ME 456 - Fall 2001 – H11
Name ________________________
Ten images of a calibration object were digitized at known ranges from a digital camera. The
images are provided in files C05.JPG through C14.JPG where range in inches is indicated by the
two digit integer in the file name (e.g. for C09.JPG, the calibration object was 9 inches from the
camera body). Additionally, two images of an unknown object are provided in files UA.JPG and
UB.JPG at unknown ranges. All files have been archived in H11.ZIP available on the class
webpage.
1) What are the calibration and unknown objects?
calibration object _______________
unknown object _______________
2) Determine focal length for this camera in pixels. f _______________
3) What is the expected standard deviation in range predictions for this calibration?

d _______________
4) Determine range for the unknown object in images A and B.
dA _______________
dB _______________
5) When was the camera refocused? WHY?
__________________________________________________________________
6) What type of lighting was used – incandescent or fluorescent? WHY?
__________________________________________________________________
7) Briefly comment on using JPEG images for image analysis.
__________________________________________________________________
8) [EXTRA CREDIT] Determine the XYZ location of the camera relative to the coordinate
frame shown in image OBLIQUE.JPG and measure the thickness of the object in OBLIQUE.JPG
using photogrammetry. Describe your methodology.
X ____________
Y ____________
Z ____________
t ____________
How? ____________________________________________________________