refining image

[Larienas]

Hi Samuel,

  I have an image extracted using MaskRCNN on the left handside. Is it possible with openCV/JavaCV to convert to image on right handside?

Hi Samuel,

With Regards,

Lariena

  

[Samuel Audet]

That looks like the kind of job for something like GrabCut:
https://docs.opencv.org/master/d8/d83/tutorial_py_grabcut.html
https://docs.opencv.org/master/d8/d34/samples_2cpp_2grabcut_8cpp-example.html
The C++ sample code shouldn't be too hard to translate to Java, but
please let me know if you encounter any issues!

On 3/10/21 9:31 PM, Larienas wrote:
> Hi Samuel,
>
>   I have an image extracted using MaskRCNN on the left handside. Is it
> possible with openCV/JavaCV to convert to image on right handside?
>
>

> With Regards,
> Lariena

[larien...@gmail.com]

Hi Samuel,

Please see my code below

public static void main(String[] args) throws IOException {

String file = "C:\\Users\\OpenCV\\1.jpg";
Mat image = load(new File(file), IMREAD_COLOR);

String maskFile = "C:\\Users\\OpenCV\\1_mask.jpg";
Mat maskimage = load(new File(maskFile), IMREAD_GRAYSCALE);

show(toMat8U(image), "original");

int iterCount = 5;
int mode = GC_INIT_WITH_MASK;

// Need to allocate arrays for temporary data
Mat bgdModel = new Mat();
Mat fgdModel = new Mat();

// GrabCut segmentation
grabCut(image, maskimage, new Rect(), bgdModel, fgdModel, iterCount, mode);

show(toMat8U(image), "Result foreground mask");
}

I am getting error as
Exception in thread "main" java.lang.RuntimeException: OpenCV(4.1.2) C:\projects\javacpp-presets\opencv\cppbuild\windows-x86_64\opencv-4.1.2\modules\imgproc\src\grabcut.cpp:344: error: (-5:Bad argument) mask element value must be equal GC_BGD or GC_FGD or GC_PR_BGD or GC_PR_FGD in function 'checkMask'

at org.bytedeco.opencv.global.opencv_imgproc.grabCut(Native Method)
at com. GrabCut.main(Ex5GrabCut.java:46)

I have also attached both the image and mask I got from Mask RCNN

With Regards,
Lariena

[Larienas Sujith]

Hi Samuel,

  I was wondering is it possible to make the black part of the images in my previous mail 1.jpg and 1_mask.jpg transparent?

With Regards,

Lariena

[Samuel Audet]

OpenCV functions don't support transparency, but we can consider the channels however we want, yes. You'll need to follow the requirements of the algorithm for the mask though. We can't use any arbitrary values!

[larien...@gmail.com]

Hi Samuel,

 

  Thanks for your reply 😊. When you say “we can consider channels however we want” that mean it is possible to do it or not?

 

With Regards,

Lariena

[larien...@gmail.com]

Hi Samuel,

 

  Playing with channels solved the issue. Thanks for your guidance.

 

With Regards,

Lariena

 

From: Samuel Audet <samuel...@gmail.com>
Sent: samedi 13 mars 2021 10:24
To: Larienas Sujith <larien...@gmail.com>
Cc: javacv <jav...@googlegroups.com>