| February 5th, 2008 08:33 PM | |
 andreyG
Joined: Sep 19, 2006
Posts: 391 | hdr
I am not sure that this is a propper section - but I have a question. Anybody know how to safe tif from RAW without anything written in exif data? The business is that you can make different exposure pictures from raw formate, but PS refuses to do HDR because of similarity of exif. If no exif (like in small web files) - it does a good job. anybody can help? |
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| February 7th, 2008 03:06 PM | |
LVE
Joined: Aug 1, 2006
Posts: 827 | Great Question
I just tried a few HDR things and had the same problem. I have an idea how to do this now that you gave me a clue. If you have ACD, you can edit Raw with any editor then save as a tiff. I believe you can then edit out the EXIF in the Tiff. I will try and get back to you! |
| February 7th, 2008 04:12 PM | |
LVE
Joined: Aug 1, 2006
Posts: 827 | I know how to do this
I was wrong about ACD Pro 2.0
Here is a way to remove the exif info from the file. Not pretty, but works.
1. Save raw as Tiff
2. Open in PSP 9.0
3. Save immediately as a Tiff with a different name. I opened file "Test" and saved as "Testa"
4. You will get a message that when you do this the exif info will be lost.
5. Delete the original
6. Rename new.
You can download PSP trial version. If this doesn't work, I will send you a copy I have that was free when I bought my camera.
Old Dog New Trick |
| February 11th, 2008 08:12 AM | |
pb
Joined: Sep 18, 2006
Posts: 126 | Ok, now for the unitiated.....
I have to ask WHY do we need to do/know this? Does it improve quality? Save in a better way? Reduce the size of old files?? Sorry to ask such a basic question. Curious, Trish |
| February 11th, 2008 10:50 AM | |
LVE
Joined: Aug 1, 2006
Posts: 827 | Trish
Of course not everyone needs to know this or in fact is using this technique. I am playing with it as is Andrey and a couple of others. One could argue that it should be in another forum. This is hard to control!
What would your recommendation be? Notice that Andrey said up front he did not know if this was the correct section. I will look at creating a new section called Tech Questions.
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| February 17th, 2008 03:19 PM | |
pb
Joined: Sep 18, 2006
Posts: 126 | What I really meant was....
....I did not know what HDR was nor what it does for photography....I think that this IS the correct place for such questions and would never have a problem with such a detail as to location of really good questions, especially from ANdrey. I looked up HDR and copied out the following for those of us who may be still clueless. If I'm the only one here who didn't know...well, now I do.
- HDR: HIGH DYNAMIC RANGE PHOTOGRAPHY -
High dynamic range (HDR) images enable photographers to record a greater range of tonal detail than a given camera could capture in a single photo. This opens up a whole new set of lighting possibilities which one might have previously avoided—for purely technical reasons. The new "merge to HDR" feature of Photoshop CS2 allows the photographer to combine a series of bracketed exposures into a single image which encompasses the tonal detail of the entire series. There is no free lunch however; trying to broaden the tonal range will inevitably come at the expense of decreased contrast in some tones. Learning to use the merge to HDR feature in Photoshop CS2 can help you make the most of your dynamic range under tricky lighting—while still balancing this trade-off with contrast.
MOTIVATION: THE DYNAMIC RANGE DILEMMA
As digital sensors attain progressively higher resolutions, and thereby successively smaller pixel sizes, the one quality of an image which does not benefit is its dynamic range. This is particularly apparent in compact cameras with resolutions near 8 megapixels, as these are more susceptible than ever to blown highlights or noisy shadow detail. Further, some scenes simply contain a greater brightness range than can be captured by current digital cameras-- of any type.
The "bright side" is that nearly any camera can actually capture a vast dynamic range-- just not in a single photo. By varying the shutter speed alone, most digital cameras can change how much light they let in by a factor of 50,000 or more. High dynamic range imaging attempts to utilize this characteristic by creating images composed of multiple exposures, which can far surpass the dynamic range of a single exposure.
WHEN TO USE HDR IMAGES
I would suggest only using HDR images when the scene's brightness distribution can no longer be easily blended using a graduated neutral density (GND) filter. This is because GND filters extend dynamic range while still maintaining local contrast. Scenes which are ideally suited for GND filters are those with simple lighting geometries, such as the linear blend from dark to light encountered commonly in landscape photography (corresponding to the relatively dark land transitioning into bright sky).
Hope this helps somebody else. It did me. |
| February 18th, 2008 09:59 AM | |
LVE
Joined: Aug 1, 2006
Posts: 827 | Thank You
Now, do you want this kind of post in a different forum? |
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