Instruction manual

Instruction Manual Roundshot D3 - version 4.05 – May 2013 - © by Seitz Phototechnik AG / Switzerland www.roundshot.ch page 109
5.4.1 HDR overview
HDR
scene
multiple
scans
single
scan
combination of various
under- and over-
exposed
images in a new 32 bits
raw image
tone-mapping = luminance
adjustment on a single image
dng
Tiff
jpeg
16-bit
dng
Tiff
jpeg
16-bit
hdr
exr
32-bit (in
progress)
HDR
tone mapping
HDR
tone mapping
The graph below contains an overview of the different possible HDR techniques.
However, only the multiple HDR solution - mixing differently exposed images - can
lead to a 32bit HDR file with extreme dynamic range.
5.4 HDR workflow
Image capture
Rendering
process
Photography
Noise
Dynamic range
Colour depth
File formats
Single HDR Multiple HDR
• One image
•
Tone-mapping of the
raw image
• Action photography
possible (moving
scenes)
• Amplification of noise
• 11 f-stops (1:2600)
• 16-bit
• dng, tiff, or jpg
• Several images
•
Combination of under-/over-
exposed images into one HDR
image (raw), tone-mapping of
the raw image (optional)
• Only still photography possible
(no moving scenes)
• No additional noise
• A multiple of 11 f-stops
• 16-bit or 32-bit
• dng, tiff, jpg, hdr or exr