Example 1
OCR'ing a simple document
This is a page from a book scanned at 300dpi, you can download the image HERE if you want to try (if the image just opens in your browser then you may need to right-click and choose 'save link as' or 'save target as'
Ok, the image is quite good but this scan has very dirty borders and if we just press the OCR button we will get results similar to those below:
| Q it ( { . » Horizontally Layered Rock 223 { V ( ( = . i2,. performed on cylinders with height (h) equal to twice the diameter; and hm, is the ’ ji ° ~ Q ( minimum height of a cubical specimen of pillar material such that an increase in - { p( the specimen dimension will produce no further reduction in strength. In experi- ( Xi ( B ments conducted by Bieniawski (1968), hm, was l m (Figure 3.2.1). Equation 7.4 (T § g applies only for h 5 hm,. it g ( Using square pillars in a room and pillar panel presents a long roof span at the i ; j intersections of rooms. If roof stability is a problem, then long pillars will be , , warranted. Roof stability generally controls the width of rooms, whereas pillar ( J strength controls the relative separation of rooms. Roof stability can be critical in E , t horizontally layered rock. , ·i ( . ‘ S . |
The text recognition is fine but because of the dirty borders the OCR engine has tried to read text to the edges of the page which has added some extra characters, this would be time consuming to clean up so on the next scan lets just draw a box around the text.
I have drawn a box while holding down the left mouse button
Now pressing on the OCR button FreeOCR just OCR's the selected area and we get the results below
| I-lorizontally Layered Rock 223 performed on cylinders with height (h) equal to twice the diameter; and hm, is the minimum height of a cubical specimen of pillar material such that an increase in the specimen dimension will produce no further reduction in strength. In experi- ments conducted by Bieniawski (1968), hm, was l m (Figure 3.2.1). Equation 7.4 applies only for h 5 hm,. Using square pillars in a room and pillar panel presents a long roof span at the intersections of rooms. If roof stability is a problem, then long pillars will be warranted. Roof stability generally controls the width of rooms, whereas pillar strength controls the relative separation of rooms. Roof stability can be critical in horizontally layered rock. |
Just that small extra step has increased the results dramatically.
Now we have the text we can copy it from the text window into Word or any Windows program.
Thats was pretty basic but on the next page we will OCR and reconstruct a document containing 2 columns and a photo