You will need Photosshop
And a picture ! ^^
Here, it's a picture of Dexter.
Step 1: Step 1 : Grayscale and Copy
Go to image > mode > greyscale
Then make ctrl + J (it's a copy of your image)
Then make ctrl + I (negative mode)
Step 2: Step 2 : Draw Mode
Look the picture to see where is color dodge
The picture will be totaly white.
Don't panic ! It's normal.
Step 3: Step 3 : the Final !
And that's all ! Easy and fast