QImage :: pixel和QImage :: setPixel坐标超出范围错误

问题描述 投票:0回答:1

我正在开发图像处理程序,虽然我不断收到这些消息,但下面是一些示例,但是我得到了数百个示例,以至于程序无法完全执行。

QImage::setPixel: coordinate (1043968,0) out of range
QImage::pixel: coordinate (1043968,0) out of range

我看过其他问题,但我似乎找不到代码中的错误,不幸的是,我有大约8个函数,但我认为我将其范围缩小到可能存在问题的一个。该功能是假定要旋转给定图像的功能,我认为这可能是导致错误的原因,基于我已查看的其他问题,但我看不到它。我将不胜感激,我将为您提供任何帮助,或者,如果此功能很好,我又可以如何在不发表8个不同职位的情况下询问其他人,谢谢!

    void makeRotate(QImage originalImage){
QImage inImage = originalImage;    // Copies the original image into a new QImage object.


int width = originalImage.width();
int height = originalImage.height();

//a double for loop

//first loop through the HEIGHT OF inImage  (width of newImage)
for (int i = 0; i < height; i++){
//loop through the WIDTH OF inImage  (height of newImage)
for (int j = 0; j < width; j++){
    //set the pixel
    inImage.setPixel(i , j,(new QColor (getRgbaPixel(i, j, originalImage).red()), (getRgbaPixel(i, j, originalImage).green()), (getRgbaPixel(i, j, originalImage).blue()), 255));
}
}

inImage.save("../Images/rotate.png");

}
c++ qt clion qimage
1个回答
0
投票

如果尝试旋转90度,则为代码

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QFileDialog>
#include <QtDebug>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    fileName = QFileDialog::getOpenFileName(this, tr("Open File"),
                                                    "/home",
                                                    tr("Images (*.png *.xpm *.jpg *.jpeg *.png)"));
    QImage image = QImage(fileName);
    makeRotate(image);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::makeRotate(QImage originalImage)
{
    QImage inImage = originalImage;    // Copies the original image into a new QImage object.


    int width = originalImage.width();
    int height = originalImage.height();

    QTransform rotate;
    rotate.rotate(90);
    inImage = inImage.transformed(rotate);


    //a double for loop

    //first loop through the HEIGHT OF inImage  (width of newImage)
    for (int i = 0; i < width; i++)
    {
        //loop through the WIDTH OF inImage  (height of newImage)
        for (int j = 0; j < height; j++)
        {
            //set the pixel
            QRgb rgb = originalImage.pixel(i, j);
            inImage.setPixel(j, i, (rgb));
        }
    }
    QString str = QFileDialog::getSaveFileName(this, tr("Open File"), fileName);
    inImage.save(str);

    qDebug() << inImage.size();
}

[您需要确保测量值正确,并且如果更改宽度和高度计数器,您的代码可以很好地复制图像(就像我在上面的代码中所做的一样。]

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