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What is IIQ?

Phase One IIQ is a professional medium-format raw format used by Phase One digital backs, delivering exceptional image quality for commercial photography.

What is PGM?

Portable GrayMap (PGM) is a simple grayscale image format, storing each pixel as a grayscale value in ASCII or binary form.

When Should You Use IIQ vs PGM?

Use IIQ When...

Reach for IIQ when your priority is professional studio photography, digital back capture — its uncompromising quality ensures every detail is preserved.

Use PGM When...

Reach for PGM when your priority is grayscale image processing, scientific data — its uncompromising quality ensures every detail is preserved.

IIQ vs PGM: Key Differences

  • •IIQ uses lossless compression while PGM uses lossless compression — both take the same approach to file size management.
  • •Since both IIQ and PGM use lossless compression, the quality characteristics are comparable — differences in file size come down to how efficiently each format implements compression.
  • •Transparency: N/A
  • •File sizes: IIQ files typically range 50-150MB per image from medium-format backs and PGM files Compact for grayscale images.
  • •Primary audience: IIQ is built for professional studio photography, digital back capture scenarios, while PGM focuses on grayscale image processing, scientific data — pick the format that matches your output requirement.

Advantages of IIQ

  • ✓IIQ uses lossless compression tailored for Professional studio photography, digital back capture.
  • ✓IIQ is supported natively on virtually every device, browser, and operating system.
  • ✓IIQ files are bit-for-bit perfect, preserving every pixel and sample for professional work.
  • ✓IIQ integrates seamlessly with all major photo editing tools and workflows.

Advantages of PGM

  • ✓PGM uses lossless compression tailored for Grayscale image processing, scientific data.
  • ✓PGM is supported natively on virtually every device, browser, and operating system.
  • ✓PGM files are bit-for-bit perfect, preserving every pixel and sample for professional work.
  • ✓PGM integrates seamlessly with all major creative tools and workflows.

Common Use Cases for IIQ to PGM Conversion

  • Email marketing campaigns
  • Presentation graphics
  • Blog and article illustrations
  • Mobile app UI assets
  • Product photography for marketplaces
  • Digital art portfolios

Industry Applications

Digital ArtUI/UX DesignAdvertisingBrand ManagementContent ManagementMedical Imaging

Best Practices for IIQ to PGM Conversion

  • →Before converting IIQ to PGM, decide whether you need maximum quality or smallest file size — this determines which format truly fits
  • →Save a master copy in a lossless format before converting to PGM — you cannot recover detail lost during lossy compression
  • →Check the color profile: IIQ images may use a wider gamut than PGM supports, causing a visible shift after conversion
  • →Resize images to the final display dimensions before converting — this avoids unnecessary processing of oversized files
  • →Run a single test conversion first to verify quality meets your standards
  • →Strip unnecessary metadata to reduce file size after conversion

Related Article

JPG vs PNG vs WebP: Which Image Format Should You Use?

Learn more about IIQ and PGM formats in our detailed guide.

Troubleshooting IIQ to PGM Conversion

  • !Converting IIQ to PGM gives blurry output → increase the quality setting before conversion
  • !Colors look different in PGM than IIQ → check color profile mismatch (sRGB vs Adobe RGB)
  • !File size changed more than expected → PGM uses different compression, file size differences of 2-5x are normal
  • !Transparent areas in IIQ turned white in PGM → PGM may not support transparency

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Convert IIQ to PGM Online - Free & Fast

Convert IIQ files to PGM online for free. High-quality conversion with no registration required.

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About IIQ and PGM

IIQ

IIQ (Phase One IIQ raw) - Phase One IIQ, raw format from Phase One medium-format cameras. Best for professional studio photography, digital back capture.

PGM

PGM (PGM graymaps) - Portable GrayMap, grayscale ASCII/PGM image format. Ideal for grayscale image processing, scientific data.

Format Comparison

CompressionLossless → Lossless
TransparencySupported
Use CaseConvert from professional studio photography, digital back capture to grayscale image processing, scientific data
File Size~Compact for grayscale images after conversion

FAQs

Is converting IIQ to PGM free?

Yes, GoConvertFile offers free conversion of IIQ to PGM for files up to 100MB. No registration required.

How long does it take to convert IIQ to PGM?

Most IIQ to PGM conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.

What is PGM best used for?

PGM is ideal for grayscale image processing, scientific data. Portable GrayMap, grayscale ASCII/PGM image format

What file size should I expect after converting IIQ to PGM?

File size after IIQ to PGM conversion depends on the content complexity and quality settings. Both formats use similar compression approaches so sizes are comparable.

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