Workflow Guide cropping
In this processing step, a document image is taken as input and the page is cropped to the content area only (i.e. without noise at the margins or facing pages) by marking the coordinates of the page frame. We strongly recommend to execute this step if your images are not cropped already (i.e. only show the page of a book without a ruler, footer, color scale etc.). Otherwise you might run into severe segmentation problems.
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| Processor | Parameter | Remarks | Call |
|---|---|---|---|
| ocrd-anybaseocr-crop | The input image has to be binarized and should be deskewed for the module to work. |
ocrd-anybaseocr-crop -I OCR-D-BIN -O OCR-D-CROP |
|
| ocrd-tesserocr-crop | Cannot cope well with facing pages (textual noise is detected as text). | ocrd-tesserocr-crop -I OCR-D-BIN -O OCR-D-CROP |
E.g.
- which parameters do you use with what values?
- which parameters are insufficiently documented?
- which aspects of a processor should be parameterizable but are not?
E.g. which processors worked best with what material? -- feel free to post sample images here, too.