Closing window does not end process

[Vojtěch Frič]

When you display the window with image and then click the X button the window disappear but the Swing thread is still running in background. That is not desirable outcome. To fix this I would suggest adding following code:

frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

For more informations on this topic see this thread:
http://stackoverflow.com/questions/7799940/jframe-exit-on-close-java

[nk]

Hey, Can it be used to display image in an android phone?

[Jan]

Not sure. I don't have the android sdk. Probably not, you'likely want an
image view.

On Wednesday, August 19, 2015, kejriwalnishant1990 [e-mail]
wrote:

Hey, Can it be used to display image in an android phone?

—
Reply to this email directly or view it on GitHub
#1 (comment)
.

[Jan]

http://www.mkyong.com/android/android-imageview-example/

You could fork and submit a pull request

On Wednesday, August 19, 2015, kejriwalnishant1990 [e-mail]
wrote:

Hey, Can it be used to display image in an android phone?

—
Reply to this email directly or view it on GitHub
#1 (comment)
.

[Atul R]

Hi @kejriwalnishant1990
So u can use this function to get an image from your opencv Mat

public BufferedImage toBufferedImage(Mat m) {
        int type = BufferedImage.TYPE_BYTE_GRAY;
        if (m.channels() > 1) {
            type = BufferedImage.TYPE_3BYTE_BGR;
        }
        int bufferSize = m.channels() * m.cols() * m.rows();
        byte[] b = new byte[bufferSize];
        m.get(0, 0, b); // get all the pixels
        BufferedImage image = new BufferedImage(m.cols(), m.rows(), type);
        final byte[] targetPixels = ((DataBufferByte) image.getRaster()
                .getDataBuffer()).getData();
        System.arraycopy(b, 0, targetPixels, 0, b.length);
        return image;

    }

and then use the result in the ImageView of android

[Jan]

Here's the same function if you like this one instead:

/** * Converts the desired inputMat to a {@link BufferedImage} so we can
see it * visually * * @param inputMat * the Matrix to convert to a {@link
BufferedImage} * @return a {@link BufferedImage} with the contents of the
matrix */ public static BufferedImage toBufferedImage(Mat inputMat) {
BufferedImage bi; int height = inputMat.rows(); int width = inputMat.cols();
byte[] imgData = new byte[(int) (inputMat.cols() * inputMat.rows() *
inputMat .elemSize())]; int type = BufferedImage.TYPE_BYTE_GRAY; if
(inputMat.channels() > 1) { type = BufferedImage.TYPE_3BYTE_BGR; } // Copy
the data into the matrix inputMat.get(0, 0, imgData); bi = new
BufferedImage(width,
height, type); bi.getRaster().setDataElements(0, 0, width, height, imgData);
return bi; }

Here's from a buffered image to a matrix:

/** * Creates a {@link Mat} which represents the given BufferedImage * *
@param bufferedImage * @return */ public static Mat toMatrix(BufferedImage
bufferedImage) { int imageType = bufferedImage.getType(); System.out.
println("ImageType:" + imageType); int matrixType = CvType.CV_8UC3; if
(imageType == BufferedImage.TYPE_BYTE_GRAY) matrixType = CvType.CV_8UC1;
byte[] pixels = ((DataBufferByte) bufferedImage.getRaster()
.getDataBuffer()).getData(); Mat matrix = new Mat(new Size(bufferedImage.
getWidth(), bufferedImage.getHeight()), matrixType); matrix.put(0, 0,
pixels); return MatHelper.fromBGR2RGB(matrix); } 

Here you can find some
matrix helper stuff:
https://github.com/AnEmortalKid/ImgProcPlayground/blob/stable/src/main/java/com/anemortalkid/imgutils/MatHelper.java

As always, you're welcome to fork the repository and create a pull request
if you'd like to share your ImShow.showImageView function.

On Wed, Aug 19, 2015 at 9:58 AM, Atul [e-mail] wrote:

Hi @kejriwalnishant1990 https://github.com/kejriwalnishant1990
So u can use this function to get an image from your opencv Mat

public BufferedImage toBufferedImage(Mat m) {
int type = BufferedImage.TYPE_BYTE_GRAY;
if (m.channels() > 1) {
type = BufferedImage.TYPE_3BYTE_BGR;
}
int bufferSize = m.channels() * m.cols() * m.rows();
byte[] b = new byte[bufferSize];
m.get(0, 0, b); // get all the pixels
BufferedImage image = new BufferedImage(m.cols(), m.rows(), type);
final byte[] targetPixels = ((DataBufferByte) image.getRaster()
.getDataBuffer()).getData();
System.arraycopy(b, 0, targetPixels, 0, b.length);
return image;

}

and then use the result in the ImageView of android

—
Reply to this email directly or view it on GitHub
#1 (comment)
.

[nk]

I am not able to find java.awt.image.BufferedImage . Is there any other jar file which i need to add in the code?

[Jan]

Are you importing it? It should be part of the standard library.

http://docs.oracle.com/javase/7/docs/api/java/awt/image/BufferedImage.html

On Wednesday, August 19, 2015, kejriwalnishant1990 [e-mail]
wrote:

I am not able to find java.awt.image.BufferedImage . Is there any other
jar file which i need to add in the code?

—
Reply to this email directly or view it on GitHub
#1 (comment)
.

[nk]

No it is not part of java library for android. I have read on the internet BufferedImage class is not available in android. Is there any alternative?

[Jan]

Not sure about that. Maybe you'll have to write your own based on android's
opencv

On Wednesday, August 19, 2015, kejriwalnishant1990 [e-mail]
wrote:

No it is not part of java library for android. I have read on the internet
BufferedImage class is not available in android. Is there any alternative?

—
Reply to this email directly or view it on GitHub
#1 (comment)
.