
Final HDR from 1 Single JPEG
Sometimes you are stuck with a single JPEG file and regret not taking several RAW’s to make an HDR. All hope if not lost, because if you play around with a bit of Photoshop and Photomatix, you can make a HDR like looking photo in no time at all. Of course it wont have really much of a dynamic range because the information is not truly there.
Step 1. Open the original file in Photoshop.

Original Image
As you can see its a really dull image taken from my camera from the car. Its a single JPEG with nothing special work done on it.
Step 2. Play with the curves to create an over exposed and an under exposed shot.

Adjusting Curves to create underexposure
Once you have do this, you shall have an underexposed and overexposed pic which look somewhat like this.

Overexposed Shot

Underexposed
Step 3. Open the 3 different exposures using photomatix, play with the tonal ranges and voila you’ll get your fake HDR.
