我目前正在尝试关注面部检测的this教程。 据我所知,我确信我的opencv依赖是正确的。 当我从opencv处理示例运行face_detection示例时,我收到以下错误消息:
Display -1 does not exist, using the default display instead.
Exception in thread "Animation Thread" java.lang.NoSuchMethodError: processing.core.PApplet.registerMethod(Ljava/lang/String;Ljava/lang/Object;)V
at hypermedia.video.OpenCV.<init>(OpenCV.java:297)
at face_detection.setup(face_detection.java:39)
at processing.core.PApplet.handleDraw(Unknown Source)
at processing.core.PApplet.run(Unknown Source)
at java.lang.Thread.run(Thread.java:662)
这只是我的网络摄像头无法识别吗?我不明白错误信息,而且几个小时试图落后于它并没有让我走得太远。 我正在使用opencv 1.0并处理1.5.1。
这里是face_detection示例代码:
import hypermedia.video.*;
import java.awt.Rectangle;
OpenCV opencv;
// contrast/brightness values
int contrast_value = 0;
int brightness_value = 0;
void setup() {
size( 320, 240 );
opencv = new OpenCV( this );
opencv.capture( width, height ); // open video stream
opencv.cascade( OpenCV.CASCADE_FRONTALFACE_ALT ); // load detection description, here-> front face detection : "haarcascade_frontalface_alt.xml"
// print usage
println( "Drag mouse on X-axis inside this sketch window to change contrast" );
println( "Drag mouse on Y-axis inside this sketch window to change brightness" );
}
public void stop() {
opencv.stop();
super.stop();
}
void draw() {
// grab a new frame
// and convert to gray
opencv.read();
opencv.convert( GRAY );
opencv.contrast( contrast_value );
opencv.brightness( brightness_value );
// proceed detection
Rectangle[] faces = opencv.detect( 1.2, 2, OpenCV.HAAR_DO_CANNY_PRUNING, 40, 40 );
// display the image
image( opencv.image(), 0, 0 );
// draw face area(s)
noFill();
stroke(255,0,0);
for( int i=0; i<faces.length; i++ ) {
rect( faces[i].x, faces[i].y, faces[i].width, faces[i].height );
}
}
/**
* Changes contrast/brigthness values
*/
void mouseDragged() {
contrast_value = (int) map( mouseX, 0, width, -128, 128 );
brightness_value = (int) map( mouseY, 0, width, -128, 128 );
}
答案 0 :(得分:1)
让我们从错误开始:
线程“动画线程”中的异常java.lang.NoSuchMethodError: processing.core.PApplet.registerMethod(Ljava /郎/字符串; Ljava /郎/对象;)V 在hypermedia.video.OpenCV。(OpenCV.java:297)
看起来这个OpenCV Processing包装器正在调用Processing的registerMethod()
并且核心库没有它。与您正在使用的Processing版本和Hypermedia OpenCV包装器可能存在不兼容问题。请记住,这个包装器现在已经很老了。
我建议使用Greg Borenstein's OpenCV Processing library,您可以通过 Sketch&gt;轻松安装在Processing 2+中。导入库...&gt;添加库... 并搜索 OpenCV for Processing 。 库完成安装后,您应该能够运行FaceDetection示例。