Qt+OpenCV制作实用的棋盘格生成小工具

棋盘格应用非常广泛，可以用在需要标定的任何场景，而且有着不俗的精度。但是鉴于有些人对matlab、opencv不是很熟悉，因此制作棋盘格往往会耗费新手很多时间。本文就是帮助新手制作棋盘格的教程，可以直接在下面链接下载该程序（包含exe和源码）：

https://download.csdn.net/download/u012283902/10854231

（注意：exe运行需要安装vs2017的运行库）

1.  编程环境：

         QT5.11.2+VS2017+OpenCV4.0

2. 界面设计，如图所示

           

 

3. 主要代码：

（1）create_checkboard.h

#pragma once

#include 
#include "ui_create_checkboard.h"

class create_checkboard : public QMainWindow
{
	Q_OBJECT

public:
	create_checkboard(QWidget *parent = Q_NULLPTR);

private slots:
	void setPathBtn();
	void generateBtn();

private:
	Ui::create_checkboardClass ui;
	QString directory;
};

（2）create_checkboard.cpp

#pragma execution_character_set("utf-8")
#include "create_checkboard.h"
#include 
#include 
#include 

create_checkboard::create_checkboard(QWidget *parent)
	: QMainWindow(parent)
{
	ui.setupUi(this);
	
	
	QDir dir;
	directory = dir.currentPath();
	ui.pathLabel->setText(directory);

	// 连接信号槽
	connect(ui.setPathBtn, SIGNAL(clicked()), this, SLOT(setPathBtn()));
	connect(ui.generateBtn, SIGNAL(clicked()), this, SLOT(generateBtn()));
	connect(ui.quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
}

void create_checkboard::setPathBtn()
{
	QFileDialog::Options options;
	options |= QFileDialog::DontResolveSymlinks | QFileDialog::ShowDirsOnly;
	QString dir = QFileDialog::getExistingDirectory(this,
		tr("获得保存图像的路径"),
		"./",
		options);
	if (!dir.isEmpty())
	{
		directory = dir;
		ui.pathLabel->setText(directory);
	}

}

void create_checkboard::generateBtn()
{
	if (directory.isEmpty())
	{
		// 需要设置保存路径
		QMessageBox::question(NULL, "注意", "请设置保存路径", QMessageBox::Yes, QMessageBox::Yes);
		return;
	}

	int width = ui.widthSpin->value();
	int height = ui.heightSpin->value();
	int pixSize = ui.pixSizeSpin->value();

	if (width < 2 || height < 2 || pixSize == 0)
	{
		QMessageBox::question(NULL, "注意", "请重新设置参数", QMessageBox::Yes, QMessageBox::Yes);
		return;
	}

	// 图像大小，并初始化图片大小
	int imageWidth = (width + 1)*pixSize;
	int imageHeight = (height + 1)*pixSize;
	cv::Mat image(cv::Size(imageWidth, imageHeight), CV_8UC1);

	int grayRowValue = 0;
	int grayColValue = 0;
	// 左上角为黑色棋盘格，相邻为白色，黑白间隔排列，以此类推
	for (int i = 0; i < height +1; i++)
	{
		for (int j = 0; j < width +1; j++)
		{
			for (int singleBoardHeight = 0; singleBoardHeight < pixSize; singleBoardHeight++)
			{
				for (int singleBoardWidth = 0; singleBoardWidth < pixSize; singleBoardWidth++)
				{
					int w = i * pixSize + singleBoardWidth;
					int h = j * pixSize + singleBoardHeight;
					image.at(w,h) = grayRowValue;
				}
			}
			grayRowValue == 0 ? grayRowValue = 255 : grayRowValue = 0;
		}
		grayColValue == 0 ? grayColValue = 255 : grayColValue = 0;
		grayRowValue = grayColValue;
	}

	// 生成保存的名称
	QString fileName = directory+"/"+QString::number(width) + "-" + QString::number(height) + "-" + QString::number(pixSize)+".jpg";
	std::string std_filename = (const char *)fileName.toLocal8Bit();
	cv::imwrite(std_filename,image);
	QMessageBox::about(NULL, "提醒", fileName+" 保存完成!");
}

 

3. 运行结果（以4*6，100像素为例）