How to Convert Images to Meet Journal Figure Requirements [2026 Guide]
Your paper got rejected because the figures didn't meet technical requirements? You're not alone. Every year, thousands of manuscripts are returned to authors due to image resolution, format, or size issues.
This comprehensive guide explains exactly what journals require and shows you how to convert your images to meet those standards—even if your original files are low resolution.
Understanding Journal Figure Requirements
The Three Critical Specifications
| Requirement | What It Means | Typical Standard |
|---|---|---|
| Resolution (DPI) | Dots per inch | 300-1200 DPI |
| Format | File type | TIFF, PNG, EPS, PDF |
| Dimensions | Physical size | 83mm (single column) to 170mm (full page) |
DPI Requirements by Image Type
Different types of figures require different resolutions:
| Figure Type | Required DPI | Example |
|---|---|---|
| Photographs / Halftones | 300 DPI minimum | Microscopy images, gels, blots |
| Line Art | 600-1200 DPI | Graphs, charts, diagrams |
| Combination | 500-900 DPI | Photos with text overlays |
Why the difference? Line art contains sharp edges and thin lines that become jagged (aliased) at lower resolutions. Photographs are more forgiving because they consist of continuous tones.
What Each Major Journal Requires
Nature Publishing Group
- Format: TIFF, EPS, or PDF preferred
- Resolution: 300 DPI (photos), 600 DPI (line art)
- Color: RGB for online, CMYK for print
- Max file size: 20 MB per figure
Science (AAAS)
- Format: TIFF or EPS
- Resolution: 300 DPI minimum, 1200 DPI for line art
- Width: 5.5 cm (single column) or 12 cm (double column)
Cell Press
- Format: TIFF, EPS, PDF
- Resolution: 300 DPI minimum
- Critical: No JPEG compression artifacts
Elsevier Journals
- Format: TIFF or EPS preferred
- Resolution: 300 DPI (halftones), 1000 DPI (line art)
- Color mode: RGB
Wiley Journals
- Format: TIFF, EPS, or high-resolution PDF
- Resolution: 300 DPI minimum
- Max file size: 10 MB per figure
The Problem: Your Images Are Too Small
Here's the common scenario:
- You created figures in PowerPoint at 96 DPI
- Or exported from Python/R/MATLAB at screen resolution
- Or used screenshots from software
When you check the resolution, you find your 800×600 pixel image is only 2.67 inches at 300 DPI—far too small for publication.
Can You Just Change the DPI Setting?
No. Simply changing the DPI metadata from 96 to 300 doesn't add any new pixels. Your image will print at the correct DPI, but it will be tiny (about 1/3 the size).
The math:
- 800 pixels ÷ 300 DPI = 2.67 inches
- 800 pixels ÷ 600 DPI = 1.33 inches (even smaller!)
You need more pixels, not just a higher DPI number.
The Solution: AI Super-Resolution + Format Conversion
Modern AI upscaling technology can intelligently add pixels to your images, creating genuinely higher-resolution versions that pass journal requirements.
What AI Upscaling Does
| Traditional Upscaling | AI Upscaling |
|---|---|
| Blurs edges | Sharpens edges |
| Creates blocky artifacts | Reconstructs detail |
| Looks worse when enlarged | Looks better than original |
Recommended Workflow
- Check current resolution → Identify the gap
- AI upscale → Increase pixel dimensions 2-4x
- Convert format → TIFF or PNG (no JPEG!)
- Verify → Confirm DPI and dimensions
Step-by-Step Tutorial: Convert Images Using SciDraw
Step 1: Upload Your Figure
Go to SciDraw Convert Tool and upload your image:
- Supported formats: PNG, JPG, WebP
- Max file size: 10 MB
Step 2: Choose Output Format
Select your target format based on journal requirements:
| Format | Best For | Compression |
|---|---|---|
| TIFF | Print publication, archival | Lossless (LZW) |
| PNG | Online, transparency needed | Lossless |
| Multi-page figures | Vector-compatible |
Step 3: Select DPI/Resolution
Choose the appropriate resolution tier:
| Option | Output Resolution | Best For | Credits |
|---|---|---|---|
| 300 DPI | 1K (1024px) | Standard photographs | 5 |
| 600 DPI | 2K (2048px) | Detailed figures | 10 |
| 1000 DPI | 4K (4096px) | Line art, posters | 15 |
The tool automatically uses AI super-resolution if your original image is below the target resolution.
Step 4: Download and Submit
Your converted figure is now ready for journal submission:
- ✅ Correct resolution (300-1200 DPI)
- ✅ Proper format (TIFF with LZW compression)
- ✅ Lossless quality (no JPEG artifacts)
Quick Reference: DPI Conversion Table
Use this table to determine what resolution your image needs:
| Final Print Size | 300 DPI | 600 DPI | 1000 DPI |
|---|---|---|---|
| 3.5 inch (single column) | 1050 px | 2100 px | 3500 px |
| 5.5 inch (1.5 column) | 1650 px | 3300 px | 5500 px |
| 7 inch (full page) | 2100 px | 4200 px | 7000 px |
Formula: Required pixels = Print size (inches) × DPI
Common Mistakes to Avoid
❌ Using JPEG for Final Submission
JPEG compression creates artifacts around text and lines. Always use TIFF or PNG for final submission.
❌ Upscaling in Photoshop with "Bicubic"
Traditional upscaling methods blur your image. Use AI-powered upscaling for better results.
❌ Embedding Figures in Word Documents
Journals require separate figure files. Word compresses embedded images.
❌ Using Screenshots
Screenshots are typically 72-96 DPI. Always export from the source application at high resolution.
❌ Ignoring Color Mode
Some journals require CMYK for print. Check requirements before converting.
Frequently Asked Questions
Q: My figure was created in Python/R. How do I export at high resolution?
Python (matplotlib):
plt.savefig('figure.png', dpi=600, bbox_inches='tight')R (ggplot2):
ggsave("figure.png", dpi = 600, width = 7, height = 5)Q: What if I only have a low-resolution image?
Use an AI upscaling tool like SciDraw's converter. It can intelligently increase resolution by 2-4x while maintaining (or improving) image quality.
Q: Why do journals prefer TIFF over PNG?
TIFF supports:
- CMYK color mode (required for print)
- Multiple compression options
- Higher bit depth
- Industry-standard for publishing
PNG is acceptable for most journals but may require conversion for print.
Q: How do I check my image's current DPI?
Windows: Right-click → Properties → Details → Look for "Horizontal/Vertical resolution"
Mac: Open in Preview → Tools → Show Inspector → General tab
Online: Use an image metadata viewer
Ready to Convert Your Figures?
Stop getting papers returned for technical issues. Convert your images to meet journal requirements in seconds:
👉 Try SciDraw Image Converter — AI-powered upscaling + format conversion
Features:
- AI super-resolution (up to 4K)
- TIFF, PNG, PDF output
- 300, 600, 1000 DPI options
- LZW lossless compression
- Preview before download
SciDraw helps researchers create publication-ready scientific figures. From AI image generation to format conversion, we make scientific illustration effortless.
