Assertion: tesseract | /r/CapableOf | use otsu method
Facets:
value: for binarization
type: PURPOSE
value: for thresholding
type: PURPOSE
Source sentences:
text: Tesseract uses Otsu method for thresholding because generally the input to Tesseract for extracting the text is having image homogeneities.
text: So, while Tesseract does use Otsu method (global thresholding) for binarization, you could pre-process the image with local thresholding methods to get better output from Tesseract.