edge threshold - Githubissues

MichalBusta / FASText

Efficient Unconstrained Scene Text Detector

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edge threshold #11

Open michath opened 8 years ago

michath commented 8 years ago

seems the local threshold in the paper is implemented as global (=13) in tools/segmentation.py: does it indeed? if so, how much effort is required to make it locally adaptive? thanks!

MichalBusta commented 8 years ago

Hi, so far we have tested several variants:

threshold t as function of intensity of the central pixel (see #ifdef RELATIVE_THRESH in FASTex.cpp)
otsu-like estimate

for ICDAR dataset, the ROC curve does not improve much (but it can be profitable for specific task)

do you have suggestion?

michath commented 8 years ago

only that threshold optimization should probably account for overlapping between correct and incorrect text regions: precision matters more while overlapping whereas recall matters more while there is no overlapping.