| 1 |
The value of the lowest y-axis label on the y-axis (detected or inference from y-axis) |
The lowest y-axis label should be zero |
| 2 |
The increasing rate between each pair of y-axis labels |
The scales of y-axis should be consistent across each pair of neighbor y-axis labels |
| 3 |
If we need to inference the lowest text on the y-axis |
If the lowest label on the y-axis is far from the x-axis, then we might ignore the actual lowest label on the y-axis |
| 4 |
If the y-axis has a mix of integer and float number |
Tesseract might not perform well with float number, and thus the increasing rate in the y-axis might not be accurate |
| 5 |
The probability of being texts |
We prefer texts with a higher probability of being texts |
| 6 |
The OCR confidences of texts on the y-axis |
We prefer predictions of the content of texts with a higher confidence |
| 7 |
The probability of being bar charts |
Our classifier only classifies bar charts. Thus, we prefer figures with a high probability of being bar charts |
