Best Resolution for Scanning Old Photos: 300, 600, or 1200 DPI?

If you're preparing old photos for AI restoration, the scanning resolution you choose has a significant impact on the quality of results you'll get. Too low a resolution and important detail is lost before the AI even sees the image; unnecessarily high resolution creates huge files that slow down uploads and processing without meaningful quality gain. Here's the practical guide to getting the scanning decision right.

Understanding DPI: What It Actually Means

DPI stands for 'dots per inch' — it describes how many pixels of information are captured per inch of the physical photograph. A 4×6 inch photo scanned at 300 DPI produces an image that's 1200×1800 pixels (about 2 megapixels). The same photo at 600 DPI is 2400×3600 pixels (about 9 megapixels), and at 1200 DPI it's 4800×7200 pixels (about 35 megapixels). More pixels means more detail captured, but also larger files and slower uploads.

The Right DPI for Each Use Case

For photos you only need at their original size (a 4×6 print that will be displayed at 4×6), 300 DPI is technically sufficient for print quality. For photos you may want to enlarge — a small 2×3 inch snapshot that you'd love to print at 8×10 — scan at 600 DPI minimum, since the enlargement will be visible at lower resolution. For AI restoration specifically, 600 DPI is the sweet spot for most photos: it captures enough detail for the AI to work with without creating impractically large files. Tiny photos (wallet-size, locket miniatures) benefit from 1200 DPI because the subject is so small.

Practical Scanning Tips

Clean both the scanner glass and the photo surface before scanning — a dust spec at 600 DPI appears as a noticeable artifact. Scan to TIFF format rather than JPEG when possible; JPEG compression discards detail in ways that can confuse restoration AI. If you're scanning a large batch and storage space is a concern, JPEG at quality 95+ is an acceptable compromise. For photos with significant physical damage (deep creases, missing pieces), a flatbed scanner with a lid that can be left fully open accommodates photos that can't be pressed flat, though you'll need to ensure even lighting.

Practical Steps to Get Started

Before uploading your photo, take a moment to gently clean the surface with a soft, dry cloth to remove loose dust or debris. Scan at the highest resolution your equipment allows — 600 DPI is a solid baseline, but 1200 DPI or higher yields noticeably better restoration results. Save the scan as a TIFF or PNG rather than JPEG to preserve every detail.

Once you have a clean digital copy, visit PhotoFix and upload your image. The AI analyzes each pixel in context, identifying which degradation patterns to correct while preserving the authentic character of the original. Within seconds you'll see a preview of the restored version, and you can download the full-resolution result ready for printing or sharing.

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