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BufferedImage to IplImage and vice versa conversion #23

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
Hi Samuel,

Congrats for such a great tool!

On my project, I need to pass a webcam image that I am controlling with a non 
javacv controller, onto javacv to extract the face only (face detector), and 
return that reduced image back to my main project. For this, I am passing a 
BufferedImage from my
project to my javaCV module, and then I need to convert it to IplImage to do 
all the
processing. However, the conversion from BufferedImage to IpllImage,
as I saw online doesn't seem to work, and I wonder what am I doing
wrong? Here is what I'm doing:

public BufferedImage doFaceDetection(BufferedImage origbffimg)
{
...
IplImage grabbedImage = IplImage.createFrom(origbffimg);
... (do processing, and return the chopped BufferedImage of my face)
}

It does not crash, and it compiles no errors, but it seems to be
failing to do a proper conversion at: IplImage grabbedImage =
IplImage.createFrom(origbffimg);

In fact, I tried a very simple example, to make sure that my problem
was on the conversion part:

public void dumbTest(BufferedImage a)
{

   IplImage b = IplImage.createFrom(a);  //convert BufferedImage "a" into IplImage "b"
   BufferedImage c = b.getBufferedImage();  // convert IplImage "b" from previous step, back into a BufferedImage "c"
// "c" should be the same as "a", but when debugging stepping into, I realised 
they were not!

}

1. What might I be doing wrong?

2. An additional short question: I eliminated the random rotaion of
the plane you were performing on your sample. However, I am not allowed to 
remove the
cvRodrigues2(randomAxis2, randomR2, null) function. If I remove it,
then it crashes on Runtime at: CvHaarClassifierCascade cascade = new
CvHaarClassifierCascade(cvLoad(cascadeName));
Any idea why, since anyway now I'm not using neither randomAxis2 nor
randomR2? Otherwise, how can I safely eliminate all the random plane
rotation part?

Many thanks, and keep the hard work for such a great tool! :)

What steps will reproduce the problem?
1. IplImage b = IplImage.createFrom(a);  //convert BufferedImage "a" into 
IplImage "b"

2.  BufferedImage c = b.getBufferedImage();  // convert IplImage "b" from 
previous step, back into a BufferedImage "c"

What is the expected output? What do you see instead?
// From the above code, I would expect "c" to be the same as "a", but when 
debugging stepping into, I realised they were not!

What version of the product are you using? On what operating system?
OS: Tried it on a Windows 7 machine, JavaCV binary package (2010-07-30) 

Please provide any additional information below.
Many thanks!

Original issue reported on code.google.com by Jorge.Pr...@gmail.com on 25 Sep 2010 at 9:05

GoogleCodeExporter commented 9 years ago 
Can you give more info about how you create the BufferedImage? They should be 
the same, but you may be using an exotic format for which there is bug.. thanks

As for #2, I posted a wiki page about that 
http://code.google.com/p/javacv/wiki/FaceDetection

Original comment by samuel.a...@gmail.com on 25 Sep 2010 at 10:29

GoogleCodeExporter commented 9 years ago 
Thanks Samuel, here is the code (please let me know if you need anything 
further):

public BufferedImage doFaceDetection2(BufferedImage origbffimg)
     {
         BufferedImage bffImage = null;
         try {
             String cascadeName = "lib//javaCVlibs//haarcascade_frontalface_alt.xml";
             CvErrorCallback redirectError2 = new JavaCvErrorCallback().redirectError();

             // Using a display CanvasFrame only for testing: it does not display the BufferedImage after conversion!
             CanvasFrame frame = new CanvasFrame("Face Detection");
             // Convert BufferedImage to IplImage: this seems not to work!
             IplImage grabbedImage = IplImage.createFrom(origbffimg);
             // To verify, let's convert from IplImage back to BufferedImage. The original image is not recovered!
             BufferedImage bfim = grabbedImage.getBufferedImage();
             frame.showImage(bfim); // Failed
             IplImage grayImage = IplImage.create(grabbedImage.width, grabbedImage.height, IPL_DEPTH_8U, 1);
             //IplImage rotatedImage = grabbedImage.clone();

             // I would like to eliminate this random 3D rotation, but I cannot eliminate cvRodrigues2 even thought I am not using neither randomAxis2 nor randomR2! Solution (thanks to Samuel, and openCV):            
// Because on javaCV we cannot "use cxcored.lib, cvd.lib and highguid.lib 
instead of cxcored_i7.lib, cv.lib and highgui.lib" as suggested on openCV,  We 
need to use either choice 1 or 2 (Unsure what is more efficient?). Otherwise 
you get runtime error:

// Choice 1: Let's create some random 3D rotation...
             CvMat randomR2 = CvMat.create(3, 3), randomAxis2 = CvMat.create(3, 1);
             cvRodrigues2(randomAxis2, randomR2, null);

// Choice 2: create dumb image, apply cvErode, then release it: 
            IplImage srcTest = grabbedImage.clone();
            IplImage imgTest = grabbedImage.clone();
            int posTest = 0;
            cvErode(srcTest, imgTest, null, posTest);
            cvReleaseImage(srcTest.pointerByReference());
            cvReleaseImage(imgTest.pointerByReference());
// More details of this problem can be seen at:
// http://code.google.com/p/javacv/wiki/FaceDetection
// http://opencv.willowgarage.com/wiki/FaceDetection

             CvHaarClassifierCascade cascade = new CvHaarClassifierCascade(cvLoad(cascadeName));

             CvMemStorage storage = CvMemStorage.create();

             CvSeq.PointerByReference contourPointer = new CvSeq.PointerByReference();
             //int sizeofCvContour = com.sun.jna.Native.getNativeSize(CvContour.ByValue.class);
             cvCvtColor(grabbedImage, grayImage, CV_BGR2GRAY);
             CvSeq faces = cvHaarDetectObjects(grayImage, cascade, storage, 1.1, 3, 0/*CV_HAAR_DO_CANNY_PRUNING*/);

             // This code will return a square with the face closest to the webcam only, rather than just painting a square on the original image:
             if (faces.total > 0) 
             {
                 CvRect r = new CvRect(cvGetSeqElem(faces, faces.total - 1/*i*/));
                 // Get the region of the face only:
                 cvSetImageROI(grabbedImage, r.byValue());
                 /* create destination image*/
                 IplImage fcimg = cvCreateImage(cvGetSize(grabbedImage), grabbedImage.depth, grabbedImage.nChannels);
                 /* copy subimage */
                 cvCopy(grabbedImage, fcimg, null);
                 /* always reset the Region of Interest */
                 cvResetImageROI(grabbedImage);
                 // Convert the IplImage face into BufferedImage
                 bffImage = fcimg.getBufferedImage();

             } else {
                 // No face detected, need to add some code here for those cases
             }

             cvClearMemStorage(storage);

         } catch (Exception e) {
             e.printStackTrace();
         }
         // Return the face in BufferedImage format
         return bffImage;
    }

public BufferedImage captureBufferedImage()
{
  // This was extracted with some modifications from the sun forum at: http://forums.sun.com/thread.jspa?threadID=5357045
// It works very fine, both the real time video and capture (displayed on GUI 
on jLables)

        FrameGrabbingControl fgc = (FrameGrabbingControl) camagain.player.getControl("javax.media.control.FrameGrabbingControl");

        Buffer BUF = fgc.grabFrame();

        // Convert it to an image
        BufferToImage BtoI = new BufferToImage((VideoFormat) BUF.getFormat());
        Image img = BtoI.createImage(BUF);

        BufferedImage buffimgMod = (BufferedImage) img;

        return buffimgMod;
}

public static void main(String[] args){

           BufferedImage bfi = captureBufferedImage();
           BufferedImage buffalo = fdobj.doFaceDetection(bfi); // Problem!
}

Original comment by Jorge.Pr...@gmail.com on 25 Sep 2010 at 3:56

GoogleCodeExporter commented 9 years ago 
Could you send me the output of "System.out.println(bfi)" in your main() 
function? It would help, thanks

Original comment by samuel.a...@gmail.com on 28 Sep 2010 at 2:08

GoogleCodeExporter commented 9 years ago 
Sure:

1. Sys.out.println(bfi): the Original BufferedImage captured:
BufferedImage@59c8b5: type = 1 DirectColorModel: rmask=ff0000 gmask=ff00 
bmask=ff amask=0 IntegerInterleavedRaster: width = 320 height = 240 #Bands = 3 
xOff = 0 yOff = 0 dataOffset[0] 0

2. Sys.out.println(grabbedImage): The IplImage I obtain by using: "IplImage 
grabbedImage = IplImage.createFrom(origbffimg);". Sys.out.println(grabbedImage):
cxcore$IplImage(native@0x20648030) (112 bytes) {
  int nSize@0=70
  int ID@4=0
  int nChannels@8=3
  int alphaChannel@c=0
  int depth@10=80000020
  byte colorModel0@14=52
  byte colorModel1@15=47
  byte colorModel2@16=42
  byte colorModel3@17=0
  byte channelSeq0@18=42
  byte channelSeq1@19=47
  byte channelSeq2@1a=52
  byte channelSeq3@1b=0
  int dataOrder@1c=0
  int origin@20=0
  int align@24=4
  int width@28=140
  int height@2c=f0
  cxcore$IplROI$ByReference roi@30=null
  cxcore$IplImage$ByReference maskROI@34=null
  Pointer imageId@38=null
  cxcore$IplTileInfo tileInfo@3c=null
  int imageSize@40=e1000
  Pointer imageData@44=native@0x21260030
  int widthStep@48=f00
  int BorderMode0@4c=0
  int BorderMode1@50=0
  int BorderMode2@54=0
  int BorderMode3@58=0
  int BorderConst0@5c=0
  int BorderConst1@60=0
  int BorderConst2@64=0
  int BorderConst3@68=0
  Pointer imageDataOrigin@6c=native@0x21260030
}

3. BufferedImage bfim (convert back to BufferedImage and compare with original. 
You can see they differ): grabbedImage.getBufferedImage(); 
Sys.out.println(bfim):
BufferedImage@91cf0b: type = 0 ColorModel: #pixelBits = 96 numComponents = 3 
color space = java.awt.color.ICC_ColorSpace@b00ec2 transparency = 1 has alpha = 
false isAlphaPre = false sun.awt.image.SunWritableRaster@98f352

If I try to use frame.showImage(grabbedImage) (or showImage(bfim) which is 
equivalent), I get:
Exception in thread "AWT-EventQueue-0" java.lang.Error: Cannot call 
invokeAndWait from the event dispatcher thread
        at java.awt.EventQueue.invokeAndWait(EventQueue.java:981)
        at name.audet.samuel.javacv.CanvasFrame.showImage(CanvasFrame.java:275)
        at name.audet.samuel.javacv.CanvasFrame.showImage(CanvasFrame.java:291)
        at name.audet.samuel.javacv.CanvasFrame.showImage(CanvasFrame.java:294)
        at name.audet.samuel.javacv.CanvasFrame.showImage(CanvasFrame.java:308)
        at jlp.javaCVpkg.FaceDetection.doFaceDetection(FaceDetection.java:74)

If it is hard to see what might be the problem, we can have a quick skype 
session, and if we find the problem, we can always post the answer here, please 
let me know.
You also have my email address.

Many thanks,
Jorge

Original comment by Jorge.Pr...@gmail.com on 28 Sep 2010 at 3:10

GoogleCodeExporter commented 9 years ago 
By the way, notice that on the point  2., bfi and origbffimg are the same in my 
programme (it is called bfi inside this function, and I pass that as parameter, 
but outside where the function is called, that parameter is called bfi, so they 
are the same object

Original comment by Jorge.Pr...@gmail.com on 28 Sep 2010 at 3:14

GoogleCodeExporter commented 9 years ago 
I had not implemented any support for DirectColorModel.. also, 
IplImage.getBufferedImage() would recreate the BufferedImage, even if the 
IplImage was originally created using createFrom() or copied from using 
copyFrom(). I fixed that, at least of the common BufferedImage types that use 
DirectColorModel like TYPE_INT_RGB. Can you try the test version at the URL 
below and let me know if it works all right? Thanks
    http://www.ok.ctrl.titech.ac.jp/~saudet/javacv.jar

Original comment by samuel.a...@gmail.com on 2 Oct 2010 at 4:32

GoogleCodeExporter commented 9 years ago 
Hi Samuel,

Thanks for getting back. This new javacv version seems to have solved the 
BufferedImage to IplImage conversion problem! However, the rest of the 
functions seem not to be able to deal with this "new" IplImage or BufferedImage 
format. More specifically (point A shows that conversion now seems to work 
fine; point B shows however how the format is not working with the rest of the 
face detection functions):
A) Convesion seems to work fine, because now it prints:
* Original BufferedImage:
BufferedImage@16721bd: type = 1 DirectColorModel: rmask=ff0000 gmask=ff00 
bmask=ff amask=0 IntegerInterleavedRaster: width = 320 height = 240 #Bands = 3 
xOff = 0 yOff = 0 dataOffset[0] 0

* BufferedImage parsed to my javacv class (parse working fine, same as before):
System.out.println(origbffimg):
BufferedImage@16721bd: type = 1 DirectColorModel: rmask=ff0000 gmask=ff00 
bmask=ff amask=0 IntegerInterleavedRaster: width = 320 height = 240 #Bands = 3 
xOff = 0 yOff = 0 dataOffset[0] 0

* IplImage obtained from origbffimg:
IplImage grabbedImage = IplImage.createFrom(origbffimg);
System.out.println(grabbedImage):
cxcore$IplImage(native@0x1f502ec0) (112 bytes) {
  int nSize@0=70
  int ID@4=0
  int nChannels@8=4
  int alphaChannel@c=0
  int depth@10=8
  byte colorModel0@14=52
  byte colorModel1@15=47
  byte colorModel2@16=42
  byte colorModel3@17=0
  byte channelSeq0@18=42
  byte channelSeq1@19=47
  byte channelSeq2@1a=52
  byte channelSeq3@1b=41
  int dataOrder@1c=0
  int origin@20=0
  int align@24=4
  int width@28=140
  int height@2c=f0
  cxcore$IplROI$ByReference roi@30=null
  cxcore$IplImage$ByReference maskROI@34=null
  Pointer imageId@38=null
  cxcore$IplTileInfo tileInfo@3c=null
  int imageSize@40=4b000
  Pointer imageData@44=native@0x1f502f50
  int widthStep@48=500
  int BorderMode0@4c=0
  int BorderMode1@50=0
  int BorderMode2@54=0
  int BorderMode3@58=0
  int BorderConst0@5c=0
  int BorderConst1@60=0
  int BorderConst2@64=0
  int BorderConst3@68=0
  Pointer imageDataOrigin@6c=native@0x1f502f50
}

* BufferedImage recovered back (this time, it is the same as origbffimg, which 
is a good sign!):
BufferedImage bfim = grabbedImage.getBufferedImage();
System.out.println(bfim):
BufferedImage@16721bd: type = 1 DirectColorModel: rmask=ff0000 gmask=ff00 
bmask=ff amask=0 IntegerInterleavedRaster: width = 320 height = 240 #Bands = 3 
xOff = 0 yOff = 0 dataOffset[0] 0

B) However, the new IplImage seems not to work very well with the rest of the 
face detection code. For example, it crashes if I do:
frame.showImage(grabbedImage);

It seems like the algorithm is indeed detecting the right number of faces 
though, I tried it with 1, 2 and 3 faces, and the "faces.total" did have values 
1, 2 and 3 respectively. But the format still seems to be odd for some 
functions, so neither my main java core program can display the BufferedImage I 
return back from my javacv function, nor within the actual javacv function I 
can display the image by frame.showImage -> I tried frame.showImage both with 
the IplImage and with the BufferedImage, but with no success. Please let me 
know.

Exception in thread "AWT-EventQueue-0" java.lang.Error: Cannot call 
invokeAndWait from the event dispatcher thread
        at java.awt.EventQueue.invokeAndWait(EventQueue.java:981)
        at name.audet.samuel.javacv.CanvasFrame.showImage(CanvasFrame.java:287)
        at name.audet.samuel.javacv.CanvasFrame.showImage(CanvasFrame.java:303)
        at name.audet.samuel.javacv.CanvasFrame.showImage(CanvasFrame.java:306)
        at name.audet.samuel.javacv.CanvasFrame.showImage(CanvasFrame.java:320)
        at jlp.javaCVpkg.FaceDetection.doFaceDetection(FaceDetection.java:136)
        at jlp.DNNemotRec.EmotionRecForm.jButtonFaceDetActionPerformed(EmotionRecForm.java:331)
        at jlp.DNNemotRec.EmotionRecForm.access$500(EmotionRecForm.java:38)
        at jlp.DNNemotRec.EmotionRecForm$5.actionPerformed(EmotionRecForm.java:158)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
        at java.awt.Component.processMouseEvent(Component.java:6263)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
        at java.awt.Component.processEvent(Component.java:6028)
        at java.awt.Container.processEvent(Container.java:2041)
        at java.awt.Component.dispatchEventImpl(Component.java:4630)
        at java.awt.Container.dispatchEventImpl(Container.java:2099)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
        at java.awt.Container.dispatchEventImpl(Container.java:2085)
        at java.awt.Window.dispatchEventImpl(Window.java:2478)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

Original comment by Jorge.Pr...@gmail.com on 2 Oct 2010 at 2:41

GoogleCodeExporter commented 9 years ago 
Also notice this. The original (full image) BufferedImage is:
BufferedImage@da1515: type = 2 DirectColorModel: rmask=ff0000 gmask=ff00 
bmask=ff amask=ff000000 IntegerInterleavedRaster: width = 97 height = 97 #Bands 
= 4 xOff = 0 yOff = 0 dataOffset[0] 0

Then I do the face detection, and create a new IplImage with the detected face 
only, which I convert to BufferedImage and pass back to my main project (same 
old code as before, copied again below this text for reference **). However, 
this is what I get for the new face-detected image extracted:

BufferedImage@643edd: type = 1 DirectColorModel: rmask=ff0000 gmask=ff00 
bmask=ff amask=0 IntegerInterleavedRaster: width = 320 height = 240 #Bands = 3 
xOff = 0 yOff = 0 dataOffset[0] 0

Notice it has different type (1 rather than 2), different #Bands (3 rather than 
4), etc. In case this might help.

**
if (faces.total > 0) 
             {
                 CvRect r = new CvRect(cvGetSeqElem(faces, faces.total - 1/*i*/));
                 // Get the region of the face only:
                 cvSetImageROI(grabbedImage, r.byValue());
                 /* create destination image*/
                 IplImage fcimg = cvCreateImage(cvGetSize(grabbedImage), grabbedImage.depth, grabbedImage.nChannels);
                 /* copy subimage */
                 cvCopy(grabbedImage, fcimg, null);
                 /* always reset the Region of Interest */
                 cvResetImageROI(grabbedImage);
                 // Convert the IplImage face into BufferedImage
                 bffImage = fcimg.getBufferedImage();

             } else {
                 // No face detected, need to add some code here for those cases
             }

Original comment by Jorge.Pr...@gmail.com on 2 Oct 2010 at 3:20

GoogleCodeExporter commented 9 years ago 
It works, good. About the other things:

"Cannot call invokeAndWait from the event dispatcher thread" -> I'll fix that, 
but you should not do processing on the EDT anyway.. use another thread

If you want a specific type for your BufferedImage, you should create the 
BufferedImage first, then use IplImage.createFrom().

Original comment by samuel.a...@gmail.com on 2 Oct 2010 at 3:42