qt 将图片输出二进制

来源：互联网发布：交通数据开放平台编辑：程序博客网时间：2024/05/16 19:15

#include "mainwindow.h"

#include "ui_mainwindow.h"

#include "qstring.h"

#include "qimage"

#include <qfiledialog.h>

#include <qmessagebox.h>

#include <QDataStream>

MainWindow::MainWindow(QWidget *parent) :

    QMainWindow(parent),

    ui(new Ui::MainWindow)

    ui->setupUi(this);

MainWindow::~MainWindow()

    delete ui;

void MainWindow::on_pushButton_clicked()

    QString filename,filenameout;

    int  Image_Width=ui->label->width();

     int Image_Height=ui->label->height();

     QImage *image ;

      image=new QImage(Image_Width,Image_Height,QImage::Format_RGB32);//设置图片大小和图片类型      //RGB32位

        filename=QFileDialog::getOpenFileName(this,QString::fromLocal8Bit("选择图像"),"",tr("Images (*.png *.bmp *.jpg *.tif *.GIF )"));

        if(!filename.isEmpty())

            if(image->load(filename))//读取图像

                ui->label->setPixmap(QPixmap::fromImage(*image));

            else

                QMessageBox::information(this,QString::fromLocal8Bit("打开图像失败"),QString::fromLocal8Bit("打开图像失败!"));

                //delete image;

                return;

        else

           return;

                int width=image->width();//图像宽

                int height=image->height();//图像高

                int bytePerLine=(width*24+31)/8;//图像每行字节对齐

                unsigned char *data=image->bits();

                char unsigned *graydata;

                    float *red;

                        graydata=new unsigned char[bytePerLine*height];//存储处理后的数据

                        red = new float[width*height];//存储处理后的数据

                unsigned char r,g,b;

                for (int i=0;i<height;i++)

                    for (int j=0;j<width;j++)

                        r = *(data+2);

                        g = *(data+1);

                        b = *data;

                        graydata[i*bytePerLine+j*3]  =(r*30+g*59+b*11)/100;

                        graydata[i*bytePerLine+j*3+1]=(r*30+g*59+b*11)/100;

                        graydata[i*bytePerLine+j*3+2]=(r*30+g*59+b*11)/100;

                        red[i*width+j]=1.0*(r*30+g*59+b*11)/100.0;

                        data+=4;

                filenameout=filename;

                filenameout.append(".dat");

                QMessageBox::information(this,filename,filenameout);

                //filenameout=QFileDialog::getOpenFileName(this,QString::fromLocal8Bit("选择图像"),"",tr("bin (*.bin )"));

                QFile file(filenameout);

               file.open(QIODevice::WriteOnly);

                    QDataStream out(&file);

                    for (int i=0;i<height;i++)

                        for (int j=0;j<width;j++)

                       // float b  = red[i*width+j] ;

                        //file.write(&red[i*width+j], sizeof(float));

                        //file.write((char*)&b, sizeof(b));

                        out<<red[i*width+j];

}}

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