我在 Android 上使用 OpenCV,我想使用 OpenCV 来处理我的自定义相机拍摄的照片,下面是我的代码:
//mOriginBitmap is taken by my custom camera.
mOriginMat = new Mat(mOriginBitmap.getHeight(), mOriginBitmap.getWidth(), CvType.CV_8UC4);
Utils.bitmapToMat(mOriginBitmap,mOriginMat);
mDestMat=new Mat(mOriginBitmap.getHeight(), mOriginBitmap.getWidth(), CvType.CV_8UC4);
Imgproc.GaussianBlur(mOriginMat,mDestMat,new Size(3,3),0);
Utils.matToBitmap(mDestMat,mDestBitmap);
mDestImage.setImageBitmap(mDestBitmap);
提前致谢。
更多细节,下面是异常,由Utils.bitmapToMat(mOriginBitmap,mOriginMat);
抛出:
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1037)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:832)
Caused by: CvException [org.opencv.core.CvException: OpenCV(3.4.4) /build/3_4_pack-android/opencv/modules/java/generator/src/cpp/utils.cpp:38: error: (-215:Assertion failed) AndroidBitmap_lockPixels(env, bitmap, &pixels) >= 0 in function 'void Java_org_opencv_android_Utils_nBitmapToMat2(JNIEnv*, jclass, jobject, jlong, jboolean)'
]
at org.opencv.android.Utils.nBitmapToMat2(Native Method)
at org.opencv.android.Utils.bitmapToMat(Utils.java:93)
at org.opencv.android.Utils.bitmapToMat(Utils.java:102)
at com.example.dell.suppercamera.PictureActivity.onGaussianBlur(PictureActivity.java:103)
最佳答案
我解决了,Android相机拍的图片是YUV420sp,但是Mat需要ARGB888,所以我用Imgcodecs.imread
方法加载图片:
File file = new File(getCacheDir(), "text.jpg");
mOriginMat = Imgcodecs.imread(file.getAbsolutePath());
Imgproc.cvtColor(mOriginMat,mOriginMat,Imgproc.COLOR_BGR2RGB);
mDestMat=new Mat(mOriginMat.rows(), mOriginMat.cols(), CvType.CV_8UC4);
Imgproc.GaussianBlur(mOriginMat,mDestMat,new Size(3,3),0);
mDestBitmap = Bitmap.createBitmap(mOriginMat.cols(), mOriginMat.rows(), Bitmap.Config.ARGB_8888);
Utils.matToBitmap(mDestMat,mDestBitmap);
mDestImage.setImageBitmap(mDestBitmap);
关于android - 如何使用OpenCV处理自定义相机拍摄的照片,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53646735/