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karlphillipkarlphillip
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Added qtSmoothColorTransition to the project.
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7 files changed

+236
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‎cvQTcameraGL/cvQTcameraGL.pro

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@@ -27,15 +27,22 @@ unix:!mac {
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-lopencv_imgproc
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}
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## OpenCV settings for Mac OS X
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## OpenCV settings for Mac OS X with OpenCV 3.1
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macx {
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message("* Using settings for Mac OS X.")
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INCLUDEPATH += /usr/local/include/opencv
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LIBS += -L/usr/local/lib/ \
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# Solve imwrite() undefined symbol
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QMAKE_CXXFLAGS += -stdlib=libc++
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INCLUDEPATH += "/usr/local/opt/opencv3/include"
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LIBS += -L"/usr/local/opt/opencv3/lib" \
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-lopencv_core \
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-lopencv_highgui \
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-lopencv_imgproc
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-lopencv_imgproc \
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-lopencv_imgcodecs \
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-lopencv_videoio \
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-lc++
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}
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## OpenCV settings for Windows and OpenCV 2.4.2

‎cvQTcameraGL/widget.cpp

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* https://creativecommons.org/licenses/by-sa/2.5/
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*/
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#include "widget.h"
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#include <GL/GLU.h>
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#ifndef __APPLE__
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#include <GL/GLU.h>
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#else
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#include <glu.h>
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#endif
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#include <iostream>
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#include <QKeyEvent>
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#include <QTimer>

‎cvQTcameraGL/widget.h

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* https://creativecommons.org/licenses/by-sa/2.5/
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*/
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#pragma once
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#include <cv.h>
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#include <highgui.h>
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#include <opencv2/opencv.hpp>
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#include <QGLWidget>
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#include <QImage>
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‎qtSmoothColorTransition/.gitignore

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# This file is used to ignore files which are generated
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# ----------------------------------------------------------------------------
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*~
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*.autosave
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*.a
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*.core
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*.moc
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*.o
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*.obj
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*.orig
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*.rej
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*.so
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*.so.*
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*_pch.h.cpp
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*_resource.rc
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*.qm
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.#*
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*.*#
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core
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!core/
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tags
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.DS_Store
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*.debug
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Makefile*
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*.prl
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*.app
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moc_*.cpp
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ui_*.h
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qrc_*.cpp
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Thumbs.db
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*.res
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*.rc
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/.qmake.cache
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/.qmake.stash
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# qtcreator generated files
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*.pro.user*
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# xemacs temporary files
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*.flc
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# Vim temporary files
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.*.swp
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# Visual Studio generated files
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*.ib_pdb_index
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*.idb
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*.ilk
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*.pdb
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*.sln
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*.suo
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*.vcproj
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*vcproj.*.*.user
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*.ncb
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*.sdf
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*.opensdf
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*.vcxproj
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*vcxproj.*
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# MinGW generated files
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*.Debug
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*.Release
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# Python byte code
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*.pyc
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# Binaries
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# --------
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*.dll
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*.exe
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‎qtSmoothColorTransition/heightmap.jpg

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‎qtSmoothColorTransition/main.cpp

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#include <iostream>
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#include <QApplication>
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#include <QImage>
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#include <QLabel>
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// http://stackoverflow.com/a/25878225/176769
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// http://mycodelog.com/2010/05/16/interpolation/
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#if 0
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QImage smooth_color_transition(const QImage& input, const QVector<QColor>& color_vec)
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{
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QImage output(input.size(), input.format());
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QColor color_src = color_vec.at(0);
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unsigned int r1 = color_src.red();
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unsigned int g1 = color_src.green();
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unsigned int b1 = color_src.blue();
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QColor color_dst = color_vec.at(1);
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unsigned int r2 = color_dst.red();
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unsigned int g2 = color_dst.green();
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unsigned int b2 = color_dst.blue();
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for (int x = 0; x < input.width(); x++)
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{
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for (int y = 0; y < input.height(); y++)
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{
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QRgb pixel = input.pixel(x, y);
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int gray = (qRed(pixel) + qGreen(pixel) + qBlue(pixel)) / 3;
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float p = gray / 255.0;
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//Resultant Color = RGB(A*(1-P)+X*P, B*(1-P)+Y*P, C*(1-P)+Z*P)
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int r = (int) r1 * (1-p) + r2 * p;
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int g = (int) g1 * (1-p) + g2 * p;
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int b = (int) b1 * (1-p) + b2 * p;
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output.setPixel(x, y, qRgb(r, g, b));
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}
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}
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return output;
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}
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#endif
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QImage smooth_color_transition(const QImage& input, const QVector<QColor>& color_vec)
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{
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if (color_vec.size() < 2)
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return QImage();
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QImage output(input.size(), input.format());
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int num_colors = color_vec.size();
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std::cout << "Num colors:" << color_vec.size() << std::endl;
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int color_width = 256 / (color_vec.size()-1);
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std::cout << "Color width:" << color_width << std::endl;
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QVector<QColor> pallete;
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for (int c = 1; c < num_colors; c++)
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{
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QColor color_src = color_vec.at(c-1);
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unsigned int r1 = color_src.red();
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unsigned int g1 = color_src.green();
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unsigned int b1 = color_src.blue();
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QColor color_dst = color_vec.at(c);
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unsigned int r2 = color_dst.red();
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unsigned int g2 = color_dst.green();
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unsigned int b2 = color_dst.blue();
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for (int i = 0; i < color_width; i++)
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{
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float p = i / (float)color_width; // percentage
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//Resultant Color = RGB(A*(1-P)+X*P, B*(1-P)+Y*P, C*(1-P)+Z*P)
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int r = (int) r1 * (1-p) + r2 * p;
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int g = (int) g1 * (1-p) + g2 * p;
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int b = (int) b1 * (1-p) + b2 * p;
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pallete.push_back(qRgb(r, g, b));
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}
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}
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// Color width is a REAL number, therefore pallete might end up a little bit short
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for (int i = pallete.size(); i < 256; i++)
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pallete.push_back(color_vec[color_vec.size()-1].rgb());
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std::cout << "Pallete size:" << pallete.size() << std::endl;
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for (int x = 0; x < input.width(); x++)
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{
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for (int y = 0; y < input.height(); y++)
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{
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QRgb pixel = input.pixel(x, y);
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int gray = (qRed(pixel) + qGreen(pixel) + qBlue(pixel)) / 3;
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output.setPixel(x, y, pallete[gray].rgb());
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}
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}
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return output;
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}
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int main(int argc, char* argv[])
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{
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QApplication app(argc, argv);
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QImage input("/Users/karlphillip/workspace/GraphicsProgramming/qtSmoothColorTransition/heightmap.jpg");
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if (input.isNull())
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return -1;
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QLabel input_label;
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input_label.setPixmap(QPixmap::fromImage(input));
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input_label.resize(input.width(), input.height());
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input_label.show();
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QVector<QColor> colors;
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colors.push_back(QColor(0, 120, 200)); // dark blue
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colors.push_back(QColor(120, 220, 255)); // cyan
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colors.push_back(QColor(71, 141, 104)); // dark green
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colors.push_back(QColor(106, 168, 107)); // medium green
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colors.push_back(QColor(141, 173, 132)); // light green
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colors.push_back(QColor(166, 191, 151)); // super light green
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colors.push_back(QColor(217, 233, 188)); // sand yellow
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colors.push_back(QColor(185, 140, 90)); // light orange
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colors.push_back(QColor(162, 90, 34)); // light red
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colors.push_back(QColor(144, 61, 45)); // dark red
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colors.push_back(QColor(151, 68, 64)); // super dark red
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colors.push_back(QColor(156, 146, 170)); // purple-red
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colors.push_back(QColor(170, 170, 210)); // purple-white
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colors.push_back(QColor(240, 247, 243)); // white
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QImage output = smooth_color_transition(input, colors);
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QLabel output_label;
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output_label.setPixmap(QPixmap::fromImage(output));
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output_label.resize(output.width(), output.height());
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output_label.show();
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output.save("colored.jpg");
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return app.exec();
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}

‎qtSmoothColorTransition/qtSmoothColorTransition.pro

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QT += widgets
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SOURCES += \
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main.cpp

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