EXCEPTION_ACCESS_VIOLATION（0xc0000005）在处理语言中使用OpenCV时

My Processing code is below.

我的处理代码如下。

import hypermedia.video.*;
import processing.video.*;
import java.awt.Rectangle;

OpenCV opencv;

int width = 320;
int height = 240;

void setup() {

size( 320, 240 ); //set window size

opencv = new OpenCV( this ); //setup openCV
opencv.capture( width, height ); // open video stream
opencv.cascade( OpenCV.CASCADE_FRONTALFACE_ALT );
}

void draw(){
opencv.read();
image(opencv.image(), 0, 0);
Rectangle[] faces = opencv.detect( 1.2, 2, OpenCV.HAAR_DO_CANNY_PRUNING, 40, 40 );
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 );
  }
}
imp