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udaykiran
06-28-2005, 04:40 AM
Hi all
I need help on HDRI.
Can anybody show me how can a jpeg image can be modified into in to HDR image.
I have HDR shop and I also downloaded Lightgen plugin. Does any body know what is the use of the plugin.

Thanx

tomhosking
06-28-2005, 08:35 AM
if you want a true hdri, then youll need more than one jpg, each at different exposures on your camera. if you have photoshop cs2, it now has a feature where you can put a number of jpgs together into an hdr image. ive never used hdr shop, cant help you there im afraid...

Andrew W
06-28-2005, 09:35 AM
I would strongly suggest reading this (http://www.debevec.org/Research/HDR/). It should explain things pretty exhaustively for you.

A

_david
06-28-2005, 01:40 PM
lightgen is not a good thing to use. to match the needs of any shot - in my oppinion - its better to set the light by yourself; also lightgen is taking a lot of time when using many iterations for "exact" lighting.

as said above, visit debevec.org and read through.

Tlock
07-12-2005, 04:11 PM
I'm not sure how you can feel like you could give advice on HDR if you don't even know HDR Shop. Photoshop CS2 in the world of HDR editing is still at the bottom of the pile (i'm sure not for long). The tools available are very limited and don't even meet the requirements of a HDR editor. HDR is a concept that refers to the range of bright and dark areas, so just converting an image from JPEG to and HDRi doesn't truely make it an HDR image, since HDRi's are file formats used to capture the HDR concept, which is not possible with files such as JPEG's, PNG's and BMP's. Take a look at some slightly more advanced HDR image editors, such Photogenics HDR, Artizen ZE HDR or CinePaint. Each of these applications is significantly more advanced in the HDR realm than Photoshop CS2 (maybe CS3 will have better support).

Below i added some great links to help you out.

http://www.supportingcomputers.net/Applications/Artizen/Tutorials/WhatisHDRi.htm
http://www.debevec.org/HDRShop/tutorial/tutorial5.html

_david
07-14-2005, 12:48 PM
sorry for this

_david
07-14-2005, 12:50 PM
sorry again....

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