Subsections

• Search on possible locations
• Example: Poaceae pore
• Example: Cupressaceae cytoplasm
• Example: Olea reticulum

Second step of recognition: search of specific pollen characteristics

Search on possible locations

The characteristics are searched in their possible locations (complete grain, exine, or inside the grain).

Original image	Complete grain	Inside grain	Exine

Differents masks for an Olea pollen grain.

The image sequence can be analyzed to find the images of interest, i.e. the images that contains clear (on focus) characteristics.

Blur analysis computed vs image number in the sequence.

Example: Poaceae pore

The pore of the Poaceae can appear anywhere on its surface, but is visible through several image.

image 35/100	image 50/100	image 65/100	image 80/100

Example: Cupressaceae cytoplasm

The cytoplasm of the Cupressaceae is located in the center of the grain. It is known to have a star-like shape, but this cannot be verifier for many examples. It appears mostly as a bright zone visible in several images near the center.

image 40/100	image 50/100	image 60/100

Example: Olea reticulum

The reticulum is located on the grain surface, but can be analyzed mostly on the top of bottom image of the grain (which show the best view fo the surface).

Not all pollen types are reticulated. So the steps to follow are:

• Check if the pollen grain is reticulated (3D analysis)
• Localize the reticulum (2D analysis)
• Analyze the reticulum