How to load an IPlImage from Android ImageView

answered 2013-10-17 14:06:33 -0600

Moster
1716 ●5 ●24

updated 2013-10-17 14:44:44 -0600

Please dont use IplImage on android. IplImage is deprecated in c++ and java.

Here is some code that should basically work. Please test it:

imView.buildDrawingCache();
Bitmap bmap = imView.getDrawingCache();
Bitmap bmapCv = bmap.copy(Bitmap.Config.ARGB_8888, true);
Mat imgMat = new Mat();
Utils.bitmapToMat(bmp32, imgMat);

IplImage for javacv (not tested)

IplImage img = IplImage.create(cvSize(width, height) IPL_DEPTH_8U, 4);
Bitmap bmap = imView.getDrawingCache();
Bitmap bmapCv = bmap.copy(Bitmap.Config.ARGB_8888, true);
bitmap.copyPixelsToBuffer(img.getByteBuffer());

edit flag offensive delete link

Comments

Mat image = Highgui.imread("/sdcard/TVguide/Detection/detected.jpg"); hows this ?

bunta ( 2013-10-17 14:13:20 -0600 )edit

any idea about equivalent of Utils.bitmapToMat(bmp32, imgMat); in javaCV

bunta ( 2013-10-17 14:17:58 -0600 )edit

This does not even fit your question. You were asking how to extract a Mat from an ImageView. Now you just want to load an image with imread? This is something totally different. Also no, Im not familiar with javaCv

Moster ( 2013-10-17 14:25:50 -0600 )edit

javacv wraps iplimages instead of cv::Mat. this is more a shootout between the 'official' opencv java wrappers and javacv

berak ( 2013-10-17 14:35:14 -0600 )edit

Moster.. sorry for that.. yes I admit thats a wrong point of asking ..@berak.. does it mean I can comfortably use IplImage in javaCv ..

bunta ( 2013-10-17 14:37:55 -0600 )edit

@bunta, maybe your question needs a 'javacv' tag, and some explanation, what you're trying to do ?

berak ( 2013-10-17 14:38:12 -0600 )edit

ok I realized one thing that even IplImage.asCvMat is there to use

bunta ( 2013-10-17 14:40:17 -0600 )edit

if you're using javacv, you have to use iplimages. maybe you want to rephrase your question on how to transform pixels from an imageview to a javacv iplimage ( and i can't help you here, not using javacv )

berak ( 2013-10-17 14:42:00 -0600 )edit

thanks @berak for notifying the point of converting pixel to IplImage..I'll look into it

bunta ( 2013-10-17 14:44:06 -0600 )edit

I found something that might work with IplImage. Check my edit.

Moster ( 2013-10-17 14:49:23 -0600 )edit

lol, IplImage.cvMat might still not be the same as Mat in the 'official' java wrappers. just note, that all javacv types are incompatible to receipes you might find on the opencv android docs.

the long story here is : the javacv guys were a it faster with wrapping, but they used theold c-api for anything ( IplImage, CvMat ) which is more and more discarded in favour of using a c++ api and cv::Mat ( and having an own wrapper lib for java using this )

berak ( 2013-10-17 14:50:24 -0600 )edit

His final solution has nothing to do with the actual question :|

Moster ( 2013-10-17 14:55:18 -0600 )edit

see more comments

How to load an IPlImage from Android ImageView

1 answer

Comments

Links

Question Tools

Stats

Related questions

How to load an IPlImage from Android ImageView edit

1 answer

Comments

Links

Question Tools

Stats

Related questions

How to load an IPlImage from Android ImageView