Loading screenshot into Mat
0
I am using a Robot to capture a screenshot. In order to avoid unnecessary I/O of writing the BufferedImage on disk and then loading it back up into a Mat I am trying to load the BufferedImage directly into a Mat with the following code.
public static Mat screenShot() throws AWTException, IOException {
Robot r = new Robot();
Rectangle capture = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
BufferedImage Image = r.createScreenCapture(capture);
Mat mat = new Mat(Image.getHeight(), Image.getWidth(), CvType.CV_8UC1);
byte data = ((DataBufferByte) Image.getRaster().getDataBuffer()).getData();
mat.put(0, 0, data);
return mat;
}
I am getting this error:
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: java.awt.image.DataBufferInt cannot be cast to java.awt.image.DataBufferByte
How might I go about circumventing this issue?
java opencv bufferedimage mat
asked Nov 10 at 13:04
user2441988
32
add a comment |
0
I am using a Robot to capture a screenshot. In order to avoid unnecessary I/O of writing the BufferedImage on disk and then loading it back up into a Mat I am trying to load the BufferedImage directly into a Mat with the following code.
public static Mat screenShot() throws AWTException, IOException {
Robot r = new Robot();
Rectangle capture = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
BufferedImage Image = r.createScreenCapture(capture);
Mat mat = new Mat(Image.getHeight(), Image.getWidth(), CvType.CV_8UC1);
byte data = ((DataBufferByte) Image.getRaster().getDataBuffer()).getData();
mat.put(0, 0, data);
return mat;
}
I am getting this error:
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: java.awt.image.DataBufferInt cannot be cast to java.awt.image.DataBufferByte
How might I go about circumventing this issue?
java opencv bufferedimage mat
asked Nov 10 at 13:04
user2441988
32
check this
– Redanium
Nov 10 at 14:33
It doesn't really help me as I can't change the type of my BufferedImage since it gets initialized by the return of my robot's screencapture.
– user2441988
Nov 10 at 19:36
add a comment |
0
0
0
I am using a Robot to capture a screenshot. In order to avoid unnecessary I/O of writing the BufferedImage on disk and then loading it back up into a Mat I am trying to load the BufferedImage directly into a Mat with the following code.
public static Mat screenShot() throws AWTException, IOException {
Robot r = new Robot();
Rectangle capture = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
BufferedImage Image = r.createScreenCapture(capture);
Mat mat = new Mat(Image.getHeight(), Image.getWidth(), CvType.CV_8UC1);
byte data = ((DataBufferByte) Image.getRaster().getDataBuffer()).getData();
mat.put(0, 0, data);
return mat;
}
I am getting this error:
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: java.awt.image.DataBufferInt cannot be cast to java.awt.image.DataBufferByte
How might I go about circumventing this issue?
java opencv bufferedimage mat
asked Nov 10 at 13:04
user2441988
32
I am using a Robot to capture a screenshot. In order to avoid unnecessary I/O of writing the BufferedImage on disk and then loading it back up into a Mat I am trying to load the BufferedImage directly into a Mat with the following code.
public static Mat screenShot() throws AWTException, IOException {
Robot r = new Robot();
Rectangle capture = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
BufferedImage Image = r.createScreenCapture(capture);
Mat mat = new Mat(Image.getHeight(), Image.getWidth(), CvType.CV_8UC1);
byte data = ((DataBufferByte) Image.getRaster().getDataBuffer()).getData();
mat.put(0, 0, data);
return mat;
}
I am getting this error:
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: java.awt.image.DataBufferInt cannot be cast to java.awt.image.DataBufferByte
How might I go about circumventing this issue?
java opencv bufferedimage mat
java opencv bufferedimage mat
asked Nov 10 at 13:04
user2441988
32
asked Nov 10 at 13:04
user2441988
32
asked Nov 10 at 13:04
user2441988
32
asked Nov 10 at 13:04
user2441988
32
asked Nov 10 at 13:04
user2441988
32
32
check this
– Redanium
Nov 10 at 14:33
It doesn't really help me as I can't change the type of my BufferedImage since it gets initialized by the return of my robot's screencapture.
– user2441988
Nov 10 at 19:36
add a comment |
check this
– Redanium
Nov 10 at 14:33
It doesn't really help me as I can't change the type of my BufferedImage since it gets initialized by the return of my robot's screencapture.
– user2441988
Nov 10 at 19:36
check this
– Redanium
Nov 10 at 14:33
check this
– Redanium
Nov 10 at 14:33
It doesn't really help me as I can't change the type of my BufferedImage since it gets initialized by the return of my robot's screencapture.
– user2441988
Nov 10 at 19:36
It doesn't really help me as I can't change the type of my BufferedImage since it gets initialized by the return of my robot's screencapture.
– user2441988
Nov 10 at 19:36
add a comment |
1 Answer
1
active
oldest
votes
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I found a workaround on this thread, ultraviolet's response deals with the issue.
Working code:
public static Mat screenShot() throws AWTException, IOException {
Robot r = new Robot();
Rectangle capture = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
BufferedImage Image = r.createScreenCapture(capture);
Mat mat = BufferedImage2Mat(Image);
return mat;
}
public static Mat BufferedImage2Mat(BufferedImage image) throws IOException {
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ImageIO.write(image, "jpg", byteArrayOutputStream);
byteArrayOutputStream.flush();
return Imgcodecs.imdecode(new MatOfByte(byteArrayOutputStream.toByteArray()), Imgcodecs.CV_LOAD_IMAGE_UNCHANGED);
}
answered Nov 10 at 20:05
user2441988
32
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
I found a workaround on this thread, ultraviolet's response deals with the issue.
Working code:
public static Mat screenShot() throws AWTException, IOException {
Robot r = new Robot();
Rectangle capture = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
BufferedImage Image = r.createScreenCapture(capture);
Mat mat = BufferedImage2Mat(Image);
return mat;
}
public static Mat BufferedImage2Mat(BufferedImage image) throws IOException {
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ImageIO.write(image, "jpg", byteArrayOutputStream);
byteArrayOutputStream.flush();
return Imgcodecs.imdecode(new MatOfByte(byteArrayOutputStream.toByteArray()), Imgcodecs.CV_LOAD_IMAGE_UNCHANGED);
}
answered Nov 10 at 20:05
user2441988
32
add a comment |
0
I found a workaround on this thread, ultraviolet's response deals with the issue.
Working code:
public static Mat screenShot() throws AWTException, IOException {
Robot r = new Robot();
Rectangle capture = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
BufferedImage Image = r.createScreenCapture(capture);
Mat mat = BufferedImage2Mat(Image);
return mat;
}
public static Mat BufferedImage2Mat(BufferedImage image) throws IOException {
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ImageIO.write(image, "jpg", byteArrayOutputStream);
byteArrayOutputStream.flush();
return Imgcodecs.imdecode(new MatOfByte(byteArrayOutputStream.toByteArray()), Imgcodecs.CV_LOAD_IMAGE_UNCHANGED);
}
answered Nov 10 at 20:05
user2441988
32
add a comment |
0
0
0
I found a workaround on this thread, ultraviolet's response deals with the issue.
Working code:
public static Mat screenShot() throws AWTException, IOException {
Robot r = new Robot();
Rectangle capture = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
BufferedImage Image = r.createScreenCapture(capture);
Mat mat = BufferedImage2Mat(Image);
return mat;
}
public static Mat BufferedImage2Mat(BufferedImage image) throws IOException {
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ImageIO.write(image, "jpg", byteArrayOutputStream);
byteArrayOutputStream.flush();
return Imgcodecs.imdecode(new MatOfByte(byteArrayOutputStream.toByteArray()), Imgcodecs.CV_LOAD_IMAGE_UNCHANGED);
}
answered Nov 10 at 20:05
user2441988
32
I found a workaround on this thread, ultraviolet's response deals with the issue.
Working code:
public static Mat screenShot() throws AWTException, IOException {
Robot r = new Robot();
Rectangle capture = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
BufferedImage Image = r.createScreenCapture(capture);
Mat mat = BufferedImage2Mat(Image);
return mat;
}
public static Mat BufferedImage2Mat(BufferedImage image) throws IOException {
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ImageIO.write(image, "jpg", byteArrayOutputStream);
byteArrayOutputStream.flush();
return Imgcodecs.imdecode(new MatOfByte(byteArrayOutputStream.toByteArray()), Imgcodecs.CV_LOAD_IMAGE_UNCHANGED);
}
answered Nov 10 at 20:05
user2441988
32
answered Nov 10 at 20:05
user2441988
32
answered Nov 10 at 20:05
user2441988
32
answered Nov 10 at 20:05
user2441988
32
32
add a comment |
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check this
– Redanium
Nov 10 at 14:33
It doesn't really help me as I can't change the type of my BufferedImage since it gets initialized by the return of my robot's screencapture.
– user2441988
Nov 10 at 19:36