I tried reading an image from drawable folder. I am using eclipse ide. I ran the below code but the image was not loaded. The code is taken from here
Mat image = new Mat(new Size(500,500 ),CvType.CV_8U);// Change CvType as you need.
image = Highgui.imread("icon.png");
if(image.empty()) {
Log.i(TAG, "Empty image!");
}
My
Screenshot of my drawable folder is below :
How can I load this image?
You can just simply do this
Mat m = Utils.loadResource(MainActivity.this, R.drawable.img, Imgcodecs.CV_LOAD_IMAGE_GRAYSCALE);
Bitmap bm = Bitmap.createBitmap(m.cols(), m.rows(),Bitmap.Config.ARGB_8888);
Utils.matToBitmap(m, bm);
ImageView iv = (ImageView) findViewById(R.id.imageView1);
iv.setImageBitmap(bm);
Utils.loadResource(Context, int)
I found an example for this work.
InputStream inpT = getResources().openRawResource(R.drawable.imgt);
mTemp = readInputStreamIntoMat(inpT);
private static Mat readInputStreamIntoMat(InputStream inputStream) throws IOException {
// Read into byte-array
byte[] temporaryImageInMemory = readStream(inputStream);
// Decode into mat. Use any IMREAD_ option that describes your image appropriately
Mat outputImage = Highgui.imdecode(new MatOfByte(temporaryImageInMemory), Highgui.IMREAD_GRAYSCALE);
return outputImage;
}
private static byte[] readStream(InputStream stream) throws IOException {
// Copy content of the image to byte-array
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
int nRead;
byte[] data = new byte[16384];
while ((nRead = stream.read(data, 0, data.length)) != -1) {
buffer.write(data, 0, nRead);
}
buffer.flush();
byte[] temporaryImageInMemory = buffer.toByteArray();
buffer.close();
stream.close();
return temporaryImageInMemory;
}
should be doing instead is:
Mat m = Highgui.imread(file.getAbsolutePath());
getResources().openRawResource(R.drawable.icon). Or maybe Highgui can read from resources?imread()of course. That's why i asked youPlease tell if Highgui has a method to read from an inputstream.. So why didn't you answer my question? You can easily get a list of all available functions for Highgui in the IDE.imread()function. There is no another function for this.