我想隐蔽垫为位图使用下面的code：

I'm trying to covert a MAt to a Bitmap use following code :

        Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Mat tmp = new Mat (width,height,CvType.CV_8UC1,new Scalar(4));
    try {
    //Imgproc.cvtColor(seedsImage, tmp, Imgproc.COLOR_RGB2BGRA);
    Imgproc.cvtColor(seedsImage, tmp, Imgproc.COLOR_GRAY2RGBA, 4);
    Utils.matToBitmap(tmp, bmp);}
    catch (CvException e){Log.d("Exception",e.getMessage());}

我seedsImage是垫目标。 而例外，得到的是 10-09 22：15：09.418：D /异常（2461）：.. \ .. \模块\ java的\生成的\ src \ CPP \ utils.cpp：105：错误：（-215）src.dims == 2＆安培;＆安培; info.height ==（uint32_t的）src.rows和放大器;＆安培; info.width ==（uint32_t的）函数src.cols无效Java_org_opencv_android_Utils_nMatToBitmap2（的JNIEnv *，_jclass *，jlong​​，_jobject *，jboolean） 尝试搜索直通，但没有解决我的作品。 可以anynone帮助？

my seedsImage is a Mat object. And the Exception and got is 10-09 22:15:09.418: D/Exception(2461): ..\..\modules\java\generator\src\cpp\utils.cpp:105: error: (-215) src.dims == 2 && info.height == (uint32_t)src.rows && info.width == (uint32_t)src.cols in function void Java_org_opencv_android_Utils_nMatToBitmap2(JNIEnv*, _jclass*, jlong, _jobject*, jboolean) Try to search thru but no solution works for me. Can anynone help?

推荐答案

1）OpenCV的垫构造函数需要＆LT;行，COLS＆GT; 对代替＆LT;宽度，高度和GT; 作为参数。所以，你必须将你的第二行改为

1) OpenCV Mat constructor expects <rows, cols> pair instead of <width, height> as its arguments. So you have to change your second line to

Mat tmp = new Mat (height, width, CvType.CV_8U, new Scalar(4));

2） Imgproc.cvtColor 可以修改 TMP 对象的尺寸。所以它是安全的创建位图的色彩转换后：

2) Imgproc.cvtColor can change the dimensions of the tmp object. So it is safe to create a bitmap after the color conversion:

Bitmap bmp = null;
Mat tmp = new Mat (height, width, CvType.CV_8U, new Scalar(4));
try {
    //Imgproc.cvtColor(seedsImage, tmp, Imgproc.COLOR_RGB2BGRA);
    Imgproc.cvtColor(seedsImage, tmp, Imgproc.COLOR_GRAY2RGBA, 4);
    bmp = Bitmap.createBitmap(tmp.cols(), tmp.rows(), Bitmap.Config.ARGB_8888);
    Utils.matToBitmap(tmp, bmp);
}
catch (CvException e){Log.d("Exception",e.getMessage());}