'Institute of Electrical and Electronics Engineers (IEEE)'
Doi
Abstract
This paper presents the design, implementation, and
evaluation of an optical fiber imaging based tomographic system
for the 3-D visualization and characterization of a burner
flame. Eight imaging fiber bundles coupled with two RGB chargecoupled
device cameras are used to acquire flame images simultaneously
from eight different directions around the burner. The
fiber bundle has 30k picture elements and an objective lens with
a 92? angle of view. The characteristic evaluation of the imaging
fiber bundles and the calibration of the system were conducted
to ensure the accuracy of the system. A new tomographic algorithm
that combines the logical filtered back-projection and the
simultaneous algebraic reconstruction technique is proposed to
reconstruct the flame sections from the images. A direct comparison
between the proposed algorithm and other tomographic approaches
is conducted through computer simulation for different
test templates and numbers of projections. The 3-D reconstruction
of the cross- and longitudinal-sections of a burner flame from
image projections obtained from the imaging system was also
performed. The effectiveness of the imaging system and computer
algorithm is assessed through experimental tests