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Saturday, April 10, 2010

Photomerging in Photoshop for extra DOF?

Photomerging is one thing that Photoshop (mine is CS3) does beautifully! Gotta love it! In fact, i helps to get me extra DOF too. How so? Let's dwell into the details here!

First, lets look at the merged image i.e. the outcome:

The whole robber fly is in focus, from head to tail...except the legs...
Big orange robberf ly.........IMG_3222 pano copy

Now lets look at the two pre-merging images that contributed to the merged images above:
the left portion. Note that the right portion of this image is not very in focus.
IMG_3222 copy

the right portion
IMG_3221 copy

The merged images. Notice there's area with empty canvasses on the top left and bottom right. I could have just cropped these out but i chose to add canvas by using the clone tool because i wanted more breathing room for my robber fly.
Untitled_Panorama11 copy

Photoshop must have an intelligent algorithm to select the joint area!
Untitled_Panorama1 copy

Untitled_Panorama1

I definitely couldn't have achieved the same DOF with a single shot. However, I only did this because the robber fly was to big to fit into the frame at the MP-E65's minimum magnification of 1:1 on the crop sensor of the 40D.

So give it a try. File - Automate - Photomerge, then browse and select the images you want merged. The rest is automatic!

Learn other photoshop tricks here:

1. Photomerging 6 shots into one 
2. Manual focus stack for more DOF in CS3 
3. Using clone tool to enhance image 
4.

All images shot with a Canon 40D, Canon MPE65 1X-5X macro lens and Canon MT24EX Twin Flash with DIY Diffuser.

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