It is recognized only by putting a number in front of the 7-segment number.

[SeongJongKwak]

https://global.discourse-cdn.com/standard10/uploads/processingfoundation1/optimized/3X/7/5/75d3e6920e519eaf1379a6da4b20a5d64474e17f_2_690x266.jpeg
https://discourse.processing.org/t/i-have-a-question-regarding-ocr/39466/2

It is recognized only by putting a number in front of the 7-segment number.

Environment :

1. Works on tess4j-4.0.0.
2. ssd.traineddata

The problem is that the number must be entered arbitrarily in front of it to be interpreted.
It is not immediately recognized as a 7-segment number.
Why?