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Fix C++ QRCode example #526

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Fix C++ QRCode example #526

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976aa02
Reduce opencv libs only to the required one in the QRCode example.
Dec 8, 2020
0d1ce64
Fix drawing lines in result image in QRcode example.
Dec 9, 2020
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2 changes: 1 addition & 1 deletion QRCode-OpenCV/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ PROJECT(opencv_tests)
if(NOT OpenCV_DIR)
set(OpenCV_DIR <specify your path to the opencv installation directory>installations/OpenCV4/lib/cmake/opencv4/)
endif()
find_package( OpenCV REQUIRED )
find_package(OpenCV REQUIRED core highgui objdetect)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED TRUE)
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19 changes: 14 additions & 5 deletions QRCode-OpenCV/qrCodeOpencv.cpp
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Original file line number Diff line number Diff line change
@@ -1,4 +1,3 @@
// #include <opencv2/opencv.hpp>
#include <opencv2/objdetect.hpp>
#include <opencv2/imgcodecs.hpp>
#include <opencv2/highgui/highgui.hpp>
Expand All @@ -10,10 +9,20 @@ using namespace std;

void display(Mat &im, Mat &bbox)
{
int n = bbox.rows;
for(int i = 0 ; i < n ; i++)
{
line(im, Point2i(bbox.at<float>(i,0),bbox.at<float>(i,1)), Point2i(bbox.at<float>((i+1) % n,0), bbox.at<float>((i+1) % n,1)), Scalar(255,0,0), 3);
int index = 0;
int max_index = (bbox.cols*2);
for(int l = 0 ; l < bbox.cols; l++) {
line(
im,
Point(
bbox.at<float>(0, index),
bbox.at<float>(0, index+1)),
Point(
bbox.at<float>(0, (index+2) % max_index),
bbox.at<float>(0, (index+3) % max_index)),
Scalar(0,255,0),
2);
index+=2;
}
imshow("Result", im);
}
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