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1st Hdr..stuff up

PostPosted: Wed Apr 18, 2007 10:22 pm
by !~DeViNe~DaRkNeSs~!
never tried or researched hdr...played tonight with three same exposure shots for fun....didnt work...i just tried coz i love seeing "pure" hdr images on here :D dunno where the white blotches came from :shock:
Image
laugh away :D
Jeremy

PostPosted: Wed Apr 18, 2007 10:32 pm
by sirhc55
Jeremy - when you say ”same exposure” what do you mean?

HDR is normally composed of three or more shots with bracketed exposures. BTW I like the shot as it is unusual :)

PostPosted: Wed Apr 18, 2007 10:55 pm
by !~DeViNe~DaRkNeSs~!
maybe im a bit too noob at this to try..but...
i thought u take one under exposed img..-2ev then one +2 then one 0.0 then add them together. for this one i just used three identical shots and it did that ^^^ im trying to say that i didnt use any type of bracketing...i think thats right...maybe leave it to u pros and go back to my studio?
i like it for the unusual factor too...i wonder how the white stuff came up?

PostPosted: Wed Apr 18, 2007 11:08 pm
by radar
Jeremy,

not sure where the white comes from but you do need bracketed shots. Like you said -2, 0 and +2 EV.

However, Photomatix can do HDR with only one photo. Give it just one raw file and it will be able to work from that, it will do the bracketing for you.

Keep trying, HDR is fun and you can get some amazing photos with it.

André

PostPosted: Wed Apr 18, 2007 11:16 pm
by rooboy
Were you using a tripod for these shots? Maybe post the 3 original images so someone can work out what happened :?

PostPosted: Wed Apr 18, 2007 11:24 pm
by Underload
For what it's worth, you're not alone with the white patches in a hdr merge. I often get them too. Never in the original bracketed images, just when it comes together.

However, mine look a fair bit different to yours.

PostPosted: Thu Apr 19, 2007 6:59 am
by !~DeViNe~DaRkNeSs~!
thanks for the advice guys :D i played around a bit more and came up with more rubbish images lol but i am figuring it out slowly :D i think i need to take a proper bracketed shot so i can make a set for HDR work...atm i just used that pic coz i have 3 of basically the same shot...NO TRIPOD lol so i might take a shot today with tripod and proper brackets so i can have a proper go :D
could this HDR treament be applied to a portrait in-studio shot?? coz im thinking it would bring a new aspect to my studio work if i can go HDR :D
great vivid shots :D

PostPosted: Thu Apr 19, 2007 11:53 am
by Mr Darcy
I've never tried the technique, but as I understand it, you need identically framed photos with different exposures. You use the different exposure to icrease the overall dynamic range Thus a tripod would be more or less mandatory. Also, the image would need to be pretty much static. an you get your models to "sit" still enough? I have seen it done with models by a master, but the girls were braced which I am sure reduced movement between exposures.

PostPosted: Thu Apr 19, 2007 12:11 pm
by sirhc55
Mr Darcy wrote:I've never tried the technique, but as I understand it, you need identically framed photos with different exposures. You use the different exposure to icrease the overall dynamic range Thus a tripod would be more or less mandatory. Also, the image would need to be pretty much static. an you get your models to "sit" still enough? I have seen it done with models by a master, but the girls were braced which I am sure reduced movement between exposures.


Chloroform or ether works as well 8) 8) 8)

PostPosted: Thu Apr 19, 2007 12:31 pm
by Reschsmooth
Mr Darcy wrote:I've never tried the technique, but as I understand it, you need identically framed photos with different exposures. You use the different exposure to icrease the overall dynamic range Thus a tripod would be more or less mandatory. Also, the image would need to be pretty much static. an you get your models to "sit" still enough? I have seen it done with models by a master, but the girls were braced which I am sure reduced movement between exposures.


One technique I use when bracketing (whether 3 or 7 shots) is to set the servo to continuous. This allows me to fire the 3-7 shots in about a second or so, thereby reducing the incident of movement.

P