请编写基于C++和Qt的VS2015项目,实现用pushbutton控制调用opencv实现图片的阈值分割,并在Label中显示出来
时间: 2024-04-15 16:30:19 浏览: 20
以下是一个基于C++和Qt的VS2015项目,使用PushButton控制调用OpenCV实现图片的阈值分割,并在Label中显示出来的示例代码:
```cpp
#include <opencv2/opencv.hpp>
#include <QApplication>
#include <QMainWindow>
#include <QPushButton>
#include <QLabel>
using namespace cv;
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow(QWidget *parent = nullptr)
: QMainWindow(parent)
{
// 创建PushButton
***
相关问题
请编写一段基于C++的VS2015程序,实现用pushbutton控制调用opencv实现图片的阈值分割,并在Label中显示出来
以下是一个基于C++的VS2015程序,使用PushButton控制调用OpenCV实现图片的阈值分割,并在Label中显示出来的示例代码:
```cpp
#include <opencv2/opencv.hpp>
#include <Windows.h>
#include <Commctrl.h>
using namespace cv;
HWND g_hButton;
HWND g_hLabel;
HINSTANCE g_hInstance;
// 回调函数,用于处理按钮点击事件
LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch (msg)
{
case WM_CREATE:
// 创建PushButton
g_hButton = CreateWindow("BUTTON", "Threshold", WS_VISIBLE | WS_CHILD | BS_PUSHBUTTON,
10, 10, 100, 30, hWnd, NULL, g_hInstance, NULL);
// 创建Label
g_hLabel = CreateWindow("STATIC", NULL, WS_VISIBLE | WS_CHILD | SS_BITMAP,
10, 50, 640, 480, hWnd, NULL, g_hInstance, NULL);
break;
case WM_COMMAND:
if (lParam == (LPARAM)g_hButton)
{
// 读取图片
Mat image = imread("path_to_image.jpg", IMREAD_GRAYSCALE);
// 进行阈值分割
Mat thresholded;
threshold(image, thresholded, 128, 255, THRESH_BINARY);
// 在Label中显示分割结果
HBITMAP hBitmap = CreateBitmap(thresholded.cols, thresholded.rows, 1, 8, thresholded.data);
SendMessage(g_hLabel, STM_SETIMAGE, IMAGE_BITMAP, (LPARAM)hBitmap);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, msg, wParam, lParam);
}
return 0;
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
g_hInstance = hInstance;
// 注册窗口类
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = "ThresholdApp";
wcex.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
if (!RegisterClassEx(&wcex))
{
MessageBox(NULL, "Window Registration Failed!", "Error", MB_ICONEXCLAMATION | MB_OK);
return 0;
}
// 创建窗口
HWND hWnd = CreateWindowEx(0, "ThresholdApp", "Threshold Application", WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, 680, 600, NULL, NULL, hInstance, NULL);
if (hWnd == NULL)
{
MessageBox(NULL, "Window Creation Failed!", "Error", MB_ICONEXCLAMATION | MB_OK);
return 0;
}
// 显示窗口
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
// 消息循环
MSG msg;
while (GetMessage(&msg, NULL, 0, 0) > 0)
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return (int)msg.wParam;
}
```
请将代码中的`"path_to_image.jpg"`替换为实际的图片路径。该程序会创建一个窗口,其中包含一个名为"Threshold"的PushButton和一个用于显示分割结果的Label。点击按钮后,会读取图片并进行阈值分割,然后在Label中显示分割结果。
python 基于opencv写一个项目代码,实现调用调用“ks.ui",实现当点击Puthbutton_2时,选择打开图像文件,显示在label_2中
首先需要安装OpenCV库,可以使用以下命令在终端中安装:
```
pip install opencv-python
```
然后可以使用以下代码实现上述需求:
```python
import cv2
from PyQt5 import QtWidgets, QtGui
from PyQt5.QtWidgets import QFileDialog
class MyWindow(QtWidgets.QWidget):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
self.setWindowTitle('OpenCV with PyQt5')
self.setGeometry(100, 100, 800, 600)
self.label1 = QtWidgets.QLabel(self)
self.label1.setText('OpenCV with PyQt5')
self.label1.move(330, 20)
self.pushButton1 = QtWidgets.QPushButton('Exit', self)
self.pushButton1.setGeometry(700, 550, 80, 30)
self.pushButton1.clicked.connect(self.close)
self.pushButton2 = QtWidgets.QPushButton('Open Image', self)
self.pushButton2.setGeometry(20, 550, 120, 30)
self.pushButton2.clicked.connect(self.openImage)
self.label2 = QtWidgets.QLabel(self)
self.label2.setGeometry(180, 60, 600, 480)
self.show()
def openImage(self):
fileName, _ = QFileDialog.getOpenFileName(self, 'Open Image', '', 'Image files (*.jpg *.jpeg *.png *.gif)')
if fileName:
image = cv2.imread(fileName)
image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
height, width, channel = image.shape
bytesPerLine = 3 * width
qImg = QtGui.QImage(image.data, width, height, bytesPerLine, QtGui.QImage.Format_RGB888)
pixmap = QtGui.QPixmap.fromImage(qImg)
self.label2.setPixmap(pixmap)
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
window = MyWindow()
sys.exit(app.exec_())
```
在这个代码中,我们使用了PyQt5库来创建GUI,使用OpenCV库来读取和显示图像文件。当点击“Open Image”按钮时,会弹出一个文件选择框,用户可以选择要打开的图像文件。然后我们使用OpenCV读取该图像文件,并将其转换为QPixmap格式,最后显示在GUI中的label2上。
注意,本例中的图像是以RGB格式读取的,所以需要使用cv2.cvtColor函数将其转换为RGB格式,如果读取的图像是灰度或其他格式,则不需要进行此转换。