We can easily remove the image background of any
image. For example, Save this image and import it in photoshop. Follow this tutorial to
remove the background grass from this image.
After importing the image, go to extract by filter
> extract (or) Alt+Ctrl+x.
In extract, set the brush size, highlight any color
and start drawing the out line of the Dog just to select the image.
Afer drawing the outline, fill color to the drawn(selected)
image with any color. We can also set the value as smooth.
After fill color,click on the preview button to
see the preview. Now see the final result.The unselected background
will be deleted.