After:-

1. Download The Gimp

2. Open the Image in The Gimp.

3. At the Toolbox, Click on the Free Select Tool.

4. Select the entire object by clicking on the sides of the object. Make sure the first dot and the last dot is linked.

5. At the Menu bar, Click on Select -> Invert.

6. At the Menu bar, [...]]]> Before:-

After:-

1. Download The Gimp

2. Open the Image in The Gimp.

3. At the Toolbox, Click on the Free Select Tool.

4. Select the entire object by clicking on the sides of the object. Make sure the first dot and the last dot is linked.

5. At the Menu bar, Click on Select -> Invert.

6. At the Menu bar, Click on Colors -> Desaturate.

7. At the Desaturate Window, Select Lightness -> Click OK.

8. At the Menu bar, Click on Select -> None.

9. Done.

Select Visible.

Layer -> New Layer.  Set it to Transparency.

Edit -> Paste Into.

Anchor the pasted image onto the new Layer.

Colors -> Desaturate.

Basically what you’ve done is created a Black and White version of the image on a clear transparency above the color version.

Then use the eraser [...]]]> Open the full-color version of the image you wish to transform.

Select Visible.

Layer -> New Layer.  Set it to Transparency.

Edit -> Paste Into.

Anchor the pasted image onto the new Layer.

Colors -> Desaturate.

Basically what you’ve done is created a Black and White version of the image on a clear transparency above the color version.

Then use the eraser feature to erase the part that you want colored.  Zoom in, use different size brushes, etc.

This results in a really cool effect where you have the part of the image that you ‘erased’ in full color, and the rest of the image in black and white.

If you want to, try applying a Gaussian blur to the layer with the black and white.  This makes the black and white ‘background’ appear blurred, while the main color image stays focused.