How to Scan an Image at 300 DPI

The short answer

To scan an image at 300 DPI, open your scanner software, set the resolution (sometimes labeled DPI, PPI or quality) to 300, set the output scale to 100 percent, preview and crop to the artwork, then scan and save to a lossless format such as TIFF or PNG. Then open the file in an image editor and confirm two things: the resolution reads 300, and the pixel dimensions equal the original's physical size in inches multiplied by 300.

In scanning, DPI (dots per inch) means how many samples the scanner records across each inch of the original. Image editors usually call the same value PPI (pixels per inch). At 300 DPI, a logo printed 2 inches wide becomes a scan 600 pixels wide. The scan is a raster image, a fixed grid of pixels. For logo work it is a reference for redrawing, not the finished logo. The finished logo is a vector file: shapes defined by mathematical paths made of anchor points and curves, which can scale to any size without losing sharpness.

Before you scan

• Use the cleanest, flattest printed example of the logo you can find. Creases, smudges and faded ink all become edges you would have to judge or correct later.
• Clean the scanner glass with a lint-free cloth, because dust and hairs show up as specks along logo edges.
• Make sure you have the right to reproduce the logo. Scanning or redrawing a mark does not give you permission to reuse it.
• Find the resolution setting in your scanner software. Menu names and locations vary by manufacturer and version, and no application-specific evidence was available for this guide, so check your software's documentation if the setting is not obvious.

Step-by-step: scanning at 300 DPI

• 1. Place the print face down on the glass, square to the edges, and close the lid gently so the paper lies flat.
• 2. In the scanner software, choose a manual or professional mode if one is offered. Automatic modes may choose the resolution for you.
• 3. Set the resolution to 300. If the software lists output size and input size separately, keep the scale at 100 percent so 300 means 300 samples per inch of the original.
• 4. Choose the color mode. Use color if the logo has several colors or you need to match ink tones. Use grayscale for a one-color logo. Avoid the black-and-white (1-bit) mode: it converts every pixel to pure black or white at scan time, which discards the edge shading that helps you place curves accurately when redrawing.
• 5. Run a preview, then draw the scan area tightly around the logo, leaving a small margin.
• 6. Check the filters. If the logo was printed with halftone dots (the fine dot patterns used in offset printing), a descreen option can reduce the dot pattern and the moiré (wavy interference patterns) it can cause. Descreening also softens edges, so compare a scan with it on and one with it off. Leave heavy automatic sharpening off, because it can add halos around edges.
• 7. Scan, then save as TIFF or PNG. JPEG compression adds artifacts around high-contrast edges, which are exactly the areas you will trace.

How to confirm the scan is really 300 DPI

• Open the file in an image editor and view its image size or properties. The resolution should read 300 pixels per inch.
• Compare pixel dimensions with the original. Measure the printed logo, multiply its width and height in inches by 300, and check the result against the file. A 1.5-inch logo should be about 450 pixels across.
• View the image at 100 percent zoom. Edges should be clear enough to see where curves and corners turn, with no visible moiré, dust specks or glare.
• If the resolution reads correctly but the pixel dimensions are too small, the scan was probably downsampled or the scale setting was wrong. Rescan rather than raising the resolution number in an editor. Changing that number without resampling only changes the stated print size, and resampling up invents pixels instead of recovering detail.

Check | What to look for | If it fails

Resolution field | 300 pixels per inch | Re-check the resolution and scale settings and rescan

Pixel dimensions | Original size in inches × 300 | Confirm scale is 100 percent and the crop includes the whole logo

Edge quality at 100% zoom | Readable curves and corners, no dot pattern | Try descreen, a cleaner print, or a higher resolution

File format | TIFF or PNG | Re-save from the original scan, not from a JPEG copy

When 300 DPI is not enough for redrawing

300 DPI is a common reference resolution for print, but for a redraw what matters is how many pixels describe the logo's details. A logo printed very small, such as on a business card or a label, may produce a scan in which thin strokes, tight curves and small text are only a few pixels wide. In that case, scanning the same print at a higher resolution gives you more detail to trace. This is a working recommendation, not a fixed rule: choose the resolution at which the smallest important detail is clearly readable at 100 percent zoom. The resolution of your reference scan does not limit the final vector, which has no fixed resolution.

Using the scan to redraw the logo as a vector

• Place the scan in your vector application on its own layer, lock it, and lower its opacity so it acts as a template.
• Trace with the fewest anchor points that hold the shape. Put points at the extremes of curves and at corners, and let smooth curves run between them. Too many points cause lumpy curves and make later edits harder.
• Automatic tracing can give you a fast starting point, but check the result. It often follows scan noise and adds unnecessary points, so manual cleanup is usually needed. Trace options differ by application and version, so check your software's documentation.
• Identify the typeface instead of tracing letters by hand where you can. If a matching font is available and properly licensed, set the text with it, then compare it against the scan and adjust spacing as needed. Hand-traced lettering is usually needed only for custom or modified letterforms.
• Convert text to outlines in the delivery files so they display correctly without the font installed. Keep an editable copy with live text for future changes.
• Check the result in outline (wireframe) view. Look for stray points, overlapping duplicate shapes, open paths that should be closed, and leftover traces of the template.
• Export in the formats the job requires, commonly SVG for digital use and PDF or EPS for print. Open each export to confirm it contains vector paths rather than an embedded raster image. A file extension alone does not prove a file is vector-only.

Gaps in this guide

No version-specific documentation for scanner software or vector applications was available for this guide, so menu names, option labels and trace settings are described in general terms. No measured comparisons of scan resolutions or descreen results were available either. Treat the higher-resolution and descreen advice as recommendations to test on your own print, not documented requirements.