How to remove scan lines in Photoshop

To remove scan lines in Photoshop, first work out what kind of lines you have. Then use the matching tool. Thin, straight streaks can be selected and filled, or painted out with the Spot Healing Brush and Clone Stamp. Fine, scattered texture responds to noise filters such as Dust & Scratches or Median. Halftone dots and moiré patterns need a controlled blur followed by a Levels or Threshold adjustment. For logo work, the goal is not a perfect photograph. The goal is a clean raster reference with crisp, solid shapes that you can trace or redraw as vector artwork.

Some terms used in this guide:
• Raster image: a grid of pixels. Scans and Photoshop files are raster images.
• Vector artwork: shapes defined by mathematical paths. It scales without losing quality.
• Path: a line or curve made of anchor points, which are the points that control where the path bends.
• Tracing: converting the shapes in a raster image into vector paths, either automatically or by redrawing them by hand.
Photoshop cleans the raster scan. The vector reconstruction usually happens afterward, in a vector application.

Identify the type of scan line before editing

Different artifacts need different fixes. If you apply the wrong filter, you can soften logo edges without removing the problem. Zoom to 100% and compare the scan against these common patterns.

Artifact | What it looks like | Likely cause | Best first fix

Scanner streaks | Straight lines running the full length or width of the scan, often in the same position on every scan | Dust or marks on the scanner glass or sensor | Clean the glass and rescan; otherwise select and fill, or retouch

Scattered specks and scratches | Random dots, hairs or short marks | Dust on the print or glass, paper texture | Dust & Scratches, Despeckle or Spot Healing Brush

Halftone dots | A regular dot grid inside solid colour areas | The original was printed with a halftone screen | Scanner descreen option, or blur followed by Levels or Threshold

Moiré | Wavy or checkered interference patterns | The halftone screen interacting with the scanner resolution | Rescan with descreening, or blur followed by Levels or Threshold

Banding | Broad stripes of slightly different tone | Uneven scanner lighting or sensor response | Levels or Curves on the affected area, or rescan

A quick diagnostic: rotate the print 90 degrees on the scanner glass and scan it again. If the lines keep the same direction relative to the scanner, the scanner is the cause. Clean the glass or use a different scanner. If the lines rotate along with the print, they are part of the printed original, and you need to retouch them.

Starting conditions

Use the best scan you can get. A clean rescan almost always beats retouching. Clean the glass, keep the print flat, and use your scanner software's descreen setting if the original is a printed piece.
Scan at a high enough resolution that the logo's smallest details, such as thin strokes and small lettering, stay clearly defined. There is no single correct value. If you plan to trace, err toward more pixels rather than fewer.
Work on a copy of the scan and keep the original file untouched.
Confirm that you have permission to reproduce and redraw the logo. Owning a scan or a file does not grant reuse rights.
Check your Photoshop version. The commands below are long-standing Photoshop features, but menu locations and some options, especially Content-Aware Fill, differ between versions. Verify each one in your copy.

Step-by-step: removing scan lines from a logo scan

1. Prepare the document

Open the scan and duplicate the background layer, so you can always compare against the original.
If the logo is a single colour, convert to grayscale with Image > Mode > Grayscale. This removes colour noise that can make lines harder to isolate. For multicolour logos, stay in RGB.
Straighten and crop the scan first. You can use the Crop tool's straighten option or Image > Image Rotation > Arbitrary. That way, horizontal scan lines run truly horizontal, which makes them easier to select.
Optionally, convert the working layer with Filter > Convert for Smart Filters. Filters you apply afterward stay editable and can be adjusted or removed later.

2. Remove straight streaks

For a line one pixel wide that runs across the whole image, choose the Single Row Marquee tool (or Single Column Marquee for vertical lines) and click directly on the line.
To cover a slightly wider line, expand the selection with Select > Modify > Expand.
Fill the selection from the surrounding pixels with Edit > Fill and Content-Aware as the contents, or with Edit > Content-Aware Fill in versions that include it. On a plain white background, you can simply fill with white.
Where a streak crosses the logo itself, retouch that section separately. The Clone Stamp tool gives the most control along edges. Sample from the same edge just above or below the line, so the edge stays continuous.
For short or broken streaks, paint along them with the Spot Healing Brush. Hold Shift and click to paint in straight lines.

3. Reduce specks, scratches and fine texture

Try Filter > Noise > Despeckle first. It is mild and keeps edges sharper than most other options.
For more stubborn marks, use Filter > Noise > Dust & Scratches. Start with a low Radius and a low Threshold. Raise the Radius only until the marks disappear, then raise the Threshold to bring back edge detail. If logo edges start rounding off, back off.
Filter > Noise > Median smooths texture more aggressively. It is useful inside large solid areas, but it rounds corners, so limit it to a selection that excludes fine detail.
To affect only background areas, select the logo first, for example with Select > Color Range or Select > Subject in recent versions. Then invert the selection before filtering.

4. Remove halftone dots and moiré

Apply Filter > Blur > Gaussian Blur at the smallest radius that makes the dot pattern merge into an even tone.
Restore crisp edges with Image > Adjustments > Levels. Move the black and white input sliders toward each other until the solid areas are solid and the edges are clean. For single-colour logos, Image > Adjustments > Threshold produces pure black and white. Adjust its slider while watching thin strokes and small counters, the enclosed spaces inside letters such as e, o and a.
For a multicolour logo, work on one colour at a time. Select it with Select > Color Range, then clean or fill each colour area on its own layer.
Third-party descreening and frequency-domain (FFT) plug-ins exist for severe patterns. They are not part of Photoshop itself, so their availability and settings depend on the plug-in you use.

5. Fix banding and uneven tone

Where broad stripes of tone remain, select the affected band and use a Levels or Curves adjustment layer to match it to the surrounding area. Once solid areas are flattened to pure colour or pure black, mild banding usually disappears. For tracing purposes, the remaining tonal differences do not matter.

Handling lettering in the logo

Scan lines and filters both distort letter edges. Do not spend long perfecting text in Photoshop. Try to identify the typeface instead. If the font is known and you have the right to use it, setting the text in a vector application and converting it to outlines gives cleaner letterforms than tracing a damaged scan. If the lettering is custom or modified, clean it only enough to show the true letter shapes clearly, then redraw it by hand. In both cases, compare against the original print, not the retouched scan, for details such as stroke contrast and terminal shapes.

Check the result

View at 100% and at higher zoom levels. No streaks, dots or specks should remain in the background or inside solid areas.
Toggle the original layer on and off. Edges, corners and thin strokes should match the original shapes, not rounder or thinner versions of them.
Add a temporary Threshold adjustment layer above everything as a preview. Any remaining lines or speckle will show up as stray black or white pixels. Delete the preview when you are done.
Check the counters and gaps between letters. Filtering can close small openings.
Run a test trace. Any stray pixels left in the image will turn into unwanted anchor points or small extra shapes in the trace.

Export for tracing or redrawing

Save a layered PSD as your editable master.
Export a flattened copy in a lossless format such as PNG or TIFF for tracing. Avoid JPEG, because its compression adds new artifacts around edges.
Keep the cleaned file at full resolution. Downsizing before tracing loses detail.
Place the file in your vector application. Then either trace it automatically, for example with Image Trace in Illustrator, or use it as a locked template layer and redraw the logo with the Pen tool. Manual redrawing usually produces fewer anchor points and smoother curves.

Photoshop's output here is still a raster file. The vector logo only exists once the shapes have been rebuilt as paths. Before delivery, inspect the final file in outline view. Saving a file as AI, EPS, PDF or SVG does not prove it contains vector paths, because these formats can also hold embedded pixel images. The file format also says nothing about whether you have permission to reuse the logo.

Limits of this guide

No specific filter values are given above because the right settings depend on scan resolution, logo detail and artifact severity. Increase settings gradually and judge by eye. Menu paths reflect long-standing Photoshop commands, but they can move or change between versions, so check them against your installed version. If a print is badly damaged, retouching may only recover approximate shapes. In that case, redrawing from the best available reference, or sourcing original artwork from the logo owner, is the more reliable route.