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View Full Version : Found some neat software today..



\m/ Rich \m/
02-01-2009, 11:30 PM
so i was looking around to see if i could find a reason for the noise in my pics, and while i was browsing forums, i saw some mention of a program called Dynamic Photo HDR. I did some playing around with pictures i took on my first outing with chako, and thought id include before and afters. i think its kinda neat, although definitely not the same as real HDR shots. I like the way it makes pictures "pop". The first set there isnt too much change.

Chako, i kinda thiefed your picture from today of the flag and sky, it came out really neat after processing.. I didn't think you would mind, but if you would like i'll remove it.

These pics were done with next to no alteration, just the program defaults.

first 2 sets are mine, 3rd set credit goes to Chako.

http://img.photobucket.com/albums/v241/Chemical_Warfare/HDR/IMG_7748.jpg
http://img.photobucket.com/albums/v241/Chemical_Warfare/HDR/IMG_7748_fhdr.jpg

http://img.photobucket.com/albums/v241/Chemical_Warfare/HDR/IMG_7813.jpg
http://img.photobucket.com/albums/v241/Chemical_Warfare/HDR/IMG_7813_fhdr.jpg

\m/ Rich \m/
02-01-2009, 11:31 PM
photo credit: Chako

http://i145.photobucket.com/albums/r207/Chako_photo/IMG_1531small.jpg
http://img.photobucket.com/albums/v241/Chemical_Warfare/HDR/IMG_1531small_fhdr.jpg

i really like what it did with the clouds here.

oddly enough i dont remember seeing any blue sky today, LOL

Chako
02-02-2009, 07:31 AM
There was a small patch of it. I pointed it out to Daiv as being a nice photo with the flagpole in the foreground. I don't mine anyone using my photographs other than for commercial purposes. The HDR applied to the photographs isn't really true HDR. It tends to make the photos rather noisier in my opinion. It is a nice effect though.

Here is some info for you.


HDR (High Dynamic Range)

HDR is a fun technique that involves a little patience and know how. I have tried it a few times with varying results.

The premise behind HDR is to mimic what the human eye can see. Electronic sensors have an issue of clipping the shadows and highlights. Clipping means that there is no data because the electronic sensor in the camera only has a given capability that comes nowhere near what the human eye can define in terms of light.

So HDR techniques were invented to circumvent this issue with digital sensors.

To properly do HDR, you need a few things. A tripod, a camera, and a non moving subject.

Set the camera on a tripod and point it to your scenery, still life, what not. Set the camera to exposure bracketing. Play in the menu so that you can increase the stance of your exposures. Lets say, -2,0,+2 to start with, and take your photograph. Using auto exposure bracketing is the easy way. You can get nice HDR images from a minimum of 3 images.

A better way, is to set the camera on full metered manual. Figure out your exposure spread, and set the camera accordingly. You want to take more than 3 differently exposed photographs. In fact, the more photos taken, the better for the software to glean all the hidden details for your final image. Likewise, you want to set the exposure scale so that you have completely dark images (for shadow details) to completely blown out high key images (for highlight details).

Then in a program such as Photoshop, or stand alone software like the one you found, feed it the wide exposured series of images, and let it do its magic. The end result should give you more detail and colour variance then with a single digital image with clipped data.

HDR doesn't work on all images. For example, it isn't great with a single image. The software must then darken and lighten the original and then recombine this pseudo series of photographs to get the effect. It is a hit and miss thing, as seen in that last photograph where that big blue blotch has stained the upper right hand corner.

So to do HDR, it takes some time, having to set your camera at different exposures to get a series of photos of the same non moving object from very dark to very light. Then you feed the series of photos into a prost processing software that will recombine them into an image with a greater dynamic range, meaning you should see more details in the shadows and highlighted areas. It is a neat technique and is rather fun to do.

You can't do a moving object, because your results will get all weird when your post processing software tries to combine the series.

\m/ Rich \m/
02-02-2009, 01:50 PM
yeah i realize its false HDR, i sorta mentioned it in my first post.. once i get my hands on a tripod, HDR is sometyhing id definitely be interested in playing with.

i did definitely notice the noise it created in your flagpole picture. still a neat effect with minimal work though, as this program will process a single photo.