Posts Tagged ‘HDR

15
Feb
09

HDR: First Step

A friend told me about HDR this week.

The principle is the following:

1- Taking three RAW pics on a tripod of the same thing

2- AEB -2 / 0 / +2

3- Upload the 3 pics in a magic product [photomatix]

And magic, a new pic is born.

Photomatix: Bad. I’m sorry to have to say that, but it creates a lot of color artefact, spoiling your image.

I started thinking … the concept is wonderful. It can be used. But it should be used like all other image manipulations. Meaning via layers.

I read on a blog someone doing it using MERGE TO HDR in photoshop. For your information, photoshop displays the following message when you try to use it … “Quality will be lost; you should not use this feature” …something like that.

This is my first HDR pic. I did a very big mistake, which explained the poor quality. My ISO was set @ 640. I forgot to change it from my last photo shoot. It should be the lowest possible. 100 or even 50 if your camera allows you to do so.

You have to use the following layer in this order:

  • Copy of the backdrop
  • Layer +2 (overlay or light)
  • Layer -2 (overlay)
  • Layer 0 (which is the perfect exposure)

Do not hesitate to play with the blending.

Why do I copy the original pic on top of the other layer? To reveal only the interesting color of the HDR and keep the quality of the original pic.

(of course, this pic is a bad example since I was using the ISO640!!!)

But the concept is here …

hdr4

Cheers,

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