use the getPixelBicubic method to resize an image? I’m trying to create an AIR app that resizes my camera photo’s and uploads them to my webspace, so I can just point it at a folder and let it go! I’ve got it working ok, however Flash/Flex gives any jpg’s it makes smaller (e.g. 200 x 200px) a jagged look. I would like to remove this, by using bicubic interpolation, or any other method. Do you have any ideas?

Thanks in advance!

Mark

By: matt

matt — Mon, 07 Jul 2008 11:22:13 +0000

Hi Mark,
You use it in the same way as BitmapData, except instead of getPixel you use getPixelBicubic or getPixelBilinear, where you can pass the coordinates as Numbers rather than ints. Anything not on the pixel boundary is then interpolated.

By: Mark

Mark — Mon, 07 Jul 2008 11:08:25 +0000

Hi,

The interpolation bitmap data class looks really cool, but how do you use it? Do you just use it as you would the bitmap data class? But then how would it know which method to use?

I’ve built a Flex/AIR app that resizes images for you, but when you try to resize a large image to something quite small the result doesn’t look very good! I was hoping to use the bicubic interpolation to make the picture look better (much like photoshop does).

Mark

By: matt

matt — Sun, 11 Nov 2007 09:18:18 +0000

Hi,
Glad you like it! We do have our own class, but it’s based on Kevin Hoyt’s code. I essentially turned it into a slightly more general class, allowing access to the values rather than just dumping them. The class is a bit of a mess though, and only works on some photos – ones with embedded thumbnails in particular can confuse it. I am planning on cleaning it up and adding it to the library.

By: Todd Watson

Todd Watson — Sun, 11 Nov 2007 00:07:32 +0000

Love the AIR app and thanks for providing some great code resources, done so well! I noticed that you auto-orient the image based on the EXIF data and was looking for a class to do this in my own AIR app. I was wondering if you would share that class or if it is pretty much Kevin Hoyt’s code? It seems like that would be a great utility class for AIR for loading client JPGs. Does it require that you do two load calls on the JPG or are you able to load the image and get the EXIF out of the same call?

Todd