Card image scanning instructions
In order to scan card images, please read the following instructions carefully.
- Use a high-end scanner.
- Use cards in good condition, preferably Mint or Near Mint.
- Make sure the scanner's glass surface and the cards are clean. It is important that there's as little dust as possible.
- Make sure the cards are flat against the scanner glass. Some scanner lids aren't perfect and don't press on the cards enough.
- Scan as many cards you can fit at a time.
- Make sure to leave some space between the cards (including the border of the scanner), so that the card borders don't overlap.
- The alignment of the cards doesn't need to be perfect; the scans need to be edited anyway.
2. Scanner settings
- Scan between 600 and 1600 DPI. Higher DPI is better, but the file size to quality ratio is usually not worth it above 1600.
- Don't use settings such as (un)sharpening, descreening, dust removal, etc. It's generally better to do this when editing the images. If you intend on using a color profile, it's recommended to disable the color correction setting as well.
- Output as millions of colors, 24-bit color, or true color (they're all the same thing).
- In general, just do your best to make the scans look good. The text must also be easy to read.
- Save the scans as TIFF, PNG (>= 24-bit), or any other lossless format.
- Make sure you use the same settings for all card scans.
3. Edit the images (optional)
- Each individual image must be saved as a separate file.
- The images must be oriented in portrait mode.
- Trim all surrounding whitespace or transparency from the images.
- Pokémon cards are exactly 6.3cm by 8.8cm with an aspect ratio of 0.716. Try to approximate this aspect ratio as close as possible.
- Clean up the images as much as possible. This includes touching up the card borders, applying various filters (such as descreening), etc.
- Use transparency for the rounded borders of the cards if possible. Otherwise, make the background white.
- The image width must be at least 640px. Higher widths up to 1280px are preferred.
- Save the images in a lossless format (>= 24-bit) such as PNG or WebP.
- File size isn't important because the images will be optimized before they are uploaded to database anyway.
- Create a folder for each expansion you scanned cards for, and use the card numbers (or card number sorting orders) as file names, e.g., base-set/65-102.png, base-set/36-102.png, and 2005-energies/no-001.png. Conventions regarding file and folder names in general can be found here.