如何在OpenCV4Android中创建和显示直方图?
谁能告诉我我做错了什么,或者给我举个例子,说明如何在OpenCV4 Android中从灰度图创建和显示直方图?这是我的密码如何在OpenCV4Android中创建和显示直方图?,android,opencv,histogram,Android,Opencv,Histogram,谁能告诉我我做错了什么,或者给我举个例子,说明如何在OpenCV4 Android中从灰度图创建和显示直方图?这是我的密码 Vector<Mat> bgr_planes = new Vector<Mat>();
Vector<Mat> bgr_planes = new Vector<Mat>();
Core.split(cleanFaceMatGRAY, bgr_planes);
MatOfInt histSize = new MatOfInt(256);
final MatOfFloat histRange = new MatOfFloat(0f, 256f);
boolean accumulate = false;
Mat b_hist = new Mat();
Imgproc.calcHist(bgr_planes, new MatOfInt(0),new Mat(), b_hist, histSize, histRange, accumulate);
显示方法是我自己创建的:
公共类应用工具{
public static Bitmap createBitmapFromMat(Mat mat, Bitmap.Config config) {
Bitmap bmp2 = null;
bmp2 = Bitmap.createBitmap(mat.cols(), mat.rows(), config);
Utils.matToBitmap(mat, bmp2);
return bmp2;
}
这在ivPickedPhoto(…)通道中给了我一个错误:
我想我的问题在于我想显示直方图的方式……首先我无法将其转换为bmp。显示直方图的好方法是什么?您要传递的Mat
对象的类型应该是CV_8UC1、CV_8UC3或CV_8UC4
。的文档并没有真正指定您应该使用哪种类型b_Hist
to be,但由于它正在抱怨Mat
类型:
error: (-215) src.type() == CV_8UC1 || src.type() == CV_8UC3 || src.type() == CV_8UC4
您可能应该将其转换为上述三种格式之一。嘿,您是如何解决这个问题的?
12-10 21:12:59.910: E/AndroidRuntime(10301): Caused by: CvException [org.opencv.core.CvException: /home/reports/ci/slave_desktop/50-SDK/opencv/modules/java/generator/src/cpp/utils.cpp:98: error: (-215) src.type() == CV_8UC1 || src.type() == CV_8UC3 || src.type() == CV_8UC4 in function void Java_org_opencv_android_Utils_nMatToBitmap2(JNIEnv*, jclass, jlong, jobject, jboolean)
error: (-215) src.type() == CV_8UC1 || src.type() == CV_8UC3 || src.type() == CV_8UC4