3.02.01 – Case Study 01 – Aircraft interior scan : SpheronVR SceneCam : Image Post Processing

Post Processing (using native SpheronVR software)

SpheronVR SpheroViewer (native .SPH viewer)

Unlike the iSTAR system, there is no need to post-process the .SPH file (effectively your digital negative), if you wish to view the data via the SpheronVR SpheroView (Immersive Viewer).

This provides very fast access to the scan data, but I would recommend you back-up your data first.

Spheron also have a second immersive viewer, the SpheronViewer.

SpheronVR SpheronViewer (.EXR viewer)

In order to view data via this viewer, you will need to post-process the ‘raw’ .SPH file, and turn it into an OpenEXR.

The SpheronViewer provides additional functionality to the above, most importantly it allows photogrammetry (ie direct measurement to be taken from measurement pairs, more within the glossary, under ‘photogrammetry’).

Post Processing (using native Spheron software included with the system)

One can either process files ‘ad-hoc’ or batch process multiples.

Spheron_Image Processor_01

Above : SceneCam Image Processor window

Dragging or opening an .SPH (or multiples) into above will trigger a second quality window, as below.

Spheron_Image Processor_02

Above : SceneCam Image Processor Quality window

Processing time

  • To process a High resolution (15MP) image takes approximately 1 minute 45 seconds.
  • The creates an OpenEXR* file format for direct viewing within the Spheron viewer
  • To process the Maximum (58MP) resolution file takes approx 5-6 minutes on an i7 2.8GHz computer. Processed file and the original .SPH shown below.
  • Note that we started with 395Mb of data and by return get an EXR of 570Mb, due to the fact that the EXR is a 32-bit file, which still retains ALL exposure data for scene (at time of capture).


Above : Native SPH and processed EXR file – note size of each respective file – an indicator of the data captured by a 32-bit image.

*Unlike the iSTAR system, the EXR file is capable of displaying ‘dynamic’ exposure’ so one can cycle through exposures, whilst viewed through the Spheron Spheroviewer (discussed further on).

Data Output / Export

The native Spheron software also allows a plethora of alternative processing options, outputting data in the most commonly used formats for utilization outside of Spheron applications – these include radiance (HDR) file output for use in Image Based Lighting techniques and tone-mapped TIFFs for point cloud colorization*.

File formats are listed here

  • JPEG (8 bits per color, with quality option)
  • OpenEXR (HDR file format)
  • RADIANCE (compressed HDR file format)
  • TIFF (8, 16 or 32 bits per color, with compression option)

*Point Cloud Colorization will be covered in a subsequent case study.

Next Page : Processed Image Analysis

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