我正在做一个项目，通过在伺服器顶部使用摄像头，将您的脸保持在屏幕中央。我在 arduino 游乐场网站上使用了简单的伺服控制教程，使用鼠标来控制伺服，并尝试重写它以使用您脸部的 x 坐标使伺服朝所需的方向移动。
到目前为止，我已经将它与内置摄像头一起使用。伺服器在我的脸的正确方向上很好地移动。但是，一旦我在伺服器顶部使用外部 USB 摄像头而不是内置摄像头，我就没有得到想要的结果。相机不想看我。一旦它检测到你的脸，它就会朝相反的方向直转。因此，如果相机在屏幕左侧检测到您的脸，伺服器将向右转，直到您的脸离开屏幕。
我希望有人可以回答或帮助我解释为什么它可以与内置摄像头一起使用，但当我使用连接在伺服器上的 USB 摄像头时却不行。
我在 Processing 中使用 Arduino、Processing 和 OpenCV 库。
这是我到目前为止的代码：
Arduino代码：
#include <Servo.h>
Servo servo1; Servo servo2;
void setup() {
servo1.attach(4);
servo2.attach(10);
Serial.begin(19200);
Serial.println("Ready");
}
void loop() {
static int v = 0;
if ( Serial.available()) {
char ch = Serial.read();
switch(ch) {
case '0'...'9':
v = v * 10 + ch - '0';
/*
so if the chars sent are 45x (turn x servo to 45 degs)..
v is the value we want to send to the servo and it is currently 0
The first char (ch) is 4 so
0*10 = 0 + 4 - 0 = 4;
Second char is 4;
4*10 = 40 + 5 = 45 - 0 = 45;
Third char is not a number(0-9) so we drop through...
*/
break;
case 's':
servo1.write(v);
v = 0;
break;
case 'w':
servo2.write(v);
v = 0;
break;
case 'd':
servo2.detach();
break;
case 'a':
servo2.attach(10);
break;
}
}
}
我的处理代码：
import gab.opencv.*;
import processing.video.*;
import java.awt.*;
//----------------
import processing.serial.*;
int gx = 15;
int gy = 35;
//int spos=90;
float midden=90;
float leftColor = 0.0;
float rightColor = 0.0;
Serial port;
//----------------
Capture video;
OpenCV opencv;
void setup() {
size(640, 480);
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]);
}
}
//----------------
colorMode(RGB, 1.0);
noStroke();
frameRate(100);
//println(Serial.list()); // List COM-ports
//select second com-port from the list
port = new Serial(this, Serial.list()[5], 19200); //arduino aangesloten aan linker USB
//----------------
video = new Capture(this, 640/2, 480/2, "USB2.0 Camera"); //external camera rechter USB
//video = new Capture(this, 640/2, 480/2); //built-in camera
opencv = new OpenCV(this, 640/2, 480/2);
opencv.loadCascade(OpenCV.CASCADE_FRONTALFACE);
video.start();
//-_-_-_-_-_-_-_-_- weergave kleur camera
opencv.useColor();
}
void draw() {
//---------------- Mouse Control
background(0.0);
update(mouseX);
fill(mouseX/4);
rect(150, 320, gx*2, gx*2);
fill(180 - (mouseX/4));
rect(450, 320, gy*2, gy*2);
//----------------
scale(2);
opencv.loadImage(video);
//-_-_-_-_-_-_-_-_- Flip camera image
opencv.flip(OpenCV.HORIZONTAL);
image(video, 0, 0 );
//-_-_-_-_-_-_-_-_-
image(opencv.getOutput(), 0, 0 );
noFill();
stroke(0, 255, 0);
strokeWeight(3);
Rectangle[] faces = opencv.detect();
//println(faces.length);
for (int i = 0; i < faces.length; i++) {
println(faces[i].x + "," + faces[i].y);
rect(faces[i].x, faces[i].y, faces[i].width, faces[i].height); //groene vierkant om het gezicht
ellipse( faces[i].x + 0.5*faces[i].width, faces[i].y + 0.5*faces[i].height, 5, 5 ); //middenpunt v.h. gezicht
midden= (faces[i].x + 0.5*faces[i].width);
//midden= (faces[i].x);
}
}
void captureEvent(Capture c) {
c.read();
}
//---------------- servo controls voor muislocatie en draaiing servo
void update(int x)
{
//Calculate servo postion from mouseX
//spos= x/4;
//Output the servo position ( from 0 to 180)
port.write("s"+midden);
println(midden);
// if( midden>80 && midden<150){
// port.write("s"+90);
// } else if(midden<80){
// port.write("s"+45);
// }else{
// port.write("s"+135);
// }
}
//----------------