Design patterns 網站教學

 http://sourcemaking.com/design_patterns

看起來很不錯，還有code可以參考

不過最近應該是沒時間看了XD

Show OpenCV Image on QLabel( QImage )

First Part - Convert a OpenCV image to A QImage

by qt-opencv-multithreaded project

• first glance at...
• http://stackoverflow.com/questions/11543298/qt-opencv-displaying-images-on-qlabel
• A simple multithreaded OpenCV example application using the Qt framework.
• LINK: https://code.google.com/p/qt-opencv-multithreaded/
• The following files are helpful: 
• FrameLabel.h FrameLabel.cpp MatToQImage.h MatToQImage.cpp

/************************************************************************/ /* qt-opencv-multithreaded: */ /* A multithreaded OpenCV application using the Qt framework. */ /* */ /* MatToQImage.cpp */ /* */ /* Nick D'Ademo <nickdademo@gmail.com> */ /* */ /* Copyright (c) 2012 Nick D'Ademo */ /* */ /* Permission is hereby granted, free of charge, to any person */ /* obtaining a copy of this software and associated documentation */ /* files (the "Software"), to deal in the Software without restriction, */ /* including without limitation the rights to use, copy, modify, merge, */ /* publish, distribute, sublicense, and/or sell copies of the Software, */ /* and to permit persons to whom the Software is furnished to do so, */ /* subject to the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND */ /* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS */ /* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN */ /* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN */ /* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE */ /* SOFTWARE. */ /* */ /************************************************************************/ #include "MatToQImage.h" QImage MatToQImage(const Mat& mat) { // 8-bits unsigned, NO. OF CHANNELS=1 if(mat.type()==CV_8UC1) { // Set the color table (used to translate colour indexes to qRgb values) QVector<QRgb> colorTable; for (int i=0; i<256; i++) colorTable.push_back(qRgb(i,i,i)); // Copy input Mat const uchar *qImageBuffer = (const uchar*)mat.data; // Create QImage with same dimensions as input Mat QImage img(qImageBuffer, mat.cols, mat.rows, mat.step, QImage::Format_Indexed8); img.setColorTable(colorTable); return img; } // 8-bits unsigned, NO. OF CHANNELS=3 if(mat.type()==CV_8UC3) { // Copy input Mat const uchar *qImageBuffer = (const uchar*)mat.data; // Create QImage with same dimensions as input Mat QImage img(qImageBuffer, mat.cols, mat.rows, mat.step, QImage::Format_RGB888); return img.rgbSwapped(); } else { qDebug() << "ERROR: Mat could not be converted to QImage."; return QImage(); } } // MatToQImage()

Second Part - Show on QLabel

How to show a QImage on a QLabel ? 

　　http://www.qtcentre.org/threads/16160-display-QImage-on-QLabel

1. QImage image(320, 240, QImage::Format_Indexed8);
2. image.setColorTable(colors);
3. image.fill(2);
4. QLabel label;
5. label.setPixmap(QPixmap::fromImage(image));
6. label.show();