HDR Images Exercise

Today, we have explored in class different ways of processing a HDR subject, using the given RAW samples:

_MG_7654

_MG_7656

Under-exposed Image                         Standard exposure_MG_7659

Over-exposed Image
The 3 methods of producing an HDR image combining three photographs with different exposure levels are the following:

1. Adobe HDR Pro, a Photoshop plugin

2. Compiling the exposures as layers in Photoshop and blending via layer masks

3. Photomatix, HDR software available

I have produce an HDR image of the three photographs with each method and these are the results:

1. HDR Pro

Open bracketed captures in Photoshop: File/Automate/Merge to HDR Pro. HDR Pro will combine automatically the three photographs together, taking each one’s exposure and add them together.

Screen Shot 2013-03-26 at 1.48.03 PM I am now able to adjust the exposure, shadows, highlights, contrast, vibrance, saturation, details etc. and this is the reslut:

HDR2

2. Photomatrix

Screen Shot 2013-03-26 at 2.20.22 PM

With Photomatrix, I had a long list of options of the HDR image produced to chose. Among those, this was the one I liked the best as it looks more “natural” than the rest:

Photomatrix 1

HDR (High dynamic range)

High Dynamic Range Imaging (HDRI or HDR) is a set of methods used in imaging and photography to allow a greater dynamic range between the lightest and darkest areas of an image than current standard digital imaging methods or photographic methods.

HDR is a range of methods to provide higher dynamic range from the imaging process. Non-HDR cameras take pictures at one exposure level with a limited contrast range. This results in the loss of detail in bright or dark areas of a picture, depending on whether the camera had a low or high exposure setting. HDR compensates for this loss of detail by taking multiple pictures at different exposure levels and intelligently stitching them together to produce a picture that is representative in both dark and bright areas.

Example:

HDR_image_+_3_source_pictures_(Cerro_Tronador,_Argentina)