Hasselblad 3FR to QOI: conversion guide

Source · Hasselblad 3FR
Target · QOI

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What happens when you convert Hasselblad 3FR to QOI?

RAW development

Hasselblad 3FR needs camera- and file-aware development to produce a rendered QOI image. White balance, exposure, camera colour interpretation and, where applicable, demosaicing determine that rendering. The destination does not retain the original RAW development latitude. No development settings or camera support are implemented yet.

Transparency

The target can store an alpha channel, but converting an opaque image does not create transparent areas. Removing a background is a separate editing step.

Lossless sample storage

QOI preserves 8-bit RGB/RGBA samples losslessly. Reducing 16-bit data or discarding profiles and metadata before encoding is outside that guarantee. QOI can store its supported image samples without lossy compression. This applies after rendering and sample conversion: it does not guarantee preservation of source precision, colour space or document structure, and cannot undo earlier losses.

8-bit destination samples

The reviewed QOI representation uses 8-bit colour samples. If the source contains higher-precision samples, they must be reduced before encoding, even in a lossless output mode. Rounding, dithering and colour conversion are future engine decisions; lost precision cannot be recovered from this output.

Hasselblad 3FR

Source

Hasselblad 3FR

Hasselblad 3FR Raw

Compression: Depends on variantTransparency: NoMetadata: Capture metadata

Hasselblad native raw capture, developed in a compatible medium-format workflow.

Explore Hasselblad 3FR format →
QOI

Target

QOI

Quite OK Image Format

Compression: LosslessTransparency: YesMetadata: Colour-space flag

A small lossless codec for 8-bit RGB and RGBA images, designed for simple, fast implementations.

Explore QOI format →

Is Hasselblad 3FR → QOI right for you?

Good choice when

  • QOI fits your delivery use: Application assets & simple decoding.
  • You need a developed image for a non-RAW application.
  • You need lossless storage of the rendered samples supported by QOI.
  • 8-bit colour is sufficient for your destination.
  • You need a QOI-compatible workflow that can hold transparency added in a separate edit.

Probably not when

  • You need the original sensor data and freedom to redevelop it.
  • You expect lossless encoding to restore lost details or editing structure.
  • You need higher-precision samples for grading or measurement.
  • You require identical samples without a defined colour and precision policy.
  • You expect automatic background removal or transparency.

Hasselblad 3FR to QOI conversion details

RAW development
Hasselblad 3FR needs camera- and file-aware development to produce a rendered QOI image. White balance, exposure, camera colour interpretation and, where applicable, demosaicing determine that rendering. The destination does not retain the original RAW development latitude. No development settings or camera support are implemented yet.
Transparency
The target can store an alpha channel, but converting an opaque image does not create transparent areas. Removing a background is a separate editing step.
Lossless sample storage
QOI preserves 8-bit RGB/RGBA samples losslessly. Reducing 16-bit data or discarding profiles and metadata before encoding is outside that guarantee. QOI can store its supported image samples without lossy compression. This applies after rendering and sample conversion: it does not guarantee preservation of source precision, colour space or document structure, and cannot undo earlier losses.
8-bit destination samples
The reviewed QOI representation uses 8-bit colour samples. If the source contains higher-precision samples, they must be reduced before encoding, even in a lossless output mode. Rounding, dithering and colour conversion are future engine decisions; lost precision cannot be recovered from this output.
Sample precision & colour
Source and target sample models can differ in precision, channel layout, colour space and transfer function. Lossless compression only preserves the samples actually encoded; a precision reduction or colour conversion can already change them. The future engine defines numeric mapping, orientation and colour conversion; canonical depth facts are listed below where available.
Metadata & colour
Format support does not guarantee that an export preserves metadata or colour profiles. Retention and colour handling depend on the future converter; its engine is not implemented yet.
Compression
Hasselblad 3FR: Depends on variant → QOI: Lossless Hasselblad 3FR: Hasselblad’s H6D guide distinguishes 3FR captures from FFF files produced in its processing workflow. That relationship is not just a suffix rename. Sensor precision and processing behaviour depend on the model and software; avoid assigning one universal sample depth to every 3FR. QOI: QOI preserves 8-bit RGB/RGBA samples losslessly. Reducing 16-bit data or discarding profiles and metadata before encoding is outside that guarantee.
Transparency
Hasselblad 3FR: No → QOI: Yes
Colour depth
Hasselblad 3FR: Camera and recording mode → QOI: 8 bits/sample
Sensor data
Hasselblad 3FR: Raw development required
Dimensions
Pixel dimensions, page geometry, rendering resolution, resizing and orientation need explicit converter policies. The future engine has not defined them yet.
Metadata
Hasselblad 3FR: Capture metadata → QOI: Colour-space flag. Which fields are copied, rewritten or omitted will depend on the future engine; retention is not implemented yet.

Common questions

Will QOI still be an editable camera RAW?

Hasselblad 3FR needs camera- and file-aware development to produce a rendered QOI image. White balance, exposure, camera colour interpretation and, where applicable, demosaicing determine that rendering. The destination does not retain the original RAW development latitude. No development settings or camera support are implemented yet.

Will the background become transparent?

The target can store an alpha channel, but converting an opaque image does not create transparent areas. Removing a background is a separate editing step.

Does lossless output mean an unchanged source?

QOI preserves 8-bit RGB/RGBA samples losslessly. Reducing 16-bit data or discarding profiles and metadata before encoding is outside that guarantee. QOI can store its supported image samples without lossy compression. This applies after rendering and sample conversion: it does not guarantee preservation of source precision, colour space or document structure, and cannot undo earlier losses.

Are bit depth and colour values guaranteed to match?

Source and target sample models can differ in precision, channel layout, colour space and transfer function. Lossless compression only preserves the samples actually encoded; a precision reduction or colour conversion can already change them. The future engine defines numeric mapping, orientation and colour conversion; canonical depth facts are listed below where available.

Will metadata and colour profiles be retained?

Hasselblad 3FR: Capture metadata → QOI: Colour-space flag. Which fields are copied, rewritten or omitted will depend on the future engine; retention is not implemented yet.