APPLY_BOXES: FAILURE! Couldn't find a matching blob

[Chan]

Hi there,

I'm trying to the Tesseract OCR for a group of digits only. Tif/box pair is ready, however, it comes to some fatal failure when I run:

 tesseract digit.meter.exp0.tif digit.meter.exp0 box.train 

The output pasted as follows:

Tesseract Open Source OCR Engine v3.03 with Leptonica

APPLY_BOXES: boxfile line 15/1 ((81,416),(109,457)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 16/1 ((81,335),(111,376)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 21/1 ((150,17),(179,59)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 22/1 ((151,97),(180,139)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 23/1 ((151,176),(181,218)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 24/1 ((150,257),(179,298)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 25/1 ((151,336),(180,376)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 26/1 ((150,417),(180,458)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 27/1 ((150,497),(180,537)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 28/1 ((151,577),(181,616)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 45/1 ((217,415),(246,457)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 46/1 ((217,334),(246,379)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 61/1 ((287,17),(314,60)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 62/1 ((288,97),(316,140)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 63/1 ((289,177),(318,219)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 64/1 ((287,257),(317,299)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 65/2 ((288,336),(318,379)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 66/2 ((289,416),(318,459)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 67/2 ((288,496),(318,539)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 68/2 ((288,576),(318,619)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 69/2 ((289,656),(318,699)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 70/2 ((288,737),(318,780)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 71/2 ((288,817),(318,859)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 72/2 ((288,897),(318,939)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 73/2 ((288,977),(318,1019)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 74/1 ((288,1059),(317,1102)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 75/1 ((286,1137),(316,1180)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 76/1 ((287,1216),(316,1259)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 77/1 ((288,1297),(316,1340)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 78/1 ((289,1376),(317,1419)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 79/1 ((288,1537),(317,1580)): FAILURE! Couldn't find a matching blob

FAIL!

APPLY_BOXES: boxfile line 80/1 ((288,1456),(316,1501)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 89/1 ((354,654),(381,696)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 90/1 ((352,736),(381,777)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 124/1 ((489,256),(518,297)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 125/1 ((488,334),(517,376)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 126/1 ((489,414),(519,456)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 165/1 ((626,335),(653,376)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 166/1 ((624,415),(653,455)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 205/1 ((762,335),(789,377)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 206/1 ((759,415),(789,457)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 245/1 ((897,336),(926,378)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 246/1 ((897,415),(926,457)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 285/1 ((1033,337),(1060,379)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 286/1 ((1032,415),(1061,458)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 307/8 ((1103,496),(1134,536)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 308/8 ((1103,577),(1134,617)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 325/1 ((1169,416),(1200,459)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 326/1 ((1168,336),(1197,379)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 365/1 ((1305,335),(1332,376)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 366/1 ((1305,415),(1332,456)): FAILURE! Couldn't find a matching blob

APPLY_BOXES: boxfile line 367/1 ((1305,495),(1333,536)): FAILURE! Couldn't find a matching blob

APPLY_BOXES:

   Boxes read from boxfile:     400

   Boxes failed resegmentation:      52

   Found 348 good blobs.

   Leaving 81 unlabelled blobs in 0 words.

TRAINING ... Font name = meter

Generated training data for 19 words

I have no idea why n what it's complaining about. Can anyone help guide me to fix such failures?

Many Thanks,

chan