opencv – ページ 31 – プログラミング de 落描き

2018年9月4日2018年9月4日

Face detection and image rotation. openFrameworks

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OpenCVで動画から顔を識別、テキスチャと顔の座標・サイズをシェーダに送信して加工

Face detection by OpenCV. Send texture and face coordinate / size to shader for processing.

[ 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 mouseEntered(int x, int y) {};
	void mouseExited(int x, int y) {};
	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;

	cv::CascadeClassifier face_cascade;

	int number_of_targets;
	vector<glm::vec4> targets;
	vector<glm::vec4> sizes;

	ofShader shader;
};

#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 mouseEntered(int x, int y) {};

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

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;

cv::CascadeClassifier face_cascade;

int number_of_targets;

vector<glm::vec4> targets;

vector<glm::vec4> sizes;

ofShader shader;

};

#include "ofApp.h"

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

	ofSetFrameRate(60);
	ofSetWindowTitle("openframeworks");

	this->cap.open("video.mp4");
	this->cap_size = cv::Size(1280, 720);

	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->number_of_targets = 2;
	for (int i = 0; i < this->number_of_targets; i++) {

		this->targets.push_back(glm::vec4(0.f, 0.f, 0.f, 0.f));
		this->sizes.push_back(glm::vec4(0.f, 0.f, 0.f, 0.f));
	}

	this->face_cascade.load("opencv-3.4.1\\build\\install\\etc\\haarcascades\\haarcascade_frontalface_alt2.xml");
	this->shader.load("shader/shader.vert", "shader/shader.frag");
}
//--------------------------------------------------------------
void ofApp::update() {

	for (int i = 0; i < this->number_of_targets; i++) {

		this->targets[i] = glm::vec4(0.f, 0.f, 0.f, 0.f);
		this->sizes[i] = glm::vec4(0.f, 0.f, 0.f, 0.f);
	}

	cv::Mat src;
	this->cap >> src;
	if (src.empty()) {

		this->cap.set(CV_CAP_PROP_POS_FRAMES, 1);
		return;
	}
	else {

		cv::resize(src, this->frame, this->cap_size);
		cv::cvtColor(this->frame, this->frame, CV_BGR2RGB);
		this->image.update();
	}

	cv::Mat gray_frame, small_frame;
	cv::cvtColor(this->frame, gray_frame, CV_RGB2GRAY);
	cv::resize(gray_frame, small_frame, cv::Size(this->cap_size.width * 0.5, this->cap_size.height * 0.5));

	vector<cv::Rect> faces;
	this->face_cascade.detectMultiScale(small_frame, faces);

	int face_count = 0;
	for (cv::Rect r : faces) {

		this->targets[face_count] = glm::vec4(r.x * 2.f + r.width, r.y * 2.f + r.height, 0.f, 0.f);
		float value = r.width < r.height ? r.width : r.height;
		this->sizes[face_count] = glm::vec4(value, value, 0.f, 0.f);
		face_count++;

		if (face_count >= this->number_of_targets) {

			break;
		}
	}
}

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

	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniformTexture("tex", this->image, 1);
	this->shader.setUniform4fv("targets", &this->targets[0].x, this->number_of_targets);
	this->shader.setUniform4fv("sizes", &this->sizes[0].x, this->number_of_targets);

	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(60);

ofSetWindowTitle("openframeworks");

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

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

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->number_of_targets = 2;

for (int i = 0; i < this->number_of_targets; i++) {

this->targets.push_back(glm::vec4(0.f, 0.f, 0.f, 0.f));

this->sizes.push_back(glm::vec4(0.f, 0.f, 0.f, 0.f));

}

this->face_cascade.load("opencv-3.4.1\\build\\install\\etc\\haarcascades\\haarcascade_frontalface_alt2.xml");

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

}

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

void ofApp::update() {

for (int i = 0; i < this->number_of_targets; i++) {

this->targets[i] = glm::vec4(0.f, 0.f, 0.f, 0.f);

this->sizes[i] = glm::vec4(0.f, 0.f, 0.f, 0.f);

}

cv::Mat src;

this->cap >> src;

if (src.empty()) {

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

return;

}

else {

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

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

this->image.update();

}

cv::Mat gray_frame, small_frame;

cv::cvtColor(this->frame, gray_frame, CV_RGB2GRAY);

cv::resize(gray_frame, small_frame, cv::Size(this->cap_size.width * 0.5, this->cap_size.height * 0.5));

vector<cv::Rect> faces;

this->face_cascade.detectMultiScale(small_frame, faces);

int face_count = 0;

for (cv::Rect r : faces) {

this->targets[face_count] = glm::vec4(r.x * 2.f + r.width, r.y * 2.f + r.height, 0.f, 0.f);

float value = r.width < r.height ? r.width : r.height;

this->sizes[face_count] = glm::vec4(value, value, 0.f, 0.f);

face_count++;

if (face_count >= this->number_of_targets) {

break;

}

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

void ofApp::draw() {

this->shader.begin();

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

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

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

this->shader.setUniform4fv("targets", &this->targets[0].x, this->number_of_targets);

this->shader.setUniform4fv("sizes", &this->sizes[0].x, this->number_of_targets);

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;
in vec2 texcoord;
out vec2 texCoordVarying;

void main(){

	texCoordVarying = texcoord;
	gl_Position = modelViewProjectionMatrix * position;
}

#version 150

uniform mat4 modelViewProjectionMatrix;

in vec4 position;

in vec2 texcoord;

out vec2 texCoordVarying;

void main(){

texCoordVarying = texcoord;

gl_Position = modelViewProjectionMatrix * position;

}

#version 150

const int number_of_targets = 2;

uniform float time;
uniform vec2 resolution;
uniform sampler2DRect tex;
uniform vec4 targets[number_of_targets];
uniform vec4 sizes[number_of_targets];

in vec2 texCoordVarying;
out vec4 outputColor;

void main() {

  vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y);

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

    vec2 t = vec2(targets[i].x, -targets[i].y) / min(resolution.x, resolution.y) * 2.0;
    t.xy += vec2(-resolution.x, resolution.y) / min(resolution.x, resolution.y);

    vec2 sz = vec2(sizes[i].x, -sizes[i].y) / min(resolution.x, resolution.y) * 2.0;

    vec2 q = p - t;
    float d = length(q);
    if(d < length(sz)){

      float a = atan(q.y, q.x);
      float x = t.x + cos(a + time * 5 + floor(d * 10) * 0.5) * d;
      float y = t.y + sin(a + time * 5 + floor(d * 10) * 0.5) * d;
      p = vec2(x, y);
    }
  }

  vec4 color = texture(tex, vec2((p.x * min(resolution.x, resolution.y) + resolution.x) * 0.5, resolution.y - (p.y * min(resolution.x, resolution.y) + resolution.y) * 0.5));
  outputColor = color;
}

#version 150

const int number_of_targets = 2;

uniform float time;

uniform vec2 resolution;

uniform sampler2DRect tex;

uniform vec4 targets[number_of_targets];

uniform vec4 sizes[number_of_targets];

in vec2 texCoordVarying;

out vec4 outputColor;

void main() {

vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y);

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

vec2 t = vec2(targets[i].x, -targets[i].y) / min(resolution.x, resolution.y) * 2.0;

t.xy += vec2(-resolution.x, resolution.y) / min(resolution.x, resolution.y);

vec2 sz = vec2(sizes[i].x, -sizes[i].y) / min(resolution.x, resolution.y) * 2.0;

vec2 q = p - t;

float d = length(q);

if(d < length(sz)){

float a = atan(q.y, q.x);

float x = t.x + cos(a + time * 5 + floor(d * 10) * 0.5) * d;

float y = t.y + sin(a + time * 5 + floor(d * 10) * 0.5) * d;

p = vec2(x, y);

}

vec4 color = texture(tex, vec2((p.x * min(resolution.x, resolution.y) + resolution.x) * 0.5, resolution.y - (p.y * min(resolution.x, resolution.y) + resolution.y) * 0.5));

outputColor = color;

}

[ Link ]
https://github.com/junkiyoshi/Insta20180904

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2018年9月2日2018年9月2日

Mix 2 Video. openFrameworks

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[ About ]
2つの動画をミックス

Mix 2 video.

[ 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 mouseEntered(int x, int y) {};
	void mouseExited(int x, int y) {};
	void windowResized(int w, int h) {};
	void dragEvent(ofDragInfo dragInfo) {};
	void gotMessage(ofMessage msg) {};

	cv::Size cap_size;

	cv::VideoCapture cap1;
	cv::Mat frame1;
	ofImage image1;

	cv::VideoCapture cap2;
	cv::Mat frame2;
	ofImage image2;

	ofFbo src;
	ofFbo dst;

	ofShader shader;
};

#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 mouseEntered(int x, int y) {};

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

cv::Size cap_size;

cv::VideoCapture cap1;

cv::Mat frame1;

ofImage image1;

cv::VideoCapture cap2;

cv::Mat frame2;

ofImage image2;

ofFbo src;

ofFbo dst;

ofShader shader;

};

#include "ofApp.h"

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

	ofSetFrameRate(60);
	ofSetWindowTitle("openframeworks");

	this->cap1.open("video1.mp4");
	this->cap2.open("video2.mp4");
	this->cap_size = cv::Size(1280, 720);

	this->image1.allocate(this->cap_size.width, this->cap_size.height, OF_IMAGE_COLOR);
	this->frame1 = cv::Mat(cv::Size(this->image1.getWidth(), this->image1.getHeight()), CV_MAKETYPE(CV_8UC3, this->image1.getPixels().getNumChannels()), this->image1.getPixels().getData(), 0);

	this->image2.allocate(this->cap_size.width, this->cap_size.height, OF_IMAGE_COLOR);
	this->frame2 = cv::Mat(cv::Size(this->image2.getWidth(), this->image2.getHeight()), CV_MAKETYPE(CV_8UC3, this->image2.getPixels().getNumChannels()), this->image2.getPixels().getData(), 0);

	this->src.allocate(ofGetWidth(), ofGetHeight());
	this->dst.allocate(ofGetWidth(), ofGetHeight());

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

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

	cv::Mat src;

	this->cap1 >> src;
	if (src.empty()) {

		this->cap1.set(CV_CAP_PROP_POS_FRAMES, 1);
		return;
	}
	cv::resize(src, this->frame1, this->cap_size);
	cv::cvtColor(this->frame1, this->frame1, CV_BGR2RGB);
	this->image1.update();

	this->cap2 >> src;
	if (src.empty()) {

		this->cap2.set(CV_CAP_PROP_POS_FRAMES, 1);
		return;
	}
	cv::resize(src, this->frame2, this->cap_size);
	cv::cvtColor(this->frame2, this->frame2, CV_BGR2RGB);
	this->image2.update();
}

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

	this->dst.begin();
	ofClear(0);

	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniformTexture("tex1", this->image1, 1);
	this->shader.setUniformTexture("tex2", this->image2, 2);

	this->src.draw(0, 0);
	this->shader.end();

	this->dst.end();

	this->dst.draw(0, 0);
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

this->cap1.open("video1.mp4");

this->cap2.open("video2.mp4");

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

this->image1.allocate(this->cap_size.width, this->cap_size.height, OF_IMAGE_COLOR);

this->frame1 = cv::Mat(cv::Size(this->image1.getWidth(), this->image1.getHeight()), CV_MAKETYPE(CV_8UC3, this->image1.getPixels().getNumChannels()), this->image1.getPixels().getData(), 0);

this->image2.allocate(this->cap_size.width, this->cap_size.height, OF_IMAGE_COLOR);

this->frame2 = cv::Mat(cv::Size(this->image2.getWidth(), this->image2.getHeight()), CV_MAKETYPE(CV_8UC3, this->image2.getPixels().getNumChannels()), this->image2.getPixels().getData(), 0);

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

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

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

}

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

void ofApp::update() {

cv::Mat src;

this->cap1 >> src;

if (src.empty()) {

this->cap1.set(CV_CAP_PROP_POS_FRAMES, 1);

return;

}

cv::resize(src, this->frame1, this->cap_size);

cv::cvtColor(this->frame1, this->frame1, CV_BGR2RGB);

this->image1.update();

this->cap2 >> src;

if (src.empty()) {

this->cap2.set(CV_CAP_PROP_POS_FRAMES, 1);

return;

}

cv::resize(src, this->frame2, this->cap_size);

cv::cvtColor(this->frame2, this->frame2, CV_BGR2RGB);

this->image2.update();

}

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

void ofApp::draw() {

this->dst.begin();

ofClear(0);

this->shader.begin();

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

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

this->shader.setUniformTexture("tex1", this->image1, 1);

this->shader.setUniformTexture("tex2", this->image2, 2);

this->src.draw(0, 0);

this->shader.end();

this->dst.end();

this->dst.draw(0, 0);

}

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

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;
in vec2 texcoord;
out vec2 texCoordVarying;

void main(){

	texCoordVarying = texcoord;
	gl_Position = modelViewProjectionMatrix * position;
}

#version 150

uniform mat4 modelViewProjectionMatrix;

in vec4 position;

in vec2 texcoord;

out vec2 texCoordVarying;

void main(){

texCoordVarying = texcoord;

gl_Position = modelViewProjectionMatrix * position;

}

#version 150

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

in vec2 texCoordVarying;
out vec4 outputColor;

float mod289(float x){return x - floor(x * (1.0 / 289.0)) * 289.0;}
vec4 mod289(vec4 x){return x - floor(x * (1.0 / 289.0)) * 289.0;}
vec4 perm(vec4 x){return mod289(((x * 34.0) + 1.0) * x);}

float noise(vec3 p){
    vec3 a = floor(p);
    vec3 d = p - a;
    d = d * d * (3.0 - 2.0 * d);

    vec4 b = a.xxyy + vec4(0.0, 1.0, 0.0, 1.0);
    vec4 k1 = perm(b.xyxy);
    vec4 k2 = perm(k1.xyxy + b.zzww);

    vec4 c = k2 + a.zzzz;
    vec4 k3 = perm(c);
    vec4 k4 = perm(c + 1.0);

    vec4 o1 = fract(k3 * (1.0 / 41.0));
    vec4 o2 = fract(k4 * (1.0 / 41.0));

    vec4 o3 = o2 * d.z + o1 * (1.0 - d.z);
    vec2 o4 = o3.yw * d.x + o3.xz * (1.0 - d.x);

    return o4.y * d.y + o4.x * (1.0 - d.y);
}

void main() {

  vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y);

  float v = noise(vec3(p.x * 1.5, p.y * 1.5 + time, 0.0));

  vec4 c1 = texture(tex1, texCoordVarying) * v;
  vec4 c2 = texture(tex2, texCoordVarying) * (1 - v);

  outputColor = c1 + c2;
}

#version 150

uniform float time;

uniform vec2 resolution;

uniform sampler2DRect tex1;

uniform sampler2DRect tex2;

in vec2 texCoordVarying;

out vec4 outputColor;

float mod289(float x){return x - floor(x * (1.0 / 289.0)) * 289.0;}

vec4 mod289(vec4 x){return x - floor(x * (1.0 / 289.0)) * 289.0;}

vec4 perm(vec4 x){return mod289(((x * 34.0) + 1.0) * x);}

float noise(vec3 p){

vec3 a = floor(p);

vec3 d = p - a;

d = d * d * (3.0 - 2.0 * d);

vec4 b = a.xxyy + vec4(0.0, 1.0, 0.0, 1.0);

vec4 k1 = perm(b.xyxy);

vec4 k2 = perm(k1.xyxy + b.zzww);

vec4 c = k2 + a.zzzz;

vec4 k3 = perm(c);

vec4 k4 = perm(c + 1.0);

vec4 o1 = fract(k3 * (1.0 / 41.0));

vec4 o2 = fract(k4 * (1.0 / 41.0));

vec4 o3 = o2 * d.z + o1 * (1.0 - d.z);

vec2 o4 = o3.yw * d.x + o3.xz * (1.0 - d.x);

return o4.y * d.y + o4.x * (1.0 - d.y);

}

void main() {

vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y);

float v = noise(vec3(p.x * 1.5, p.y * 1.5 + time, 0.0));

vec4 c1 = texture(tex1, texCoordVarying) * v;

vec4 c2 = texture(tex2, texCoordVarying) * (1 - v);

outputColor = c1 + c2;

}

[ Link ]
https://github.com/junkiyoshi/Insta20180902

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2018年8月31日2018年8月31日

3Frame convert to RGB. openFrameworks

[ Video ]

[ About ]
動画の3フレームをシェーダーへ送信。各フレームからRGBの1要素のみを抽出して合成。

Send 3 frames to shader. Only one elements of RGB is extracted from each frame and synthesized.

[ 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 mouseEntered(int x, int y) {};
	void mouseExited(int x, int y) {};
	void windowResized(int w, int h) {};
	void dragEvent(ofDragInfo dragInfo) {};
	void gotMessage(ofMessage msg) {};

	cv::VideoCapture cap;
	cv::Size cap_size;
	vector<cv::Mat> frames;
	vector<ofImage> images;
	
	ofFbo src;
	ofFbo dst;

	ofShader shader;
};

#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 mouseEntered(int x, int y) {};

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

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

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

cv::VideoCapture cap;

cv::Size cap_size;

vector<cv::Mat> frames;

vector<ofImage> images;

ofFbo src;

ofFbo dst;

ofShader shader;

};

#include "ofApp.h"

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

	ofSetFrameRate(30);
	ofSetWindowTitle("openframeworks");

	this->cap.open("image32.mp4");
	this->cap_size = cv::Size(1280, 720);

	cv::Mat cap_frame;
	while(true){

		this->cap >> cap_frame;
		if (cap_frame.empty()) {

			break;
		}

		ofImage image;
		image.allocate(this->cap_size.width, this->cap_size.height, OF_IMAGE_COLOR);
		cv::Mat frame = cv::Mat(cv::Size(image.getWidth(), image.getHeight()), CV_MAKETYPE(CV_8UC3, image.getPixels().getNumChannels()), image.getPixels().getData(), 0);
	
		cv::resize(cap_frame, cap_frame, this->cap_size);
		cv::cvtColor(cap_frame, cap_frame, CV_BGR2RGB);
		cap_frame.copyTo(frame);
	
		this->frames.push_back(frame);
		this->images.push_back(image);
	}
	
	this->src.allocate(ofGetWidth(), ofGetHeight());
	this->dst.allocate(ofGetWidth(), ofGetHeight());

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

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

}

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

	int frame_number = ofGetFrameNum() % this->images.size();

	this->dst.begin();
	ofClear(0);

	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniformTexture("tex0", this->images[(frame_number + 0) % this->images.size()], 1);
	this->shader.setUniformTexture("tex1", this->images[(frame_number + 5) % this->images.size()], 2);
	this->shader.setUniformTexture("tex2", this->images[(frame_number + 10) % this->images.size()], 3);

	this->src.draw(0, 0);
	this->shader.end();

	this->dst.end();

	ofSetColor(255);
	this->dst.draw(0, 0);

}

//--------------------------------------------------------------
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");

this->cap.open("image32.mp4");

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

cv::Mat cap_frame;

while(true){

this->cap >> cap_frame;

if (cap_frame.empty()) {

break;

}

ofImage image;

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

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

cv::resize(cap_frame, cap_frame, this->cap_size);

cv::cvtColor(cap_frame, cap_frame, CV_BGR2RGB);

cap_frame.copyTo(frame);

this->frames.push_back(frame);

this->images.push_back(image);

}

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

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

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

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

int frame_number = ofGetFrameNum() % this->images.size();

this->dst.begin();

ofClear(0);

this->shader.begin();

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

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

this->shader.setUniformTexture("tex0", this->images[(frame_number + 0) % this->images.size()], 1);

this->shader.setUniformTexture("tex1", this->images[(frame_number + 5) % this->images.size()], 2);

this->shader.setUniformTexture("tex2", this->images[(frame_number + 10) % this->images.size()], 3);

this->src.draw(0, 0);

this->shader.end();

this->dst.end();

ofSetColor(255);

this->dst.draw(0, 0);

}

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

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;
in vec2 texcoord;
out vec2 texCoordVarying;

void main(){

	texCoordVarying = texcoord;
	gl_Position = modelViewProjectionMatrix * position;
}

#version 150

uniform mat4 modelViewProjectionMatrix;

in vec4 position;

in vec2 texcoord;

out vec2 texCoordVarying;

void main(){

texCoordVarying = texcoord;

gl_Position = modelViewProjectionMatrix * position;

}

#version 150

uniform float time;
uniform vec2 resolution;
uniform sampler2DRect tex0;
uniform sampler2DRect tex1;
uniform sampler2DRect tex2;

in vec2 texCoordVarying;
out vec4 outputColor;

void main() {

  vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y);

  float r = texture(tex2, texCoordVarying).r;
  float g = texture(tex1, texCoordVarying).g;
  float b = texture(tex0, texCoordVarying).b;

  outputColor = vec4(r, g, b, 1.0);
}

#version 150

uniform float time;

uniform vec2 resolution;

uniform sampler2DRect tex0;

uniform sampler2DRect tex1;

uniform sampler2DRect tex2;

in vec2 texCoordVarying;

out vec4 outputColor;

void main() {

vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y);

float r = texture(tex2, texCoordVarying).r;

float g = texture(tex1, texCoordVarying).g;

float b = texture(tex0, texCoordVarying).b;

outputColor = vec4(r, g, b, 1.0);

}

[ Link ]
https://github.com/junkiyoshi/Insta20180831

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