Actionscript 3: How to remove all black pixels from BitmapData ?

Posted by Adnan Doric on Stack Overflow See other posts from Stack Overflow or by Adnan Doric
Published on 2010-04-19T12:01:20Z Indexed on 2010/04/19 12:03 UTC
Read the original article Hit count: 322

Filed under:

actionscript-3

|

bitmapdata

Hello,

Let say I have a BitmapData with different pixels representing an object, and some black pixels around it that I want to remove.

I would like to obtain a new BitmapData, with width and height of the object represented by non-black pixels.

For example, let say I have a BitmapData 400x400px, but the object represented by non-black pixels occupies the rect: x=100, y=100, width=200, height=200. I want to get new BitmapData representing that rect, all black pixels should be removed.

Any idea on how to do this please ?

© Stack Overflow or respective owner

Related posts about actionscript-3

actionscript - testing actionscript via command line

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, I would like to know if is there any easy way to test actionscript by using some kind of application like ruby's irb or javasctip spidermonkey where you can just open up your terminal and type the code straight away. This would be a good time saver when speaking of actionscript, since to test… >>> More
using SeekToNavCuePoint with Custom Cue Points created by ActionScript

as seen on Stack Overflow - Search for 'Stack Overflow'
i have custom flvPlayBack player, i want to do like add Custom CuePoints using ActionScript and making one button Event , On click of that button , Flv should seek to that CuePoints added using ActionScript . I am using below code to do that. var rtn_obj:Object; //create cue point object my_FLVPlybk… >>> More
How's ActionScript 3.0 supported on symbian,android,iphone and windowCE?

as seen on Stack Overflow - Search for 'Stack Overflow'
Anyone knows? To deal with all the things you can do with FMS3, you have two additional language Application Program Interfaces (APIs). Both APIs are extensions of ActionScript and are called Client-Side Media ActionScript and Server-Side Media ActionScript, or in this book, simply… >>> More
Embed custom font in Actionscript 3 project

as seen on Stack Overflow - Search for 'Stack Overflow'
I want to display "Hello World" with calibri.ttf using only AC3. How would I do that? Found two solutions on the web but I cannot use any of them - The Adobe documentation site requires the use of Flash CS4. (Don't know how to use this in Flex Builder) - The embed tag method requires FLEX SDK Is… >>> More
Embed custom font in Actionscript 3 project

as seen on Stack Overflow - Search for 'Stack Overflow'
I want to display "Hello World" with calibri.ttf using only AC3. How would I do that? Found two solutions on the web but I cannot use any of them - The Adobe documentation site requires the use of Flash CS4. (Don't know how to use this in Flex Builder) - The embed tag method requires FLEX SDK Is… >>> More

Related posts about bitmapdata

Placement coordinates of bitmapData in AS3

as seen on Stack Overflow - Search for 'Stack Overflow'
i've programatically created a vector graphic (rect), repositioned the graphic, and set up an MOUSE_MOVE eventListener to trace color information of the graphic using getPixel(). however, the bitmapData is placed at 0,0 of the stage and i don't know how to move it so that it matches the graphic's… >>> More
[AS3] BitmapData cut-off

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, I am writing a MovieClip rasterizer which rasterizes all the frames in the specified movieclip. Here's the code for rasterizing: for ( var i:int = start; i <= end; i++ ) { //goto the next frame clip.gotoAndStop( i ); //get the bounds bounds = clip.getBounds(clip); //create a new… >>> More
Trying to capture stage area using BitmapData

as seen on Stack Overflow - Search for 'Stack Overflow'
I am trying to grab part of stage area using BitmapData and copyPixels method: bmd = new BitmapData(stage.stageWidth, stage.stageHeight); bmdRect = new BitmapData(320, 240); rectangle = new Rectangle(360, 20, 320, 240); bmdRect.copyPixels(bmd, rectangle, new Point()); bmd.draw(bmp); bmp = new… >>> More
EOF error encountered while converting bytearray to bitmapdata

as seen on Stack Overflow - Search for 'Stack Overflow'
I am using var bitmapdata:BitmapData=new BitmapData(); var pixels:Bytearray=new Bytearray(); pixels = rleDecodePixles(); bitmapdata.setPixels(bitmapdata.rect, pixels); In the 4th line in the code above i am getting "Error: Error #2030: End of file was encountered." I checked the length of the… >>> More
invalidArgumentError: Error #2015: Invalid BitmapData

as seen on Stack Overflow - Search for 'Stack Overflow'
the error is ArgumentError: Error #2015: Invalid BitmapData. at flash.display::BitmapData/get width() recently i write code in flex to upload a image in canvas and modify it. first i convert the image bitmapdata then use it. but problem is after upload some image the above error display. the… >>> More