2020年6月6日 – プログラミング de 落描き

[ Video ]

[ About ]
Dance & Frame Difference.

Video source -> https://www.pexels.com/ja-jp/video/2795744/

[ 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) {};
	
	ofEasyCam cam;

	cv::VideoCapture cap;
	cv::Size cap_size;
	int number_of_frames;
	vector<cv::Mat> frame_list;
	
	cv::Mat view_mat;
	ofImage view_image;	
};

#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) {};

ofEasyCam cam;

cv::VideoCapture cap;

cv::Size cap_size;

int number_of_frames;

vector<cv::Mat> frame_list;

cv::Mat view_mat;

ofImage view_image;

};

#include "ofApp.h"

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

	ofSetFrameRate(25);
	ofSetWindowTitle("openFrameworks");

	ofBackground(239);
	ofSetColor(255);
	ofEnableDepthTest();

	this->cap_size = cv::Size(1920, 1080);

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

	this->number_of_frames = 0;

	auto file_path = "D:\\MP4\\Pexels Videos 2795744.mp4";
	this->cap.open(file_path);
	int frame_count = this->cap.get(cv::CAP_PROP_FRAME_COUNT);
	int read_count = 0;
	for (int i = 0; i < frame_count; i++) {

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

			continue;
		}

		cv::resize(src, tmp, this->cap_size);
		cv::cvtColor(tmp, tmp, cv::COLOR_BGR2RGB);

		this->frame_list.push_back(tmp);
		read_count++;
	}
	this->number_of_frames += read_count;

	cout << number_of_frames << endl;
}

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

	int blend_count = 4;
	int blend_span = 5;
	cv::Mat blend;
	for (int i = blend_count; i > 0; i--) {

		int frame_index = (ofGetFrameNum() + i * blend_span) % this->number_of_frames;
		if (i == blend_count) {

			this->frame_list[frame_index].copyTo(blend);
		}
		else {

			int prev_frame_index = (ofGetFrameNum() + (i - 1) *blend_span) % this->number_of_frames;
			cv::Mat tmp = this->frame_list[frame_index] - this->frame_list[prev_frame_index];
			tmp -= 255;
			blend += tmp;
		}
	}

	blend.copyTo(this->view_mat);
	this->view_image.update();
}

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

	this->cam.begin();

	this->view_image.draw(this->view_image.getWidth() * -0.5, this->view_image.getHeight() * -0.5);
	
	this->cam.end();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(25);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetColor(255);

ofEnableDepthTest();

this->cap_size = cv::Size(1920, 1080);

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

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

this->number_of_frames = 0;

auto file_path = "D:\\MP4\\Pexels Videos 2795744.mp4";

this->cap.open(file_path);

int frame_count = this->cap.get(cv::CAP_PROP_FRAME_COUNT);

int read_count = 0;

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

cv::Mat src, tmp;

this->cap >> src;

if (src.empty()) {

continue;

}

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

cv::cvtColor(tmp, tmp, cv::COLOR_BGR2RGB);

this->frame_list.push_back(tmp);

read_count++;

}

this->number_of_frames += read_count;

cout << number_of_frames << endl;

}

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

void ofApp::update() {

int blend_count = 4;

int blend_span = 5;

cv::Mat blend;

for (int i = blend_count; i > 0; i--) {

int frame_index = (ofGetFrameNum() + i * blend_span) % this->number_of_frames;

if (i == blend_count) {

this->frame_list[frame_index].copyTo(blend);

}

else {

int prev_frame_index = (ofGetFrameNum() + (i - 1) *blend_span) % this->number_of_frames;

cv::Mat tmp = this->frame_list[frame_index] - this->frame_list[prev_frame_index];

tmp -= 255;

blend += tmp;

}

blend.copyTo(this->view_mat);

this->view_image.update();

}

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

void ofApp::draw() {

this->cam.begin();

this->view_image.draw(this->view_image.getWidth() * -0.5, this->view_image.getHeight() * -0.5);

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20200606

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日: 2020年6月6日

Dance & Frame Difference. Draw by openFrameworks