Instruction manual

Instruction Manual Roundshot D3 - version 4.05 – May 2013 - © by Seitz Phototechnik AG / Switzerland www.roundshot.ch page 110
5.4.2 Image capture
5.4 HDR workflow
Exp Exp
TDI/Exp TDI/Exp
Resolution
Quality
Speed
1x1 3x3
There are two possible workflows:
Quality: this workflow is designed for the
highest image quality possible. From an image to
the other only the exposure time is changed to
adjust the image brightness.
Speed: This workflow is designed to minimise
the overall time for capturing the images. It is
possible to change exposure time and TDI from
image to image. For fisheye lenses the top and
bottom of the sphere will not be sharp.
Please note that in the “speed example” the 2 first images will be taken with
the fastest rotation time. However as the TDI stages are different, the
exposure time is changed.
In all cases it is very important to save the images in DNG. DNG files contains raw
data allowing the mixing software to accurately mix the images and render a precise
exposure for each pixel.
There are two options for resolution:
• 1x1 allows to get the highest image resolution. However, Photomatix is not able to
read these files. Therefore it will be necessary to first convert them into tiff and then
load them in Photomatix . The other option is to use the Seitz Raw Converter for
mixing the images. However, there are no ghost removal and alignment tools in this
software, yet.
• 3x3 uses images with reduced resolution. The files can be processed without
modification with either Photomatix (recommended) or the Seitz Roundshot
software.
Bracketing TDI Exposure speed
1
2
3
2.5x
2.5x
2.5x
1/800s
1/100s
1/13s
Rotation time
<1 s
5 s
40 s
“Quality”
“Speed” 1
2
3
2.5x
20x
20x
1/800s
1/100s
1/13s
<1 s
<1 s
5 s
46s*
7s*
* Capture time only (without transfer / saving time)