Example Internal algorithms: soil
Soil level is an important indicator for fitness level of note
Reflection level
Mean: 174.3
Median: 179
* Higher reflection value indicates a cleaner note
Reflection level
Mean: 144.3
Median: 147
* Higher reflection value indicates a cleaner note
Fitness Test Decks created by Snowfish
- Once Snowfish has learned a denomination, it can create test decks in a matter of 2 hours instead of days
- The test decks Snowfish creates are objective and repeatable
- Snowfish creates test decks without the problems encountered with visual classification
- Snowfish Test Decks can be used for improving performance of sorting machines
Snowfish SP Fitness deck defined by human perception
Snowfish SP Fitness decks defined by Snowfish
What can Snowfish do for polymer
These images show the real reason why polymer notes are considered as unfit
The precise measurements Snowfish makes of the wrinkles are a direct indicator for the fit or unfitness
3D images, Intaglio and Crinkles
Crinkles
Intaglio
Ink-wear on polymer
Ink wear is predominant fitness criterion
Ink wear categories:
- Intaglio wear
- Offset wear
- Substrate-white wear
de-inking example
Scratch in middle of picture
Scratch in middle of picture
Image in IR
Image in other colors
Red
Green
Blue
Snowfish uses various techniques to detect ink wear
Offset ink wear
Detection in center area of note.
Algorithm regardless of overprint
Reverse print has no influence
Ink wear of substrate white
Same technique with other threshold
Identification of white ‘base layer’ pixels
intaglio ink wear
Selection of intaglio print
Pixel threshold definition
Mask technique
Ink wear pixels
Ink wear near transparent window
Pixel threshold definition
Mask technique
Algorithm
