Monday, 4 November 2013

HDR Research


HDR Research


HDR (High Dynamic Range) Photography is the process of combining three or more pictures at different exposure and lighting and combines them into one. This process creates sharper, more vivid pictures. The pictures are essentially made to bring out more contrast between the darkest and lightest parts of the picture. [1] “Ideally, the photographer takes a range of bracketed photos – that is, photos of the same subject taken with varying shutter speed/aperture combinations in order to produce a set of images with varying luminosity and depth of field.”

HDR can be achieved in many ways, but they all start off the same way. The first step is to take three pictures of the same thing, preferably on a tripod to attain the best results. One picture needs to be over-exposed, one under-exposed and one normal picture, set at the correct exposure. It's important that you change the shutter speed, NOT the aperture -- the reason being that since you will be combining several images to make one, you don't want your DOF to change between shots. From here, paths split.

[2] One way to get HDR from here is to open all three pictures in Photoshop. Go into file, then the Automate submenu, and finally, select “Merge to HDR.” When the box pops up, select your pictures and hit ok. Go to the Image menu, the mode submenu and click on “16 bits per channel.” When the box pops up, go to the little menu and select “Local Adaptation.” Finally, bring the left hand side of the histogram to the beginning of the shadows information. Play around with it until you are happy. The picture is complete.

[3] Go to fotor.com and create an HDR image without the use of Photoshop.

[4]Another way to create an HDR image is using the program “Luminescence-HDR.” Open up your photos and create your image.


No comments:

Post a Comment