Image skew in ID card scanning occurs when a card is scanned at an angle rather than straight, resulting in a tilted digital image. This issue happens most often in scanning environments where documents are fed through motor-driven scanners. Image skew involving ID cards is usually caused by improper insertion of the card by the user, but occasionally happens because of a warped or damaged card.
Issues related to a skewed image in ID card scanning can include:
- Parts of the card being outside the scannable area of the camera
- Incomplete or unverifiable security features
- Distortion of the image if the skew causes an uneven feed
- Difficulty or inability to read fine details such as microprinting or 2D barcodes
Manufacturers of many motor-fed scanners, including ID card scanners and check scanners, employ anti-skew measures to prevent or correct image skew. Learn more about what Digital Check does to address image skew here.
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This barcode image demonstrates the same 5-degree skew as the front-side image of the license above. Barcodes printed close to the edge of the card — in this case, between 1/8 and 1/16 inch — may become truncated at this level of skew, although other barcodes printed closer to the center of the ID may remain readable if corrected with software. |
