Question 1

What is PPM format?

Accepted Answer

PPM (Portable Pixmap) is a simple uncompressed image format from the Netpbm toolkit. It stores raw RGB pixel data with a minimal header. Used in scientific computing, image processing pipelines, and Unix/Linux tools.

Question 2

Does rotation affect image quality?

Accepted Answer

90°, 180°, and 270° rotations are pixel-perfect. Custom angles require resampling with minimal quality impact.

Question 3

Can I compress while rotating?

Accepted Answer

Yes. Under "Image Compression," choose any method. Since PPM is uncompressed, even "Quality Preset: High" will produce a significantly smaller file.

Question 4

Can I also resize while rotating?

Accepted Answer

Yes. Under "Image resolution," set by percentage or keep original. Useful for reducing large scientific images.

Question 5

Should I rotate as PPM or convert to PNG?

Accepted Answer

For continued use in image processing pipelines, keep PPM. For general use, PPM to PNG gives lossless compression at much smaller file sizes.

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