- BCR 2D
- MICR CMC7
- MICR E13B
- Form Identification
- Image Enhancement
- TWAIN and ISIS Scanning
- Black Border Removal
- Lines Removal
- Dynamic Thresholding
- Layout Analysis
- Quality Control
- File Format Conversion
- Book Curvature Correction
- Keystone Correction
When documents scanning
and the acquisition plan is not
parallel to the plane on which the document,
the image obtained suffers
of keystone effect,
or a distortion due to the effect of perspective.
In essence, the lines on the document are parallel, in the scanned image are oblique and convergent.
This effect can be, for example, if you try to photograph a paper document
with the camera of your phone, with a webcam or a digital camera.
To solve this optical aberration can use the keystone correction,
sometimes also called keystone correction effect or perspective.
To perform keystone correction, the system identifies the trapeze implies that the paper acquired by searching for edges and automatically calculates a transformation matrix to convert it into a rectangle.
Once the affine transformation was performed and was made a crop automatically,
that is an automatic cropping of the image, to exclude the area outside the rectangle so
reconstructed, the effect is no longer visible and the document has a very more like a scanned
document with a normal document scanner.
Our products that implement the Keystone Correction technology
For more information on the Keystone Correction technology, it is worthwhile to know how and know our solutions that implement it, you can send us an e-mail to email@example.com or fill in the form below.