Mr x Mr x - 2 months ago 5
Java Question

How to remove white background of an image - java

I would like to remove white background of an image and save it as another image.
I have wrote a code which extracts the background but it leaves some of the pixel value.
Checkout original Image : enter image description here

Checkout cropped image : enter image description here

It still leaves some amount of white background.

I want to remove that also.

Here is my code :

int x1=0;
int y1=0;
boolean res = false;
System.out.println("in formatImage");


//Widht Removal...

for (int x = 0; x <= w-1; x++) {
for (int y = 0; y <= h-1; y++) {
if(new Color(bi1.getRGB(x, y)).getRGB()==-1)
{res=false;}
else if (!new Color(bi1.getRGB(x, y)).equals(Color.WHITE)) {
res = true;
}
if (res) {
for (int p = y; p <= h-1; p++) {
b21.setRGB(x1,p,new Color(bi1.getRGB(x, p)).getRGB());
}
x1++;
res = false;
break;
}
}
}
b21=new BufferedImage(x1,h,BufferedImage.TYPE_INT_RGB);
x1=0;
for (int x = 0; x <= w-1; x++) {
for (int y = 0; y <= h-1; y++) {
if(new Color(bi1.getRGB(x, y)).getRGB()==-1)
{res=false;}
else if (!new Color(bi1.getRGB(x, y)).equals(Color.WHITE)) {
res = true;
}
if (res) {
for (int p = 0; p <= h-1; p++) {
b21.setRGB(x1,p,new Color(bi1.getRGB(x, p)).getRGB());
}
x1++;
res = false;
break;
}
}
}


//Height Removal

for (int y = 0; y <= h-1; y++) {
System.out.println("Y = "+y);
for (int x = 0; x <= x1-1; x++) {
System.out.println("("+x+","+y+") : "+b21.getRGB(x, y));
if (!new Color(b21.getRGB(x, y)).equals(Color.WHITE)) {
res = true;
}
if (res) {
for (int p = 0; p <= x1-1; p++) {
b31.setRGB(p,y1,new Color(b21.getRGB(p, y)).getRGB());

}
y1++;
res = false;
break;
}
}
}
b31=new BufferedImage(x1,y1,BufferedImage.TYPE_INT_RGB);
int ty=y1;
y1=0;
for (int y = 0; y <= h-1; y++) {
for (int x = 0; x <= x1-1; x++) {
if (!new Color(b21.getRGB(x, y)).equals(Color.WHITE)) {
res = true;
}
if (res) {
for (int p = 0; p <= x1-1; p++) {
b31.setRGB(p,y1,new Color(b21.getRGB(p, y)).getRGB());
}
y1++;
res = false;
break;
}
}
}


b31 has final image.

Answer

As Jim said, the colour near body are not pure white. So you modify the following statement of your code & it will work great for you. Replace following command line

if (!new Color(b21.getRGB(x, y)).equals(Color.WHITE)) 

by

 if (new Color(b21.getRGB(x, y)).getRGB()<-1000000) 

This will give you the output which you want. You can vary the shades of white & gray from -1000000 to -2000000