mat

问题 I've been trying to convert an array [R,G,B,..] in Mat object with opencv. But is returning wrong data, someone knows why? double data[12] = {0,0,255,0,0,255,0,0,255,0,0,255}; Mat src = Mat(2,2, CV_16UC3, data); and returns: M = [0, 0, 0, 0, 0, 0; 0, 0, 0, 0, 57344, 16495] EDIT: Solved! use uchar instead double, and CV_8UC3 回答1: i think, you wanted: uchar data[12] = {0,0,255,0,0,255,0,0,255,0,0,255}; Mat src = Mat(2,2, CV_8UC3, data); (all red, 2x2 rbg image) 来源： https://stackoverflow.com

问题 I've been trying to convert an array [R,G,B,..] in Mat object with opencv. But is returning wrong data, someone knows why? double data[12] = {0,0,255,0,0,255,0,0,255,0,0,255}; Mat src = Mat(2,2, CV_16UC3, data); and returns: M = [0, 0, 0, 0, 0, 0; 0, 0, 0, 0, 57344, 16495] EDIT: Solved! use uchar instead double, and CV_8UC3 回答1: i think, you wanted: uchar data[12] = {0,0,255,0,0,255,0,0,255,0,0,255}; Mat src = Mat(2,2, CV_8UC3, data); (all red, 2x2 rbg image) 来源： https://stackoverflow.com

问题 I've been trying to convert an array [R,G,B,..] in Mat object with opencv. But is returning wrong data, someone knows why? double data[12] = {0,0,255,0,0,255,0,0,255,0,0,255}; Mat src = Mat(2,2, CV_16UC3, data); and returns: M = [0, 0, 0, 0, 0, 0; 0, 0, 0, 0, 57344, 16495] EDIT: Solved! use uchar instead double, and CV_8UC3 回答1: i think, you wanted: uchar data[12] = {0,0,255,0,0,255,0,0,255,0,0,255}; Mat src = Mat(2,2, CV_8UC3, data); (all red, 2x2 rbg image) 来源： https://stackoverflow.com

问题 I would like to display Mat objects from OpenCV directly with JavaFX. I have seen that it is possible to convert a Mat object into a BufferedImage . But as far as I know you can't display a BufferedImage with JavaFX, so another conversion would have to take place. Is there a way to directly convert it into a data structure that is displayable by JavaFX? 回答1: I have found a direct way to convert a Mat object to a JavaFX Image object. MatOfByte byteMat = new MatOfByte(); Highgui.imencode(".bmp"

问题 I would like to display Mat objects from OpenCV directly with JavaFX. I have seen that it is possible to convert a Mat object into a BufferedImage . But as far as I know you can't display a BufferedImage with JavaFX, so another conversion would have to take place. Is there a way to directly convert it into a data structure that is displayable by JavaFX? 回答1: I have found a direct way to convert a Mat object to a JavaFX Image object. MatOfByte byteMat = new MatOfByte(); Highgui.imencode(".bmp"

问题 I would like to display Mat objects from OpenCV directly with JavaFX. I have seen that it is possible to convert a Mat object into a BufferedImage . But as far as I know you can't display a BufferedImage with JavaFX, so another conversion would have to take place. Is there a way to directly convert it into a data structure that is displayable by JavaFX? 回答1: I have found a direct way to convert a Mat object to a JavaFX Image object. MatOfByte byteMat = new MatOfByte(); Highgui.imencode(".bmp"

问题 I would like to display Mat objects from OpenCV directly with JavaFX. I have seen that it is possible to convert a Mat object into a BufferedImage . But as far as I know you can't display a BufferedImage with JavaFX, so another conversion would have to take place. Is there a way to directly convert it into a data structure that is displayable by JavaFX? 回答1: I have found a direct way to convert a Mat object to a JavaFX Image object. MatOfByte byteMat = new MatOfByte(); Highgui.imencode(".bmp"

问题 I have to use mat.h for open a .mat file in my C++ code. My code is that: #include "mat.h" using namespace std; int main() { MATFile *pmat; pmat = matOpen("ns3Da.mat","r"); return 0; } The command I use to compile is that: g++ program.cpp -I/usr/local/MATLAB/R2012a/extern/include -L/usr/local/MATLAB/R2012a/bin/* -L/usr/local/MATLAB/R2012a/extern/lib -o program The error I obtain is that: /tmp/ccSWqTnb.o: In function 'main': programma_c.cpp:(.text+0x13): undefined reference to 'matOpen'

问题 I managed to open the Android camera using opencv. but when i use the code that fixes the camera orientation -"see the code mentioned below in the onCameraFrame(..) method"- the App crashes after few seconds and the logcat generates the belwo posted messages in the "logcat section". To solve this issue: i tried to use SystemClock.sleep to force the App to dely for a while but this was not a good solution because it delays the camera preview i tried to minimize the frame size as much as i can,

问题 my problem is similar to this one but it is rather old and I cannot comment or upvote due to my (beginners) reputation. I am trying to compile the matcreat.cpp file from Matlab 2017b like this (using g++ (x86_64-posix-seh-rev0, Built by MinGW-W64 project) 8.1.0): g++ -c -o matcreat.o -I"C:\Program Files\MATLAB\R2017b\extern\include" matcreat.cpp g++ -o matcreat.exe matcreat.o -L"C:\Program Files\MATLAB\R2017b\extern\lib\win64\mingw64" -llibmat -llibmex -llibmx -llibeng The program has a main