Card Scan Best Practices for Scan & Identify

We’ve designed Scan & Identify to be fairly adaptable, allowing a wide range of images to be used as scan input. However, certain factors can affect the accuracy of card identification, so we recommend considering a few key guidelines before uploading your images to Scan & Identify. If you’re using a scanner, like the Ricoh fi8170, these settings are typically available as configurable options within the software that came with the scanner (e.g. Ricoh PaperStream ClickScan).

 

Image Size

We recommend that images are a minimum of 300x400 pixels. Images smaller than this cannot be imported because they may not perform well with Roca Vision.

 

DPI

We recommend images that are at least 72 dpi. DPI greater than 100 is unlikely to improve recognition but will increase the file size. If you’re limited on drive space and have a large number of images, we recommend a DPI of 72-100.

 

File Type

We accept both JPEG and PNG file formats. We recommend JPEG images with minimal (>=50% quality) compression, as these take up less drive space than their PNG counterparts.

 

How to Determine Image File Properties

If you already have images captured and aren’t sure if they meet the above criteria, here are some quick tips to find out if they do:

 

On a Mac

If you’re using a Mac, the easiest way to check (and change) your images is using Preview. To open Inspector, right-click on an image file and select Open With → Preview.

Once in Preview, go to Tools → Show Inspector (or hit ⌘I).

 

In the Inspector window, you can see the file type, image size and DPI.

 

On a Windows PC (Windows 10 or later)

Open Windows Explorer and find the image you want to check. The dimensions and file size appear in the right-hand details pane.

 

If you do not see this, click the View ribbon tab and then Details Pane:

 

You can also right-click on an image & choose properties from the drop-down menu.
A new window will appear with several tabs. You'll click the details tab, and there you'll find your image size and dimensions.

 

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