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need help for HDR
I am a nb for the HDR world. several days ago, I did several tries in CS2 for HDR. The results came out very disappointed. I looks even worse than my original shoots..

I followed the tutorial of HDR. Please give me some advice.Here are my three shoots for a HDR...

Comments (11)

Have photobucket , post multiple pics all the time.you have to belong/be part of a pic hosting site on the web..

I have IE7, so I simply have the photobucket web site up with my pics open on 1 web page, and the dpreview page I am replying to open on another page. write whatever you wish, go to photobucket(left click once on the pic's url link to make it blue, right click select copy), then on the reply page of dpreview position the blinking cursor where you wish, then right click and select paste, the copied url link will appear. if you want the link to the picture put a semicolon after the url, if you want the actual pic-no semicolon. hit enter, if pc, to move cursor to next line. for any additional pics simply repeat...

Comment #1

To do hdr-.

If you put camera into full auto matrix metering, take first shot note fstop and shutter speed. put camera into full manual, see if camera still has the matrix fstop and shutter speed. if yes, then using shutter speed go up 2-4 shutter speeds 1 fstop worth of shutter speed at a time. the back to matrix shutter speed and go down same number of shutter speeds.this is on a tripod with cable release..

No, you should not use 1 raw shot and convert 1 stop up and down, because their is not enough dynamic range in the 1 raw shot. dynamic range is why we are doing this, hdr is trying to get all it can..

The group of shots can be raw or jpeg. if jpeg they can be used as is. if raw remember that you HAVE to batch process all 5-9 shots. this is because the pp has to be all the same on every pic. you cannot, for example make any attempt to get the shadow details of the group of raw pics, because that would require different amounts of pp, and you cannot do that with hdr. the pp for all shots has to be identical..

For me I just shoot them in jpeg and use them from the camera, that way they are all identical because the camera jpeg settings are the same for every shot. I also put my hand streched in front of the lens and take a check shot and when done take a ending shot with hand. this tells me where the hdr group is on my memory card when I transfer to the pc..

The only important item is to bracket using shutter speeds only. if fstops are used it changes dof between shots. and shoot enough shots, 5-9 is the optimum. the only other thought is to shoot a scene that deserves the the hdr technique, too many people are shooting hdr because it is new or different or whatever. many people are using hdr software on scenes that do not have enough dynamic range; they end up with images that have been enhanced by hdr software, they are not hdr images. the dynamic range was not in the scene to begin with.

This can be checked with a spotmeter on different areas. NOTE: use of auto bracketing on a camera may not work unless you know the bracketing is using the shutter speeds to bracket. in any event, you really need 5-9 shots for hdr; this is more than the auto bracket fcn on almost all cameras. and the bracketing has to be both sides of the middle shot. make you use enough brackets to cover the previously checked dynamic range.

And the scene should have no movement, if so the item will blur in the hdr image..

Do not adjust the focus. set the focus on infinity or use a hyperfocalsetup for focus..

Do not adjust the white balance for individual shots. go with awb or 1 setting and do not change it..

Remember, hdr was created and meant for scene that have a dynamic range that exceeds the dynamic range of the camera sensor, about 5-6stops. hdr with the required software allows the user to capture a scen that has very high dynamic range..

Below is a hdr made from 9 shots, 1 fstop apart, it has a dynamic range of 11 fstops, processed with Dynamic-Photo HDR. I was using cs2 but like D-P HDR better. do not care for photomatrix it makes the shot look unreal unnatural and sometimes carttonish..

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Comment #2

Finally, I have created a picasa account to pose my images here..

Here are the 3 images I talked about above. Please give me some advices..

Http://picasaweb.google.com/...ndchoi/UntitledAlbum/photo#5137937839213359298.

Http://picasaweb.google.com/...ndchoi/UntitledAlbum/photo#5137937847803293906.

Http://picasaweb.google.com/...ndchoi/UntitledAlbum/photo#5137937864983163106.

Thanks a lot...

Comment #3

Sorry, here is actual pictures. It is my first time to post images. sorry for the mess..

Href="http://picasaweb.google.com/...ndchoi/UntitledAlbum/photo#5137937864983163106"><img src=".

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Href="http://picasaweb.google.com/...ndchoi/UntitledAlbum/photo#5137937847803293906"><img src=".

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Href="http://picasaweb.google.com/...ndchoi/UntitledAlbum/photo#5137937839213359298"><img src=".

Image control:Zoom outZoom 100%Zoom inExpand AllOpen in new window..

Comment #4

I think Gary gave a good explaination and is certainly a viable way of doing HDR. If you are new to doing HDR and don't have PS CS3 (CS3 has built-in HDR options), then I highly recommend trying Photomatix (google it and download the trial...full version isn't that expensive). BUT use the trial of Photomatix first and get a feel of what you can produce and from there determine if it's a type of manipulation you want to progress further..

Here's a recent series I took (on tripod, AEB -1, 0, and +1 EV...yes only 3 shots...but you can use more if desired). I used a registered version of Photomatix to produce the HDR...simple to use..

-1 EV.

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0 EV.

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+1 EV.

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Final HDR Image.

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Roy Niswanger http://www.motleypixel.com..

Comment #5

I've read the Gary's advice, and I have followed the HDR tutorial and done several tries for these 3 images. But none of my tries were good, even worse than one of the original shots. I think, my question is, is it a good/suitable scene to do the HDR? and I think the most difficult step when I tried the HDR process according to the tutorial was the curve. I think I do not how to play with the curve to produce a good HDR yet, I did try, but I didn't get the good result..

Can someone do a quick HDR using my 3 images above? and give me some advices?.

And by the way, I use photoshop CS2.

Thanks a lot...

Comment #6

To me photomatrix exagerates everything. so, cs2-3 is better iat least you are not getting a cartoon. I was using cs2 for the hdr till I found "Dynamic-Photo HDR". the program has 6 different outputs each with a different "look", and each of the different output can be fine tuned to suit the user. to me with photomatrix you end up with exgaderated colors and a surealistic image no matter what. with dynamic -photo hdr you can get the photomatrix look if that is what you want but it also has 5 other looks that are available. 2 of which are designed to be extremely real looking as to the original scene...

Comment #7

Wondchoi wrote:.

Can someone do a quick HDR using my 3 images above? and give me someadvices?.

And by the way, I use photoshop CS2.

Thanks a lot..

Sure, here's a preview...you're going to have to photoshop out the halo around the mountain top...these halos are artifacts of using Photomatix...I put this one up a bit...just felt good to me .

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Here's the full resolution: motleypixel.com/public/hdr_dpreview.jpg.

Roy Niswanger http://www.motleypixel.com..

Comment #8

Your images were processed by dynamic-photo hdr in the human eye mode for output. I used noise ninja and focus magic only. with focus magic usually no sharpening is needed..

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Please note NO HALOES with this program...

Comment #9

Thank you for your time, guys! I appreciate that. So, both of you didn't use photoshop CS2. I don't have any idea about dynamic photo hdr, maybe I should take the free version to get a try..

If I do HDR in photoshop, is the curve, which is the last step of the most of the photoshop HDR tutorials, the most important thing. I will post my try in photoshop CS2 later. Could you guys take a moment to look at it?.

Thank you for posting your hdr try for me...

Comment #10

What do you think about a little shadow & highlight correction?.

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Http://vette74.smugmug.com..

Comment #11

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This question was taken from a support group/message board and re-posted here so others can learn from it.

 

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