Show image quality as like original image after resize in as3.

[Santosh_Rangrajan]

Hi Guys,

I am working on a Action Script3 project and i am showing images after resizing. I am using Bitmap and BitmapData manipulation for this but not getting image quality as like original image.  Please guide and help me with code that how can i do this.

Thanks & regards

Rangrajan

[Guest]

How are you resizing? Normally, you would draw the original bitmap data into the new bitmap data, using a matrix to resize. To smooth scale, you need to use the smoothing option of the draw method. Here's a little sample that takes a library image and scales it to 500x500, using smoothing:

var orig:BitmapData = new baseMap(); //library image

var res:BitmapData = new BitmapData(500,500);

var m:Matrix = new Matrix();

m.scale(res.width / orig.width, res.height / orig.height);

res.draw(orig, m, null, null, null, true);

var c:Bitmap = new Bitmap(res);

addChild(c);

toggle the true to false in the draw, to see the difference...

[Santosh_Rangrajan]

thanks dmennenoh for replying me with example and code. But I am doing as like you have told and getting poor quality than oroginal image.

regards

Rangrajan

[Guest]

Let's see an example of your problem then. You're not going to get Photoshop quality scaling - in Flash this is scaling with the vector renderer, it's made for speed vs quality. But with smoothing on I find the scaling to be quite acceptable.

[Santosh_Rangrajan]

thanks dmennenoh,

I am agree with u that with smoothing true image quality is much better than without smoothing. But I am getting much difference in quality when image has taken as screen short image with any extension as jpg/png/bmp/gif etc.

Can we get screen short image quality as like original after resize? Please help me ..

Regrads

Rangrajan.