DDDI: Distance Diagnostics through Digital Imaging Catherine Davis, CIIDS Project Manager [email protected]
DDDI: Distance Diagnostics through Digital Imaging
Catherine Davis, CIIDS Project Manager
WHAT IS DDDI?A Few Definitions…
• Distance- a far-off place, a place or position far away, or not very close
• Diagnostic- identifying, or used in identifying, the nature or cause of an illness, disorder, or problem
• Digital Images- basically pictures. In the case of DDDI, pictures come from cameras or cameras on microscopes
WHAT IS DDDI?
• Distance Diagnostics through Digital Imaging
• A web site that connects people with agricultural problems to scientists at the University of Georgia.
How does DDDI work?
• Agricultural producers contact a Cooperative Extension Agent about their problem.
• The Agent examines the problem and if the Agent cannot diagnose it, they can submit information and images through the system to experts at The University of Georgia.
How does DDDI work?
• Once the information is submitted, the sample is sent to the diagnostician who makes a diagnosis and sends comments and recommendations back to the Cooperative Extension Agent
• The Agent then shares the diagnosis, comments, and recommendations to the agricultural producer
What do you need for DDDI?
• A computer with Internet access• Imaging equipment:
– Compound microscope– Dissecting microscope– A camera to capture images from the field or
the microscopes
What can DDDI be used for?
• Animal Science• Plant Pathology• Aquaculture• Insects• Crop and Soil Science• Forestry• Horticulture
Examples of DDDI Images
Animal Science
Mites from a bird
Skin fungus warts caused by a virus.
Foal with malformed forelegs
Examples of DDDI Images
Plant Pathology
These images show the damage on a head of cabbage and the microscopic view of the spores inside the lesion on the cabbage head.
Examples of DDDI Images
Aquaculture
These slides are good because they indicate the size of the sample in relation to another common object (hands, a penny, a ruler)
Examples of DDDI Images
Insects
Examples of DDDI Images
Crop and Soil Science
Examples of DDDI Images
Forestry
Examples of DDDI Images
Horticulture
These slides are a good examples of going from an images of the whole sample to magnification of the samples.
A trinocular dissecting microscope(stereoscope)
A stereo dissecting microscope is normally used to view relatively large specimens at magnifications from about 5X to about 50X.
Magnification zoom-control
Focus control
Focus and magnification can be varied to produce the best view of a specimen
A trinocular compound microscope
“Compound” means having multiple objective lenses mounted on a rotating turret (lens holder)
Focusing the microscope on specimen slides can be accomplished with a coarse adjustment control for rapid adjustment, and a fine control for small adjustments, particularly
necessary at high magnification levels.
Coarse control
Fine control
The “mechanical stage” holds specimen slides and allows them to be moved precisely under objective
lenses to focus on any area of interest.
Stage positioning
controls
Place a sample slide on the microscope stage under the lowest power objective lens.