c++ - Suitable QImage format

Question

I'm having a one Channel image, and want to display it in a QImage

IplImage *img=cvCreateImage(cvSize(640, 480), IPL_DEPTH_8U, 1);

Knowing that When converting from an IplImage* to QImage, I did what is follow:

uchar* img_d=(uchar*) img->imageData;
    QImage img_direction((uchar*)img_d, img->width, img->height, QImage::Format_Mono);

I'm not pretty sure about the Mono format that I have set, even the displayed QImage would be scrambled!

What would be the suitable QImage format for the case of a B&W image?

Answer 1

Qt 的 Mono 格式是每像素 1 位。

唯一的 8 位格式是QImage::Format_Indexed8，因此您需要创建一个具有 256 个灰度的颜色表并将其传递给QImage::setColorTable。

该表可以这样填充：

QVector<QRgb> colorTable;
for(int i=0; i<256; ++i)
   colorTable << qRgb(i,i,i);