Any2Any Pics

HDR to HEIF: conversion guide

Source · HDR
Target · HEIF

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What happens when you convert HDR to HEIF?

HDR display encoding

The source can carry HDR information and HEIF has HDR-capable variants. Working radiometric values and display-referred HDR are different representations. Range, primaries, transfer function and signalling must be mapped explicitly; the future engine may instead produce SDR. HDR preservation is not promised by format support.

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.

Encoding mode

HEIF defines the container. Compression may be lossy, lossless or uncompressed depending on its codec binding; one global quality or bit-depth value would be misleading. HEIF permits different encoding modes or container representations. Its format name alone does not promise lossless output, a quality setting or a size reduction. The future engine must choose a supported codec and sample representation; inspect the target’s compression notes below.

HDR

Source

HDR

Radiance HDR / RGBE

Compression: LosslessTransparency: NoMetadata: Radiance header, EXPOSURE, FORMAT

Radiance pictures with a shared exponent for high-dynamic-range lighting values.

Explore HDR format →
HEIF

Target

HEIF

High Efficiency Image File Format

Compression: Depends on variantTransparency: YesMetadata: Exif, XMP, ICC, NCLX

An image container for individual pictures, collections and sequences. The codec inside determines compression.

Explore HEIF format →

Is HDR → HEIF right for you?

Good choice when

  • HEIF fits your delivery use: Device photography & image collections.
  • You need HDR-capable delivery and can validate its encoding and colour signalling.
  • Your receiving application supports the required HEIF variant.
  • You can validate the destination’s sample precision and colour interpretation.
  • You need a HEIF-compatible workflow that can hold transparency added in a separate edit.

Probably not when

  • You require guaranteed scene-linear values or HDR appearance.
  • You need a guaranteed quality or file size before encoder settings exist.
  • You require identical samples without a defined colour and precision policy.
  • You expect automatic background removal or transparency.

HDR to HEIF conversion details

HDR display encoding
The source can carry HDR information and HEIF has HDR-capable variants. Working radiometric values and display-referred HDR are different representations. Range, primaries, transfer function and signalling must be mapped explicitly; the future engine may instead produce SDR. HDR preservation is not promised by format support.
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.
Encoding mode
HEIF defines the container. Compression may be lossy, lossless or uncompressed depending on its codec binding; one global quality or bit-depth value would be misleading. HEIF permits different encoding modes or container representations. Its format name alone does not promise lossless output, a quality setting or a size reduction. The future engine must choose a supported codec and sample representation; inspect the target’s compression notes below.
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
HDR: Lossless → HEIF: Depends on variant HDR: RLE preserves stored RGBE bytes; RGBE quantization is not exact storage of arbitrary float RGB. The .hdr format is distinct from the general concept of HDR photography. HEIF: HEIF defines the container. Compression may be lossy, lossless or uncompressed depending on its codec binding; one global quality or bit-depth value would be misleading.
Transparency
HDR: No → HEIF: Yes
Animation
HDR: No → HEIF: Yes
Colour depth
HDR: 32-bit RGBE / XYZE pixel → HEIF: Codec/profile dependent
HDR
HDR: Radiometric values → HEIF: Codec/profile dependent
Multiple images
HEIF: Collections & sequences
Dimensions
Pixel dimensions, page geometry, rendering resolution, resizing and orientation need explicit converter policies. The future engine has not defined them yet.
Metadata
HDR: Radiance header, EXPOSURE, FORMAT → HEIF: Exif, XMP, ICC, NCLX. Which fields are copied, rewritten or omitted will depend on the future engine; retention is not implemented yet.

Common questions

Will HDR automatically survive in HEIF?

The source can carry HDR information and HEIF has HDR-capable variants. Working radiometric values and display-referred HDR are different representations. Range, primaries, transfer function and signalling must be mapped explicitly; the future engine may instead produce SDR. HDR preservation is not promised by format support.

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.

Which compression mode will HEIF use?

HEIF defines the container. Compression may be lossy, lossless or uncompressed depending on its codec binding; one global quality or bit-depth value would be misleading. HEIF permits different encoding modes or container representations. Its format name alone does not promise lossless output, a quality setting or a size reduction. The future engine must choose a supported codec and sample representation; inspect the target’s compression notes below.

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?

HDR: Radiance header, EXPOSURE, FORMAT → HEIF: Exif, XMP, ICC, NCLX. Which fields are copied, rewritten or omitted will depend on the future engine; retention is not implemented yet.

Explore related HDR and HEIF conversions.

Other targets for HDR

HDR→EXR
HDR → EXR
HDR→TIFF
HDR → TIFFWith caveat
HDR→AVIF
HDR → AVIFWith caveat

Other sources for HEIF

HEIC→HEIF
HEIC → HEIF
JPEG→HEIF
JPEG → HEIF
AVIF→HEIF
AVIF → HEIF