First HDR, Problem

tootxbl · Aug 5, 2011

Hi all. New member, first post, first HDR

not posting for critique, I know it's not great and has faults but I'm looking to learn HDR and have found a problem when importing to photomatix. I'm looking to do more realistic stuff but have posted this one as it shows the problem a bit better I think. On each set of pictures I've imported, there are loads of areas in the photos (once merged, not in the raw files) where there are little coloured specs all over the place. Any idea how they appear and how I can get rid of them? I'm using a fuji hs20exr and I used the aperture setting with a +\- 1. I think I imported 5 photos but it did it with 3 photos as well. I deleted them all and only really have this one left as this is the least problematic one.

HDR VXR by Toot77, on Flickr

---
- Sent from my iPad using Tapatalk

Compaq · Aug 5, 2011

I suggest posting the picture in here. Post the BB link (arrow down next to the facebook thingy).

Are you referring to the noise in the photo? The details enhancer really enhanced details which brings out the noise taken. I'm not sure if your camera handles high ISO good. Did you use ISO400 on all RAW files in this?

Bynx · Aug 5, 2011

Too high ISO in a dark situation. Longer shutter speed at lower ISO might help. I just used DeNoise and then applied Unsharp Mask. Are these the results you want?

tootxbl · Aug 6, 2011

Wow, that does look a lot cleaner, I'll make a note of that stuff, thanks. I'll be honest, I have no idea how to set the iso etc on the camera. I only bought it a couple of weeks ago and haven't done much with it yet. I'm no photographer but would like to try and get into it a bit so just bought a reasonably priced camera that seemed to have a fair amount of options, optical zoom was a big selling point for me.

Ok, I'm trying a photo walk tomorrow with the girlfriend, I'll have a look at iso settings and try again comfortable in the knowledge that it's the processing adding this noise I guess. When I did this pic of the car it wasn't dark actually, it was about 5:30pm a couple of nights ago

P.S. Thanks compaq, post edited with your tip!

---
- Sent from my iPad using Tapatalk

Compaq · Aug 6, 2011

The ISO isn't something mystical and dangerous to touch, even if many people seem to think so.
"Just adjust the ISO up a little"
"Ohh, I won't touch that ISO, I always leave it on auto"
Common conversation.

Just google the three exposure terms: aperture, shutter speed and ISO to see how each of these words affect the final outcome of your photo.
Once you really understand how the camera "thinks", then you'll be able to exploit that to try and capture what your artistic eye wants.

Not many years ago, when even the semi-auto modes were rare, everyone set the exposure manually. It wasn't hard back then, and it isn't hard today

nos33 · Aug 6, 2011

what is with the blue on and around the car? I am not sure what it is. Looks like a whole subject halo. cant describe it other than that

Over Exposed · Aug 9, 2011

nos33 said:
what is with the blue on and around the car? I am not sure what it is. Looks like a whole subject halo. cant describe it other than that

Firstly, (severely) improper white balance. That and tone mapping artifacts.

I think there are many issues here outside of the HDR and tone mapping. It may be a good idea to take a few steps back and hone some of the basics. Playing with HDR and tone mapping might only be distracting you from this at the present moment.

vimal · Aug 10, 2011

That looks nice to me, anyone know of a good guide for HDR with a t1i?
Thanks

bigtwinky · Aug 10, 2011

HDR isn't camera specific. Its a process that involves merging multiple exposures.
Where the camera comes into play is being able to set the bracketing. In the first first menus, you should see a place where you can set a 3 bracket up, as well as the different between each shot. ie a -1 , 0 , +1 bracket means you will have one shot under exposed by 1 stop (making the lights darker), one shot exposed nicely and a third shot over exposed by 1 (making the darks have more detail). This can be changed to almost any value (-2, 1, +3 or whatever else) I believe Canons are stuck at a 3 shot bracket, except the 1D which can do more. Not sure about Nikons.

Google HDR, you should find some online guides.

Some people HDR every image. They think it's cool. Which it can be, it's a matter of taste. Personally, I use HDR as a tool in my photo kit to allow me to get a full image nicely detailed when the lighting conditions aren't the best.