qimage

I have an unsigned char array that is defined like so: unsigned char **chars = new unsigned char *[H]; for(int i = 0; i < H; i++) { chars[i] = new unsigned char[W*3]; } Where H is the height of the image, and W is the width, and chars is populated in the rest of that function looping over rows x columns of the input image. Chars is populated in the order Red Green Blue I am trying to read it with something like this: QImage *qi = new QImage(imwidth, imheight, QImage::Format_RGB888); for (int i = 0 ; i < imheight ; i++) for (int j = 0 ; j < imwidth ; j++) { //not sure why, but have to flip j

I am looking to display heightmaps from the video game Battlefield 2 as images in my application. I am new to C++ and Qt and it might be straight forward but what I am having trouble with is displaying a grayscale 16-bit 1025x1025 2101250 bytes image. There is no header to the file. I need access to the displayed pixels (does not have to be pixel perfect precision) so I can point to a pixel and get its value. What I have tried I have loaded the binary data into a QByteArray from a QFile and I have attempted to use the QImage::fromData function to make the image but I am making a lot of

I am trying to create an application where I am trying to integrate opencv and qt. I managed successfully to convert a cv::Mat to QImage by using the code below: void MainWindow::loadFile(const QString &fileName) { cv::Mat tmpImage = cv::imread(fileName.toAscii().data()); cv::Mat image; if(!tmpImage.data || tmpImage.empty()) { QMessageBox::warning(this, tr("Error Occured"), tr("Problem loading file"), QMessageBox::Ok); return; } /* Mat to Qimage */ cv::cvtColor(tmpImage, image, CV_BGR2RGB); img = QImage((const unsigned char*)(image.data), image.cols, image.rows, QImage::Format_RGB888);

I am trying to convert python opencv image to QPixmap. I follow the instruction shows Page Link and my code is attached below img = cv2.imread('test.png')[:,:,::1]/255. imgDown = cv2.pyrDown(img) imgDown = np.float32(imgDown) cvRGBImg = cv2.cvtColor(imgDown, cv2.cv.CV_BGR2RGB) qimg = QtGui.QImage(cvRGBImg.data,cvRGBImg.shape[1], cvRGBImg.shape[0], QtGui.QImage.Format_RGB888) pixmap01 = QtGui.QPixmap.fromImage(qimg) self.image01TopTxt = QtGui.QLabel('window',self) self.imageLable01 = QtGui.QLabel(self) self.imageLable01.setPixmap(pixmap01) The code has no compile and runtime error but the

I've very recently picked up Qt and am using it with OpenGL The thing though is that when moving my SDL code to Qt and changing the texture code to use QImage it stops working. The image does load correctly, as shown through the error checking code. Thanks! P.S: Please don't suggest I use glDrawPixels, I need to fix the problem at hand. Some of the reasons for that being 1. slow 2. android (which this code may be running on eventually) is OpenGL ES and does not support glDrawPixels Here's the code: //original image QImage img; if(!img.load(":/star.png")) { //loads correctly qWarning("ERROR