0
プログラムは処理3.0でエラーなく実行されますが、ウェブカメラは表示されません。 私は処理から他のキャプチャプログラムを試して、すべてが完璧に動作するので、ウェブカメラが機能していると確信しています。 問題の原因を理解できません。 （私はすでに処理ライブラリがインストールされている）ウェブカメラは処理3.0で開始しません
import processing.video.*;
Capture capture;
int tolerance = 20; //control how much a pixel must be diffrent from the corresponding pixel of the "samplingImage"
int pixelsNecessary = 100; //this describes the quantity of reactive pixels required to set to activare a sensor
int whichMode = 0; //this variables is just to show the functionality and is not necessary
boolean backgroundCaptured = false; //this variable are just to show the functionality and is not necessary
rects[] rects; //this object array contains all the instances of the rectangles defined into the class "rects"
PImage samplingImage; //this is the image that is used check the differences with the live image
void setup(){
size(500,375);
String[] cameras = Capture.list();
if (cameras.length == 0) {
println("There are no cameras available for capture.");
exit();
} else {
println("Available cameras:");
for (int i = 0; i < cameras.length; i++) {
println(cameras[i]);
}
}
samplingImage = createImage(500,375,RGB); //create a new blank image just to define its dimensions
capture = new Capture(this, cameras[15]); //here begins a new sessions of capturing of the images from the webcam
rectMode(CORNERS);
rects = new rects[100]; //define the rects array dimension
//here you can insert more rectangles (sensors) by specifying x1,y1,x2,y2
rects[0] = new rects(100,100,130,130);
rects[1] = new rects(50,200,150,280);
rects[2] = new rects(250,50,380,100);
}
void keyPressed(){
if(key == 'q'){ //if the key is pressed reset a new sampleImage
setSampleImage();
}
//Others keys commands to change the parameters
if(key == 's' && tolerance > 0) tolerance--;
if(key == 'a' && tolerance < 255) tolerance++;
if(key == 'f' && tolerance > 0) pixelsNecessary--;
if(key == 'g' ) pixelsNecessary++;
if(key == 'z') { if(backgroundCaptured==false)backgroundCaptured=true; else backgroundCaptured=false; whichMode++; }
}
void captureEvent(Capture myCapture) {
capture.read(); //this refresh the image captured by webcam and stored in the capture variable
}
void draw(){
int pixelX = -1, pixelY = -1;
if(whichMode % 2 == 1) setSampleImage(); //this is necessary for the motion mode because it needs a new sampleImage every cycle
loadPixels();
capture.loadPixels(); //fill an array of pixels from the current captured image
for(int i=0; i<capture.height*capture.width; i++){ //read every element of the pixels array
pixelX = i % width; //get the real pixel X position
if(pixelX != width) pixelY = (i/width) +1; else pixelY = (i/width); //get the real pixel Y position
if(abs(hue(capture.pixels[i]) - hue(samplingImage.pixels[i])) > tolerance && abs(saturation(capture.pixels[i]) - saturation(samplingImage.pixels[i])) > tolerance && abs(brightness(capture.pixels[i]) - brightness(samplingImage.pixels[i])) >tolerance){ //HSB values comparison between the current image and the sample image at the current pixel
for(int q = 0; q < 100; q++){ //loop trough the rects array
if(rects[q]!=null){
if(pixelX > rects[q].x1 && pixelX < rects[q].x2 && pixelY > rects[q].y1 && pixelY < rects[q].y2) //check if there is a sensors in this part of the image
rects[q].amount++; //increase the number of pixels activated for this sensor
}
}
}
}
image(capture , 0 , 0); //show the live webcam image
if(!backgroundCaptured){ //this is just for this demostration. you nees just what is in the else parenthesis
fill(0 , 0 , 0 , 100);
rect(0,0,width,height-30);
fill(255);
textAlign(CENTER);
text("Go out from the screen and press 'q' key\n in order to capture the background.\n\n Drag the rectangles (sensors) to change the sensors positions.\n\nPress 'a'/'s' keys to decrease/increase the sensors tolerance.\n\nPress 'f'/'g' keys to decrease/increase the number of pixels\n necessary to activate a sensor.\n\n Press 'z' to switch to the motion sensor mode. " , width/2 , 100);
textAlign(LEFT);
}
else
{
for(int q = 0 ; q < 100 ; q++){ //loop trough the rects array
if(rects[q] != null) rects[q].draw(); //draw this rectangle object (go to the class to learn more)
}
}
//these are for this demo as well
fill(0 , 0 , 0 , 200);
stroke(0);
rect(0 , height - 30 , width , height);
fill(255);
text("Tolerance (a/s): " + (255-tolerance) , 10 , height - 10);
text("Pixels required (f/g): " + pixelsNecessary , 150 , height - 10);
if(whichMode%2==1) text("Mode (z): Motion Sensor" , 320 , height - 10); else text("Mode (z): Presence Sensor" , 320 , height - 10);
}
class rects{ //rectangle (sensors) class
int x1 , x2 , y1 , y2 , amount ; //coordinateso of the corner-corner rectangle and the amount of activated pixels
rects(int get_x1 , int get_y1 , int get_x2 , int get_y2){ //lets create a new rectangles with the passed parameters
x1 = get_x1;
y1 = get_y1;
x2 = get_x2;
y2 = get_y2;
}
public void draw(){ //rectangle draw function
noFill();
if(amount > pixelsNecessary || amount == ((x2-x1)*(y2-y1))) fill(255 , 0 , 0); //if the amount is higher than ne pixelsNecessary variable or if it is equal to the number of maximum pixels of a rectangle draw it of red
if(mousePressed && mouseX > x1 && mouseX < x2 && mouseY > y1 && mouseY < y2){ //this is just for this demo in order to let you move the sensors
x1 += mouseX - pmouseX ;
x2 += mouseX - pmouseX ;
y1 += mouseY - pmouseY ;
y2 += mouseY - pmouseY ;
}
//draw the rectangle and the amount value text
stroke(255);
rect(x1 , y1 , x2 , y2);
fill(255);
textAlign(CENTER);
text(amount , x1 + (x2 - x1)/2 , y1 + (y2 - y1)/2 + 5);
amount = 0;
textAlign(LEFT);
}
}
void setSampleImage(){
backgroundCaptured=true; //this is for the demo
loadPixels();
samplingImage.loadPixels(); //fill an array of pixels from the sampling image
for(int i = 0 ; i < capture.height * capture.width ; i++) samplingImage.pixels[i] = capture.pixels[i]; //change every pixel with the current pixel of the live image
samplingImage.updatePixels(); //update the image
}