opencv – ページ 27 – プログラミング de 落描き

2019年5月31日

Color shadow. openFrameworks

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色付き影

Color shadow.

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#pragma once
#include "ofMain.h"
#include "opencv2/opencv.hpp"

class ofApp : public ofBaseApp {

public:
	void setup();
	void update();
	void draw();

	void keyPressed(int key) {};
	void keyReleased(int key) {};
	void mouseMoved(int x, int y) {};
	void mouseDragged(int x, int y, int button) {};
	void mousePressed(int x, int y, int button) {};
	void mouseReleased(int x, int y, int button) {};
	void windowResized(int w, int h) {};
	void dragEvent(ofDragInfo dragInfo) {};
	void gotMessage(ofMessage msg) {};

	ofFbo fbo;
	ofPixels pixels;
	cv::Mat pixels_mat;
};

#pragma once

#include "ofMain.h"

#include "opencv2/opencv.hpp"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

void mouseMoved(int x, int y) {};

void mouseDragged(int x, int y, int button) {};

void mousePressed(int x, int y, int button) {};

void mouseReleased(int x, int y, int button) {};

void windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

ofFbo fbo;

ofPixels pixels;

cv::Mat pixels_mat;

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {

	ofSetFrameRate(60);
	ofSetWindowTitle("openFrameworks");

	ofBackground(239);
	ofSetLineWidth(3);

	this->fbo.allocate(ofGetWidth() + 25, ofGetHeight() + 25);
	this->fbo.readToPixels(this->pixels);
	// Link pixels And pixels_mat
	this->pixels_mat = cv::Mat(this->pixels.getHeight(), this->pixels.getWidth(), CV_8UC4, this->pixels.getData());
}

//--------------------------------------------------------------
void ofApp::update() {

	ofSeedRandom(19);

	this->fbo.begin();
	ofClear(0);
	ofTranslate(this->fbo.getWidth() * 0.5, this->fbo.getHeight() * 0.5);

	ofColor color;
	for (int i = 0; i < 8; i++) {

		auto len = 20;
		auto radius = ofRandom(50 + i * 30, 80 + i * 25);
		auto deg_start = ofRandom(360) + ofGetFrameNum() * ofRandom(2, 4);
		auto deg_end = deg_start + ofRandom(100, 270);
		vector<glm::vec2> vertices_1, vertices_2;
		for (int deg = deg_start; deg < deg_end; deg++) {

			vertices_1.push_back(glm::vec2((radius - len * 0.5) * cos(deg * DEG_TO_RAD), (radius - len * 0.5) * sin(deg * DEG_TO_RAD)));
			vertices_2.push_back(glm::vec2((radius + len * 0.5) * cos(deg * DEG_TO_RAD), (radius + len * 0.5) * sin(deg * DEG_TO_RAD)));
		}
		reverse(vertices_2.begin(), vertices_2.end());

		color.setHsb(ofRandom(255), 180, 255);
		ofSetColor(color);

		ofBeginShape();
		ofVertices(vertices_1);
		ofVertices(vertices_2);
		ofEndShape(true);
	}

	this->fbo.end();
	// Copy Fbo To pixels
	this->fbo.readToPixels(this->pixels);

	// Blur Process
	cv::GaussianBlur(this->pixels_mat, this->pixels_mat, cv::Size(19, 15), 8, 6);
}

//--------------------------------------------------------------
void ofApp::draw() {

	// Draw Shadow
	ofSetColor(255, 192);
	ofImage draw_image;
	draw_image.setFromPixels(this->pixels);
	draw_image.draw(-5, -5);

	// Draw Fbo Image 
	ofSetColor(255);
	this->fbo.draw(-30, -30);
}

//--------------------------------------------------------------
int main() {

	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

//--------------------------------------------------------------

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetLineWidth(3);

this->fbo.allocate(ofGetWidth() + 25, ofGetHeight() + 25);

this->fbo.readToPixels(this->pixels);

// Link pixels And pixels_mat

this->pixels_mat = cv::Mat(this->pixels.getHeight(), this->pixels.getWidth(), CV_8UC4, this->pixels.getData());

}

//--------------------------------------------------------------

void ofApp::update() {

ofSeedRandom(19);

this->fbo.begin();

ofClear(0);

ofTranslate(this->fbo.getWidth() * 0.5, this->fbo.getHeight() * 0.5);

ofColor color;

for (int i = 0; i < 8; i++) {

auto len = 20;

auto radius = ofRandom(50 + i * 30, 80 + i * 25);

auto deg_start = ofRandom(360) + ofGetFrameNum() * ofRandom(2, 4);

auto deg_end = deg_start + ofRandom(100, 270);

vector<glm::vec2> vertices_1, vertices_2;

for (int deg = deg_start; deg < deg_end; deg++) {

vertices_1.push_back(glm::vec2((radius - len * 0.5) * cos(deg * DEG_TO_RAD), (radius - len * 0.5) * sin(deg * DEG_TO_RAD)));

vertices_2.push_back(glm::vec2((radius + len * 0.5) * cos(deg * DEG_TO_RAD), (radius + len * 0.5) * sin(deg * DEG_TO_RAD)));

}

reverse(vertices_2.begin(), vertices_2.end());

color.setHsb(ofRandom(255), 180, 255);

ofSetColor(color);

ofBeginShape();

ofVertices(vertices_1);

ofVertices(vertices_2);

ofEndShape(true);

}

this->fbo.end();

// Copy Fbo To pixels

this->fbo.readToPixels(this->pixels);

// Blur Process

cv::GaussianBlur(this->pixels_mat, this->pixels_mat, cv::Size(19, 15), 8, 6);

}

//--------------------------------------------------------------

void ofApp::draw() {

// Draw Shadow

ofSetColor(255, 192);

ofImage draw_image;

draw_image.setFromPixels(this->pixels);

draw_image.draw(-5, -5);

// Draw Fbo Image

ofSetColor(255);

this->fbo.draw(-30, -30);

}

//--------------------------------------------------------------

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
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2019年5月23日2019年5月23日

Font mask. openFrameworks

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[ About ]
文字で動画をマスク

Font mask.

[ Source ]

#pragma once
#include "ofMain.h"
#include "opencv2/opencv.hpp"

class ofApp : public ofBaseApp {

public:
	void setup();
	void update();
	void draw();

	void keyPressed(int key) {};
	void keyReleased(int key) {};
	void mouseMoved(int x, int y) {};
	void mouseDragged(int x, int y, int button) {};
	void mousePressed(int x, int y, int button) {};
	void mouseReleased(int x, int y, int button) {};
	void windowResized(int w, int h) {};
	void dragEvent(ofDragInfo dragInfo) {};
	void gotMessage(ofMessage msg) {};

	cv::Size cap_size;
	cv::VideoCapture cap;
	cv::Mat frame;
	ofImage image;

	ofFbo fbo;
	ofShader shader;
	float font_size;
	ofTrueTypeFont font;
};

#pragma once

#include "ofMain.h"

#include "opencv2/opencv.hpp"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

void mouseMoved(int x, int y) {};

void mouseDragged(int x, int y, int button) {};

void mousePressed(int x, int y, int button) {};

void mouseReleased(int x, int y, int button) {};

void windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

cv::Size cap_size;

cv::VideoCapture cap;

cv::Mat frame;

ofImage image;

ofFbo fbo;

ofShader shader;

float font_size;

ofTrueTypeFont font;

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {

	ofSetFrameRate(30);
	ofSetWindowTitle("openFrameworks");

	ofBackground(239);

	this->cap_size = cv::Size(1280, 720);
	this->cap.open("video.mp4");
	this->image.allocate(this->cap_size.width, this->cap_size.height, OF_IMAGE_COLOR);
	this->frame = cv::Mat(cv::Size(this->image.getWidth(), this->image.getHeight()), CV_MAKETYPE(CV_8UC3, this->image.getPixels().getNumChannels()), this->image.getPixels().getData(), 0);

	this->fbo.allocate(ofGetWidth(), ofGetHeight());
	this->shader.load("shader/shader.vert", "shader/shader.frag");
	this->font_size = 80;
	this->font.loadFont("fonts/Kazesawa-Bold.ttf", this->font_size, true, true, true);
}

//--------------------------------------------------------------
void ofApp::update() {

	// Read mp4 file.
	cv::Mat src;
	this->cap >> src;
	if (src.empty()) {

		this->cap.set(CV_CAP_PROP_POS_FRAMES, 1);
		return;
	}
	cv::resize(src, this->frame, this->cap_size);
	cv::cvtColor(this->frame, this->frame, CV_BGR2RGB);
	this->image.update();

	// Draw image.
	this->fbo.begin();
	ofClear(0);
	ofBackground(60);
	ofSetColor(255);

	for (int x = 0; x < ofGetWidth(); x += this->font_size) {

		for (int y = this->font_size; y <= ofGetHeight(); y += this->font_size) {

			char noise_value = ofMap(ofNoise(x * 0.005, y * 0.0005 - ofGetFrameNum() * this->font_size * 0.00001), 0, 1, 'A', 'Z');
			this->font.drawString({ noise_value }, x, y);
		}
	}
	this->fbo.end();
}

//--------------------------------------------------------------
void ofApp::draw() {

	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniformTexture("tex1", this->image, 1);
	this->shader.setUniformTexture("tex2", this->fbo.getTexture(), 2);

	ofFill();
	ofSetColor(255);
	ofDrawRectangle(0, 0, ofGetWidth(), ofGetHeight());
	this->shader.end();
}

//--------------------------------------------------------------
int main() {

	ofGLWindowSettings settings;
	settings.setGLVersion(3, 2);
	settings.setSize(1280, 720);
	ofCreateWindow(settings);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

//--------------------------------------------------------------

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

this->cap_size = cv::Size(1280, 720);

this->cap.open("video.mp4");

this->image.allocate(this->cap_size.width, this->cap_size.height, OF_IMAGE_COLOR);

this->frame = cv::Mat(cv::Size(this->image.getWidth(), this->image.getHeight()), CV_MAKETYPE(CV_8UC3, this->image.getPixels().getNumChannels()), this->image.getPixels().getData(), 0);

this->fbo.allocate(ofGetWidth(), ofGetHeight());

this->shader.load("shader/shader.vert", "shader/shader.frag");

this->font_size = 80;

this->font.loadFont("fonts/Kazesawa-Bold.ttf", this->font_size, true, true, true);

}

//--------------------------------------------------------------

void ofApp::update() {

// Read mp4 file.

cv::Mat src;

this->cap >> src;

if (src.empty()) {

this->cap.set(CV_CAP_PROP_POS_FRAMES, 1);

return;

}

cv::resize(src, this->frame, this->cap_size);

cv::cvtColor(this->frame, this->frame, CV_BGR2RGB);

this->image.update();

// Draw image.

this->fbo.begin();

ofClear(0);

ofBackground(60);

ofSetColor(255);

for (int x = 0; x < ofGetWidth(); x += this->font_size) {

for (int y = this->font_size; y <= ofGetHeight(); y += this->font_size) {

char noise_value = ofMap(ofNoise(x * 0.005, y * 0.0005 - ofGetFrameNum() * this->font_size * 0.00001), 0, 1, 'A', 'Z');

this->font.drawString({ noise_value }, x, y);

}

this->fbo.end();

}

//--------------------------------------------------------------

void ofApp::draw() {

this->shader.begin();

this->shader.setUniform1f("time", ofGetElapsedTimef());

this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());

this->shader.setUniformTexture("tex1", this->image, 1);

this->shader.setUniformTexture("tex2", this->fbo.getTexture(), 2);

ofFill();

ofSetColor(255);

ofDrawRectangle(0, 0, ofGetWidth(), ofGetHeight());

this->shader.end();

}

//--------------------------------------------------------------

int main() {

ofGLWindowSettings settings;

settings.setGLVersion(3, 2);

settings.setSize(1280, 720);

ofCreateWindow(settings);

ofRunApp(new ofApp());

}

#version 150

uniform mat4 modelViewProjectionMatrix;
in vec4 position;

void main(){
	gl_Position = modelViewProjectionMatrix * position;
}

#version 150

uniform mat4 modelViewProjectionMatrix;

in vec4 position;

void main(){

gl_Position = modelViewProjectionMatrix * position;

}

#version 150

uniform float time;
uniform vec2 resolution;
uniform sampler2DRect tex1;
uniform sampler2DRect tex2;

in vec2 texCoordVarying;
out vec4 outputColor;

void main() {

  vec4 t1 = texture(tex1, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));
  vec4 t2 = texture(tex2, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));
 
  outputColor = t1 * t2;
}

#version 150

uniform float time;

uniform vec2 resolution;

uniform sampler2DRect tex1;

uniform sampler2DRect tex2;

in vec2 texCoordVarying;

out vec4 outputColor;

void main() {

vec4 t1 = texture(tex1, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));

vec4 t2 = texture(tex2, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));

outputColor = t1 * t2;

}

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2019年4月8日2019年4月8日

Drop shadow. openFrameworks

[ Video ]

[ About ]
今日はアイデアが降りて来なかったので、過去の投稿を掛け合わせてみました。OpenCVを使って影を作っています

Drop shadow.

[ Source ]

#pragma once
#include "ofMain.h"
#include "opencv2/opencv.hpp"

class ofApp : public ofBaseApp {

public:
	void setup();
	void update();
	void draw();

	void keyPressed(int key) {};
	void keyReleased(int key) {};
	void mouseMoved(int x, int y) {};
	void mouseDragged(int x, int y, int button) {};
	void mousePressed(int x, int y, int button) {};
	void mouseReleased(int x, int y, int button) {};
	void windowResized(int w, int h) {};
	void dragEvent(ofDragInfo dragInfo) {};
	void gotMessage(ofMessage msg) {};

	ofFbo fbo;
	ofPixels pixels;
	cv::Mat pixels_mat;
};

#pragma once

#include "ofMain.h"

#include "opencv2/opencv.hpp"

class ofApp : public ofBaseApp {

public:

void setup();

void update();

void draw();

void keyPressed(int key) {};

void keyReleased(int key) {};

void mouseMoved(int x, int y) {};

void mouseDragged(int x, int y, int button) {};

void mousePressed(int x, int y, int button) {};

void mouseReleased(int x, int y, int button) {};

void windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

ofFbo fbo;

ofPixels pixels;

cv::Mat pixels_mat;

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {

	ofSetFrameRate(60);
	ofSetWindowTitle("openFrameworks");

	ofBackground(239);
	ofSetLineWidth(3);

	this->fbo.allocate(ofGetWidth() + 25, ofGetHeight() + 25);
	this->fbo.readToPixels(this->pixels);
	// Link pixels And pixels_mat
	this->pixels_mat = cv::Mat(this->pixels.getHeight(), this->pixels.getWidth(), CV_8UC4, this->pixels.getData());
}

//--------------------------------------------------------------
void ofApp::update() {

	ofSeedRandom(39);
	ofSetColor(39);

	this->fbo.begin();
	ofClear(0);
	ofTranslate(this->fbo.getWidth() * 0.5, this->fbo.getHeight() * 0.5);

	auto radius_base = 250;
	auto len = 125;
	auto deg_span = 5;
	for (auto deg = 0; deg < 360; deg += deg_span) {

		auto noise_point = glm::vec2(radius_base * cos(deg * DEG_TO_RAD), radius_base * sin(deg * DEG_TO_RAD));
		auto noise_value = ofNoise(noise_point.x * 0.01, noise_point.y * 0.01, ofGetFrameNum() * 0.01);
		auto radius = radius_base;
		if (noise_value > 0.7) { radius += ofMap(noise_value, 0.7, 1.0, 0, radius_base * 0.5); }
		if (noise_value < 0.3) { radius -= ofMap(noise_value, 0.0, 0.3, radius_base * 0.5, 0); }

		ofBeginShape();
		ofVertex(glm::vec2(radius * cos((deg - deg_span * 0.45)  * DEG_TO_RAD), radius * sin((deg - deg_span * 0.45) * DEG_TO_RAD)));
		ofVertex(glm::vec2(radius * cos((deg + deg_span * 0.45)  * DEG_TO_RAD), radius * sin((deg + deg_span * 0.45) * DEG_TO_RAD)));
		ofVertex(glm::vec2((radius - len) * cos((deg + deg_span * 0.45)  * DEG_TO_RAD), (radius - len) * sin((deg + deg_span * 0.45) * DEG_TO_RAD)));
		ofVertex(glm::vec2((radius - len) * cos((deg - deg_span * 0.45)  * DEG_TO_RAD), (radius - len) * sin((deg - deg_span * 0.45) * DEG_TO_RAD)));
		ofEndShape(true);
	}

	this->fbo.end();
	// Copy Fbo To pixels
	this->fbo.readToPixels(this->pixels);

	// Gray
	cv::Mat gray_mat;
	cv::cvtColor(this->pixels_mat, gray_mat, cv::COLOR_RGBA2GRAY);
	for (int y = 0; y < this->pixels_mat.cols; y++) {

		for (int x = 0; x < this->pixels_mat.rows; x++) {

			if (gray_mat.at<unsigned char>(y, x) > 0) {

				this->pixels_mat.at<cv::Vec4b>(y, x) = cv::Vec4b(gray_mat.at<unsigned char>(y, x), gray_mat.at<unsigned char>(y, x), gray_mat.at<unsigned char>(y, x), this->pixels_mat.at<cv::Vec4b>(y, x)[3]);
			}
		}
	}

	// Blur Process
	cv::GaussianBlur(this->pixels_mat, this->pixels_mat, cv::Size(19, 19), 10, 10);
}

//--------------------------------------------------------------
void ofApp::draw() {

	// Draw Shadow
	ofSetColor(255, 192);
	ofImage draw_image;
	draw_image.setFromPixels(this->pixels);
	draw_image.draw(-5, -5);

	// Draw Fbo Image 
	ofSetColor(255);
	this->fbo.draw(-25, -25);
}

//--------------------------------------------------------------
int main() {

	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

//--------------------------------------------------------------

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetLineWidth(3);

this->fbo.allocate(ofGetWidth() + 25, ofGetHeight() + 25);

this->fbo.readToPixels(this->pixels);

// Link pixels And pixels_mat

this->pixels_mat = cv::Mat(this->pixels.getHeight(), this->pixels.getWidth(), CV_8UC4, this->pixels.getData());

}

//--------------------------------------------------------------

void ofApp::update() {

ofSeedRandom(39);

ofSetColor(39);

this->fbo.begin();

ofClear(0);

ofTranslate(this->fbo.getWidth() * 0.5, this->fbo.getHeight() * 0.5);

auto radius_base = 250;

auto len = 125;

auto deg_span = 5;

for (auto deg = 0; deg < 360; deg += deg_span) {

auto noise_point = glm::vec2(radius_base * cos(deg * DEG_TO_RAD), radius_base * sin(deg * DEG_TO_RAD));

auto noise_value = ofNoise(noise_point.x * 0.01, noise_point.y * 0.01, ofGetFrameNum() * 0.01);

auto radius = radius_base;

if (noise_value > 0.7) { radius += ofMap(noise_value, 0.7, 1.0, 0, radius_base * 0.5); }

if (noise_value < 0.3) { radius -= ofMap(noise_value, 0.0, 0.3, radius_base * 0.5, 0); }

ofBeginShape();

ofVertex(glm::vec2(radius * cos((deg - deg_span * 0.45) * DEG_TO_RAD), radius * sin((deg - deg_span * 0.45) * DEG_TO_RAD)));

ofVertex(glm::vec2(radius * cos((deg + deg_span * 0.45) * DEG_TO_RAD), radius * sin((deg + deg_span * 0.45) * DEG_TO_RAD)));

ofVertex(glm::vec2((radius - len) * cos((deg + deg_span * 0.45) * DEG_TO_RAD), (radius - len) * sin((deg + deg_span * 0.45) * DEG_TO_RAD)));

ofVertex(glm::vec2((radius - len) * cos((deg - deg_span * 0.45) * DEG_TO_RAD), (radius - len) * sin((deg - deg_span * 0.45) * DEG_TO_RAD)));

ofEndShape(true);

}

this->fbo.end();

// Copy Fbo To pixels

this->fbo.readToPixels(this->pixels);

// Gray

cv::Mat gray_mat;

cv::cvtColor(this->pixels_mat, gray_mat, cv::COLOR_RGBA2GRAY);

for (int y = 0; y < this->pixels_mat.cols; y++) {

for (int x = 0; x < this->pixels_mat.rows; x++) {

if (gray_mat.at<unsigned char>(y, x) > 0) {

this->pixels_mat.at<cv::Vec4b>(y, x) = cv::Vec4b(gray_mat.at<unsigned char>(y, x), gray_mat.at<unsigned char>(y, x), gray_mat.at<unsigned char>(y, x), this->pixels_mat.at<cv::Vec4b>(y, x)[3]);

}

// Blur Process

cv::GaussianBlur(this->pixels_mat, this->pixels_mat, cv::Size(19, 19), 10, 10);

}

//--------------------------------------------------------------

void ofApp::draw() {

// Draw Shadow

ofSetColor(255, 192);

ofImage draw_image;

draw_image.setFromPixels(this->pixels);

draw_image.draw(-5, -5);

// Draw Fbo Image

ofSetColor(255);

this->fbo.draw(-25, -25);

}

//--------------------------------------------------------------

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

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