My MATLAB figure exports at 150 DPI and the journal requires 300 DPI. Will this fix the submission rejection?

If the pixel dimensions of your MATLAB export are sufficient for the figure's printed size at 300 DPI, correcting the tag with Deliteful will resolve the metadata mismatch. Calculate whether your pixel count divided by 300 gives you the required figure width in inches.

Does correcting DPI metadata count as image manipulation under journal policies?

No. DPI metadata adjustment does not alter pixel values, contrast, brightness, or any scientific content of the image. It changes only the print size interpretation tag. This is not considered image manipulation by major publishers.

What DPI do most journals require for microscopy or gel images?

Most biomedical journals require 300 DPI for grayscale and color photographs including microscopy, and 600 DPI for figures combining photos with line art. Consult the specific journal's author guidelines, as requirements vary.

Does Deliteful support TIFF, which many journals recommend for figures?

Currently Deliteful supports PNG, JPEG, and WebP. If your journal requires TIFF, export as PNG first — PNG is lossless and widely accepted as equivalent to TIFF for most figure submissions.

Meet Journal DPI Requirements for Manuscript Figures Without Resampling

Journal submission portals routinely reject manuscript figures for insufficient DPI — even when the underlying image data is high quality — because screen-export workflows tag files at 72 or 96 DPI by default. Deliteful corrects DPI metadata on your figures, plates, and micrographs to meet publisher specifications without resampling or degrading image data.

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Academic publishers including Elsevier, Springer, and Wiley specify DPI requirements that vary by figure type: 300 DPI for color and grayscale photographs, 600 DPI for combination figures, and 1000 DPI for line art in many style guides. Figures exported from analysis software (MATLAB, R, ImageJ, Python matplotlib) or presentation tools frequently carry incorrect DPI tags that trigger automated rejection at the manuscript submission portal — a frustrating delay when a paper is otherwise submission-ready. The pixel data in these exports is typically adequate; only the metadata tag is wrong.

Deliteful supports PNG, JPEG, and WebP format corrections up to 2400 DPI, covering all standard academic publisher requirements including the 1000 DPI threshold for line art. Because it is a metadata-only operation, it does not alter the data integrity of microscopy images, plots, or scientific figures — a meaningful concern when submitting to journals with image manipulation policies.

How it works

1
Check the journal's figure preparation guidelines
Identify the required DPI for each figure type — color photos, line art, and combination figures typically have different requirements.
2
Export figures from your analysis or presentation software
Use your standard export workflow; the DPI setting in the export dialog is what Deliteful will correct.
3
Upload to Deliteful
Add the PNG or JPEG figure files that need DPI correction.
4
Set the target DPI per figure type
Run separate batches if different figures require different DPI values — 300, 600, or 1000 DPI as the journal requires.
5
Re-upload corrected figures to the submission portal
Download and replace the rejected figures in your manuscript submission package.

Frequently asked questions

My MATLAB figure exports at 150 DPI and the journal requires 300 DPI. Will this fix the submission rejection?: If the pixel dimensions of your MATLAB export are sufficient for the figure's printed size at 300 DPI, correcting the tag with Deliteful will resolve the metadata mismatch. Calculate whether your pixel count divided by 300 gives you the required figure width in inches.
Does correcting DPI metadata count as image manipulation under journal policies?: No. DPI metadata adjustment does not alter pixel values, contrast, brightness, or any scientific content of the image. It changes only the print size interpretation tag. This is not considered image manipulation by major publishers.
What DPI do most journals require for microscopy or gel images?: Most biomedical journals require 300 DPI for grayscale and color photographs including microscopy, and 600 DPI for figures combining photos with line art. Consult the specific journal's author guidelines, as requirements vary.
Does Deliteful support TIFF, which many journals recommend for figures?: Currently Deliteful supports PNG, JPEG, and WebP. If your journal requires TIFF, export as PNG first — PNG is lossless and widely accepted as equivalent to TIFF for most figure submissions.