[QT] Reading, writing, and displaying tiff in QT

Recently, the TIFF format was only available in the project. I checked on the document: "tiff is an image file format. This image format is complex, stores a large amount of content, occupies a large storage space, and is three times the size of GIF images, it is 10 times the corresponding JPEG image ". See its definition: The label Image File Format (Tagged Image File Format, abbreviated as TIFF) is a file format mainly used to store images including photos and art maps.

Label Image File Format

File Extension:. tif,. Tiff developer: Aldus

Format type: Image File Format

The project is based on QT 4.8 and may need to operate images in TIFF format. Therefore, I tested its basic operations-read/write and display. Read/writeThere are multiple methods for reading and writing images in QT. Some code is as follows:

    char *filename = "F:/0.tif";    /*read + write*/    QImage image;    QImageReader qReader(filename);    image = qReader.read();    QImageWriter writer("F:/A.tiff", "tiff");    writer.write(image);    /*load + write*/    QImage image1;    image1.load(filename);    QImageWriter writer1("F:/B.tiff", "tiff");    writer1.write(image1);    /*load + save*/    QImage image2;    image2.load(filename);    image2.save("F:/C.tiff","tiff");    /*write*/    QImage image3 = QImage(filename);    QImageWriter writer3("F:/D.tiff", "tiff");    writer3.write(image3);

Images and truth

The above is the read/write operation of TIFF. Let's take a look at the display of TIFF on qlabel. The display code of TIFF is also very simple.Display

QString filename = "F:/4.tiff";QPixmap qimage(filename);qimage = qimage.scaled(800,800);ui->labelPic->setPixmap(qimage);ui->labelPic->show();

Images and truth

Qt 4.84 supports the following image formats:

bmpgificojpegjpgmngpbmpgmpngppmsvgsvgztgatiftiffxbmxpm

You can use the following code to view

    QList<QByteArray> aa = QImageReader::supportedImageFormats();    foreach (QByteArray a , aa)    {        qDebug(a.data());    }