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Help with Blob Detection Problems

[0 Replies]
- 24-Mar-2013 04:59 PM
- Forum: Contributed Library Questions
Hello, my name is Cody
me and my friends are trying to put together a peace using Blob_Detection but we can't seem to get it to fill in the Blobs (all black). More over we would like to implement our own background into the scene while keeping the black Blobs in front of it. We have seen that others have come across the same problem but have not found much for answers. If anyone out there can help us ASAP we would greatly appreciate it. thanks

import processing.video.*;

import blobDetection.*;

Capture cam;

BlobDetection theBlobDetection;

PImage img;

boolean newFrame=false;

void setup()

{

size(1280, 960);

cam = new Capture(this, 40*4, 30*4, 15);

cam.start();

img = new PImage(80,60);

theBlobDetection = new BlobDetection(img.width, img.height);

theBlobDetection.setPosDiscrimination(true);

theBlobDetection.setThreshold(0.3f); // will detect brightness

}

void captureEvent(Capture cam)

{

cam.read();

newFrame = true;

}

void draw()

{

if (newFrame)

{

newFrame=false;

image(cam,0,0,width,height);

img.copy(cam, 0, 0, cam.width, cam.height,

0, 0, img.width, img.height);

fastblur(img, 2);

theBlobDetection.computeBlobs(img.pixels);

drawBlobsAndEdges(true,true);

}

}

void drawBlobsAndEdges(boolean drawBlobs, boolean drawEdges)

{

fill(0);

Blob b;

EdgeVertex eA,eB;

for (int n=0 ; n<theBlobDetection.getBlobNb() ; n++)

{

b=theBlobDetection.getBlob(n);

if (b!=null)

{

if (drawEdges)

{

strokeWeight(10);

stroke(0);

fill(0);

for (int m=0;m<b.getEdgeNb();m++)

{

eA = b.getEdgeVertexA(m);

eB = b.getEdgeVertexB(m);

if (eA !=null && eB !=null)

line(

eA.x*width, eA.y*height,

eB.x*width, eB.y*height

);

}

}

//Blobs

/*if (drawBlobs)

{

strokeWeight(1);

stroke(0);

fill(0);

ellipse(

b.xMin*width,b.yMin*height,

b.w*width,b.h*height

);

}

*/

}

}

}

// ==================================================

// Super Fast Blur v1.1

// by Mario Klingemann

// < http://incubator.quasimondo.com>

// ==================================================

void fastblur(PImage img,int radius)

{

if (radius<1){

return;

}

int w=img.width;

int h=img.height;

int wm=w-1;

int hm=h-1;

int wh=w*h;

int div=radius+radius+1;

int r[]=new int[wh];

int g[]=new int[wh];

int b[]=new int[wh];

int rsum,gsum,bsum,x,y,i,p,p1,p2,yp,yi,yw;

int vmin[] = new int[max(w,h)];

int vmax[] = new int[max(w,h)];

int[] pix=img.pixels;

int dv[]=new int[256*div];

for (i=0;i<256*div;i++){

dv[i]=(i/div);

}

yw=yi=0;

for (y=0;y<h;y++){

rsum=gsum=bsum=0;

for(i=-radius;i<=radius;i++){

p=pix[yi+min(wm,max(i,0))];

rsum+=(p & 0xff0000)>>16;

gsum+=(p & 0x00ff00)>>8;

bsum+= p & 0x0000ff;

}

for (x=0;x<w;x++){

r[yi]=dv[rsum];

g[yi]=dv[gsum];

b[yi]=dv[bsum];

if(y==0){

vmin[x]=min(x+radius+1,wm);

vmax[x]=max(x-radius,0);

}

p1=pix[yw+vmin[x]];

p2=pix[yw+vmax[x]];

rsum+=((p1 & 0xff0000)-(p2 & 0xff0000))>>16;

gsum+=((p1 & 0x00ff00)-(p2 & 0x00ff00))>>8;

bsum+= (p1 & 0x0000ff)-(p2 & 0x0000ff);

yi++;

}

yw+=w;

}

for (x=0;x<w;x++){

rsum=gsum=bsum=0;

yp=-radius*w;

for(i=-radius;i<=radius;i++){

yi=max(0,yp)+x;

rsum+=r[yi];

gsum+=g[yi];

bsum+=b[yi];

yp+=w;

}

yi=x;

for (y=0;y<h;y++){

pix[yi]=0xff000000 | (dv[rsum]<<16) | (dv[gsum]<<8) | dv[bsum];

if(x==0){

vmin[y]=min(y+radius+1,hm)*w;

vmax[y]=max(y-radius,0)*w;

}

p1=x+vmin[y];

p2=x+vmax[y];

rsum+=r[p1]-r[p2];

gsum+=g[p1]-g[p2];

bsum+=b[p1]-b[p2];

yi+=w;

}

}

}

Blob_Detection problems. Help!

[0 Replies]
- 23-Mar-2013 12:33 AM
- Forum: Contributed Library Questions
Hello, my name is Cody
me and my friends are trying to put together a peace using Blob_Detection but we can't seem to get it to fill in the Blobs (all black). More over we would like to implement our own background into the scene while keeping the black Blobs in front of it. We have seen that others have come across the same problem but have not found much for answers. If anyone out there can help us ASAP we would greatly appreciate it. thanks

import processing.video.*;

import blobDetection.*;

Capture cam;

BlobDetection theBlobDetection;

PImage img;

boolean newFrame=false;

void setup()

{

size(1280, 960);

cam = new Capture(this, 40*4, 30*4, 15);

cam.start();

img = new PImage(80,60);

theBlobDetection = new BlobDetection(img.width, img.height);

theBlobDetection.setPosDiscrimination(true);

theBlobDetection.setThreshold(0.3f); // will detect brightness

}

void captureEvent(Capture cam)

{

cam.read();

newFrame = true;

}

void draw()

{

if (newFrame)

{

newFrame=false;

image(cam,0,0,width,height);

img.copy(cam, 0, 0, cam.width, cam.height,

0, 0, img.width, img.height);

fastblur(img, 2);

theBlobDetection.computeBlobs(img.pixels);

drawBlobsAndEdges(true,true);

}

}

void drawBlobsAndEdges(boolean drawBlobs, boolean drawEdges)

{

fill(0);

Blob b;

EdgeVertex eA,eB;

for (int n=0 ; n<theBlobDetection.getBlobNb() ; n++)

{

b=theBlobDetection.getBlob(n);

if (b!=null)

{

if (drawEdges)

{

strokeWeight(10);

stroke(0);

fill(0);

for (int m=0;m<b.getEdgeNb();m++)

{

eA = b.getEdgeVertexA(m);

eB = b.getEdgeVertexB(m);

if (eA !=null && eB !=null)

line(

eA.x*width, eA.y*height,

eB.x*width, eB.y*height

);

}

}

//Blobs

/*if (drawBlobs)

{

strokeWeight(1);

stroke(0);

fill(0);

ellipse(

b.xMin*width,b.yMin*height,

b.w*width,b.h*height

);

}

*/

}

}

}

// ==================================================

// Super Fast Blur v1.1

// by Mario Klingemann

// < http://incubator.quasimondo.com>

// ==================================================

void fastblur(PImage img,int radius)

{

if (radius<1){

return;

}

int w=img.width;

int h=img.height;

int wm=w-1;

int hm=h-1;

int wh=w*h;

int div=radius+radius+1;

int r[]=new int[wh];

int g[]=new int[wh];

int b[]=new int[wh];

int rsum,gsum,bsum,x,y,i,p,p1,p2,yp,yi,yw;

int vmin[] = new int[max(w,h)];

int vmax[] = new int[max(w,h)];

int[] pix=img.pixels;

int dv[]=new int[256*div];

for (i=0;i<256*div;i++){

dv[i]=(i/div);

}

yw=yi=0;

for (y=0;y<h;y++){

rsum=gsum=bsum=0;

for(i=-radius;i<=radius;i++){

p=pix[yi+min(wm,max(i,0))];

rsum+=(p & 0xff0000)>>16;

gsum+=(p & 0x00ff00)>>8;

bsum+= p & 0x0000ff;

}

for (x=0;x<w;x++){

r[yi]=dv[rsum];

g[yi]=dv[gsum];

b[yi]=dv[bsum];

if(y==0){

vmin[x]=min(x+radius+1,wm);

vmax[x]=max(x-radius,0);

}

p1=pix[yw+vmin[x]];

p2=pix[yw+vmax[x]];

rsum+=((p1 & 0xff0000)-(p2 & 0xff0000))>>16;

gsum+=((p1 & 0x00ff00)-(p2 & 0x00ff00))>>8;

bsum+= (p1 & 0x0000ff)-(p2 & 0x0000ff);

yi++;

}

yw+=w;

}

for (x=0;x<w;x++){

rsum=gsum=bsum=0;

yp=-radius*w;

for(i=-radius;i<=radius;i++){

yi=max(0,yp)+x;

rsum+=r[yi];

gsum+=g[yi];

bsum+=b[yi];

yp+=w;

}

yi=x;

for (y=0;y<h;y++){

pix[yi]=0xff000000 | (dv[rsum]<<16) | (dv[gsum]<<8) | dv[bsum];

if(x==0){

vmin[y]=min(y+radius+1,hm)*w;

vmax[y]=max(y-radius,0)*w;

}

p1=x+vmin[y];

p2=x+vmax[y];

rsum+=r[p1]-r[p2];

gsum+=g[p1]-g[p2];

bsum+=b[p1]-b[p2];

yi+=w;

}

}

}

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