Jump to content

High Efficiency Image File Format

From Wikipedia, the free encyclopedia
(Redirected from .heif)
"HEIF" redirects here. For the Higher Education Innovation Fund, see Research England.
"heic" redirects here. For other uses, see HEIC.
High Efficiency Image File Format (HEIF)
Comparison of JPEG, JPEG 2000, JPEG XR and HEIF files at similar file sizes
Filename extension
.heif, .heifs; .heic, .heics; .avci, .avcs; .HIF
Internet media typeimage/heif, image/heif-sequence; image/heic, image/heic-sequence; image/avif
Uniform Type Identifier (UTI)public.heif, public.heic
Developed byMoving Picture Experts Group (MPEG)
Type of formatImage container
Extended fromISOBMFF
StandardISO/IEC 23008-12 (MPEG-H Part 12)
Open format?Depends on contained format (e.g. HEIC vs. free AV1 Image File Format)
Websitewww.iso.org/standard/83650.html Edit this at Wikidata

High Efficiency Image File Format (HEIF) is an international standard defined by MPEG-H Part 12 (ISO/IEC 3008-12), first published by the ISO in 2017. It is designed as a container for photographic images in any image encoding. HEIF is a special case of the general ISO BMFF format, in which all data is encapsulated in typed boxes, with a mandatory ftyp box that is used to indicate particular file types. The initial specification for HEIF provided usage details for three compression schemes: the widely supported JPEG encoding for still raster images and two video encodings that are also applicable to still image items, namely Advanced Video Coding (AVC, aka MPEG-4, Part 10 and H.264) and High Efficiency Video Coding (HEVC aka PEG-H Part 2 and H.265).

The ISO Base Media File Format official specification (of which HEIF is a special case) defines multiple subtypes in relations to possible encodings:

  • MJP2_FF, Motion JPEG 2000 File Format
  • MP4_FF_2, MPEG-4 File Format, version 2
  • MP4_FF_AVCE, MPEG-4 File Format for AVC (Extensions; Part 15)
  • JP2_FF, JPEG 2000 Part 1 (Core) jp2 File Format
  • JPX_FF, JPEG 2000 Part 2 (Extensions) jpf File Format
  • JPM_FF, JPEG 2000 Part 1 (Compound) jpm File Format
  • JPEG_XL, JPEG XL Image Encoding
  • JXL, JPEG XL File Format
  • HEIF, High Efficiency Image File Format. Some internal structures required for HEIF were added into the ISO_BMFF specification in a 2018 amendment. (ISO/IEC 14496-12:2015/Amd 2:2018)


BMFF HEIC/HEIX Registered Brands

Specific implementations of HEIF encoding are registered by MP4RA and are officially called "brands".

According to official specifications, the Apple HEIC registered brand uses the Main or Main Still Picture profile of HEVC with an 8-bit-per-channel color depth and chroma subsampling of 4:2:0, while the Sony and Canon HIEX registered brands may additionally increase the bit-depth to 10 bits per channel and chroma subsampling to 4:2:2 or 4:4:4.

Licensing and Patents

If BMFF HEIF is used with HEVC encoding, then it is worth noting that HEV is heavily encumbered with patents, and the Library of Congress does not recommend using such heavily patented formats. The parties holding patents on HEVC include but are not limited to:

The uncertainty of patent encumbering is further strengthened by unclear patent-holders' wordings. Holders of relevant patents stated to the ISO that "the holders of these patent rights have assured the ISO and IEC that they are willing to negotiate licenses under reasonable and non-discriminatory terms." The specification also cautions that "some of the elements . . . may be the subject of patent rights other than those identified."

History

[edit]

The requirements and main use cases of HEIF were defined in 2013.[1][2] The technical development of the specification took about one-and-a-half years and was finalized in the middle of 2015.[3]

Apple was the first major adopter of the format in 2017, with the introduction of iOS 11 using the HEIC variant. While HEIC became the default for iPhones, it remains possible to revert the settings to allow photos to be recorded in the more-recognizable JPEG format.[4]

Android devices containing the appropriate hardware encoders received support for HEIC files with the release of Android 10 (2019).[5]

On some systems, pictures stored in the HEIC format are converted automatically to the older JPEG format when they are sent outside of the system, although incompatibility has led to problems such as US Advanced Placement test takers failing due to their phones uploading unsupported HEIC images by default,[6] leading the College Board to request students change the settings to send only JPEG files.[7]

Although HEIC is gaining in popularity, there are issues with compatibility. For example, Adobe Photoshop is a popular image editing software that only supports 8-bit HEIC and not 10-bit or 12-bit HEIC yet.[8]

Camera hardware (including mobile devices) are increasingly supporting outputting HEIC files and with color depth higher than 8-bit color.[9]

Specifications

[edit]

HEIF files can store the following types of data:[10]

Image items
Storage of individual images, image properties, and thumbnails.
Image derivations
Derived images enable non-destructive image editing, and are created on-the-fly by the rendering software using editing instructions stored separately in the HEIF file. These instructions (rectangular cropping, rotation by quarter-turns, timed graphic overlays, etc.) and images are stored separately in the HEIF file, and describe specific transformations to be applied to the input images. The storage overhead of derived images is small.
Image sequences
Storage of multiple time-related and/or temporally predicted images (like a burst-photo shot or cinemagraph animation), their properties, and thumbnails. Different prediction options can be used to exploit the temporal and spatial similarities between the images. Hence, file sizes can be drastically reduced when many images are stored in the same HEIF file.
Auxiliary image items
Storage of image data, such as an alpha plane or a depth map, which complements another image item. These data are not displayed as such, but used in various forms to complement another image item.
Image metadata
Storage of EXIF, XMP, and similar metadata which accompany the images stored in the HEIF file.

Encodings inside the container

[edit]

The HEIF container specification describes various encodings that can be stored inside it:

  • JFIF (JPEG)
  • AV1
  • HEVC

These may lead to confusion, since a user who creates or receives a .heif image cannot immediately determine which image encoding was used. Furthermore, presenting HEIF as better than JPEG may be misleading, since the truth of that claim depends on chosen encoding.

MIAF

[edit]

The Multi-Image Application Format (MIAF) is a restricted subset of HEIF specified as part of MPEG-A. It defines a set of additional constraints to simplify format options, specific alpha plane formats, profiles, and levels as well as metadata formats and brands and rules for how to extend the format.[11]

HEIC: HEVC in HEIF

[edit]

High Efficiency Video Coding (HEVC, ITU-T H.265)[12] is an encoding format for graphic data, first standardized in 2013. It is the primarily used and implied default codec for HEIF as specified in the normative Annex B to ISO/IEC 23008-12 HEVC Image File Format.

While not introduced formally in the standard, the acronym HEIC (High-Efficiency Image Codec) is used as a brand and in the MIME subtypes image/heic and image/heic-sequence. If the content conforms to certain HEVC profiles, then more specific brands can be used: HEIX for Main 10 of HEVC, HEIM for (Multiview) Main profile, and HEIS for (Scalable) Main (10) profile of L-HEVC.

A HEIC photo takes up about half the space of an equivalent-quality JPEG file.[13] The initial HEIF specification already defined the means of storing HEVC-encoded intra images (i-frames) and HEVC-encoded image sequences in which inter prediction is applied in a constrained manner.

HEVC image players are required to support rectangular cropping and rotation by one, two, and three quarter-turns. The primary use case for the mandatory support for rotation by 90 degrees is for images where the camera orientation is incorrectly detected or inferred. The rotation requirement makes it possible to manually adjust the orientation of a still image or an image sequence without needing to re-encode it. Cropping enables the image to be re-framed without re-encoding. The HEVC file format also includes the option to store pre-derived images.[14]

Samples in image sequence tracks must be either intra-coded images or inter-picture predicted images with reference to only intra-coded images. These constraints of inter-picture prediction reduce the decoding latency for accessing any particular image within a HEVC image sequence track.

The .heic and .heics file name extensions are conventionally used for HEVC-coded HEIF files.[15] Apple products, for instance,[16] will only produce files with these extensions, which indicate clearly that the data went through HEVC encoding.[17]

AVCI: AVC in HEIF

[edit]

Advanced Video Coding (AVC, ITU-T H.264) is an older encoding format for video and images, first standardized in 2003. It is also specified as a codec to be supported in HEIF in normative Annex 5 to ISO/IEC 23008-12. The registered MIME types are image/avci for still images and image/avcs for sequences. The format is simply known as AVCI.

Apple products support playback of AVC-encoded .avci still image files and .avcs image sequence files[16] but will only generate .heic files.

AVIF: AV1 in HEIF

[edit]
This section is about AV1 and AVIF. For AVI, see Audio Video Interleave.
Main article: AVIF

AV1 is a video encoding format that is intended to be royalty-free, developed by the Alliance for Open Media (AOMedia). AV1 Image File Format (AVIF) is an image format based on this codec.[18]

The registered MIME type is image/avif for both still images and image sequences, and .avif is the file name extension.[19]

JPEG compression formats in HEIF files

[edit]

The original JPEG standard is the most commonly used and widely supported lossy image coding format. It was first released in 1992 by ITU-T and ISO/IEC. Although Annex H to ISO/IEC 23008-12 specifies JPEG (and indirectly Motion JPEG) as a possible format for HEIF coded image data, it is used in HEIF only for thumbnails and other secondary images. Therefore, neither a dedicated MIME subtype nor a special file extension is available for storage of JPEG files in HEIF container files.

Several other compression formats defined by the JPEG group can be stored in HEIF files:

  • Part 16 of the JPEG 2000 standard suite (ISO/IEC 15444-16 and ITU-T Rec. T.815) defines how to store JPEG 2000 images in HEIF container files.[20][21] Part 2 of the JPEG 2000 suite (ISO/IEC 15444-2 and ITU-T Rec. T.801)[22][23] also defines a different format for storing JPEG 2000 images in files that is also based on ISOBMFF.
  • Annex F of the JPEG XR image coding standard (ISO/IEC 29199-2 and ITU-T Rec. T.832) defines how to store JPEG XR images in HEIF container files.[24][25] Annex A of JPEG XR also defines a different file format for storing JPEG XR images in files that is TIFF-based, and Part 2 of the JPEG 2000 suite (ISO/IEC 15444-2 and ITU-T Rec. T.801) also supports a third file format for storing JPEG XR images in files that is based on ISOBMFF.
  • JPEG XS has its HEIF container support defined in ISO/IEC 21122-3.[26]

In 2017, Apple announced that it would adopt HEIC as the default image format in its new operating systems, gradually replacing JPEG.[27]

WXAM, SharpP

[edit]

The proprietary image format WXAM (or wxHEPC) developed by Tencent (used within, e.g., WeChat) is apparently based upon HEVC,[28] as is SharpP, which was developed by their SNG (Social Network Group) division.[29][30] However, their container format may not be HEIF-compatible. In March 2017, SharpP switched to AVS2[31] and was renamed TPG (Tiny Portable Graphics).[30][32]

Support

[edit]
See also: AVIF § Support
  • Nokia provides an open source Java HEIF decoder.[14]
  • The open source library libheif supports reading and writing HEIF files.[33][34] From version 1.8.0, both reading and writing HEIC and AVIF are supported.[33]
  • An image codec called CopyTrans HEIC, which is free for personal use and available for Windows versions 7 through 10, supports opening HEIF files in Windows Photo Viewer without the Microsoft codec installed. (The Microsoft HEIC codec is only available for Windows 10, version 1803 and up in the Photos UWP app.)[35]

Operating systems

[edit]

Web browsers

[edit]

As of August 2024, only Safari supports HEIC format natively.[51]

For AVIF, Chrome, Firefox and Opera for desktop and Android support it. Safari on iOS 16 and iPadOS 16 supports AVIF format.[52]

Image editing software

[edit]

Hardware

[edit]

Websites

[edit]
  • During May 2020, online Advanced Placement exams allowed students to submit photos of handwritten responses. Because the website was unable to process HEIF images, students whose phones defaulted to this image format were considered to have not submitted any response and often failed to complete the exam. College Board, which administers the exams, later provided a system for users to submit photos of answers via email. Because the iOS Mail app automatically converts HEIF images to JPEG, this mitigated the problem.[79]
  • Facebook supports the upload of HEIC but converts to JPEG or WEBP on display.[80]
  • Discord does not support HEIC at all.[81]

Patent licensing

[edit]
Further information: High Efficiency Video Coding § Patent holders

HEIF itself is a container that may not be subject to additional royalty fees for commercial ISOBMFF licensees. However, Nokia also grants its patents on a royalty-free basis for non-commercial purposes.[82] When containing images and image sequences encoded in a particular format (e.g. HEVC or AVC) its use becomes subject to the licensing of patents on the coding format.[83][84][85]

See also

[edit]
  • Better Portable Graphics (BPG) – another image file format using HEVC encoding, published by Fabrice Bellard in 2014
  • JPEG XL – an image file format developed since 2019 (standardization completed since 2022) and based on Google PIK [Wikidata] and Cloudinary FLIF (itself based upon FUIF [Wikidata]) claiming to outperform PNG, WebP, BPG and JPEG 2000 for lossless encoding at least
  • WebP – an image file format based on the VP8 and VP9 video formats

References

[edit]
  1. ^ "Requirements for still image coding using HEVC". chiariglione.org. 2013-07-29. Archived from the original on 2021-05-17. Retrieved 2018-08-24.
  2. ^ "Requirements for HEVC image sequences". mpeg.chiariglione.org. 2013-07-29. Archived from the original on 2021-05-17. Retrieved 2018-08-24.
  3. ^ "Evidence motivates MPEG to launch new standardization effort for HDR". chiariglione.org. 2015-06-26. Archived from the original on 2021-04-15. Retrieved 2018-08-24.
  4. ^ "How to Stop iPhone from Taking Photos in HEIC-HEIF". Heic.Info. Retrieved 15 April 2024.
  5. ^ "HEIF Imaging". Android Open Source Project. Retrieved 2023-11-11.
  6. ^ Monica Chin (2020-05-02). "Students are failing AP tests because the College Board can't handle iPhone photos". The Verge. Retrieved 2022-08-25.
  7. ^ @CollegeBoard (May 12, 2020). "If you want to submit a photo of a handwritten AP Exam answer from an iPhone or iPad, make sure to change your camera settings so your photos are saved as JPEGs, not HEICs" (Tweet) – via Twitter.
  8. ^ "File formats in Adobe Photoshop".
  9. ^ "A bit confused: what's a HEIF and why do we need 10-bit stills and video?". DPReview. Retrieved 2023-11-11.
  10. ^ M. M. Hannuksela; E. B. Aksu; V. K. Malamal Vadakital; J. Lainema (October 2015). "Overview of the High Efficiency Image File Format". JCT-VC. document JCTVC-V0072. Archived from the original on 2021-11-24. Retrieved 2015-11-25.
  11. ^ ISO/IEC 23000-22. Multimedia application format (MPEG-A) — Part 22: Multi-image application format (MIAF), ISO/IEC MPEG, archived from the original on 2020-04-26, retrieved 2020-04-29
  12. ^ Fleishman, Glenn (26 June 2020). "What the HEIC? Apple's Highly Compressed Image Format Still Confuses". TidBITS. Archived from the original on 28 June 2020. Retrieved 28 June 2020.
  13. ^ Lainema, Jani; Ugur, Kemal (2012-04-20). "On HEVC still picture coding performance". JCT-VC. Retrieved 2013-01-22.
  14. ^ a b High Efficiency Image File Format. "HEIF Technical Information". nokiatech.github.io. Nokia. Images in HEIF Files. Archived from the original on 2018-02-01. Retrieved 2018-02-01. Cite error: The named reference "Nokia" was defined multiple times with different content (see the help page).
  15. ^ "Working with HEIF and HEVC - WWDC 2017 - Videos". Apple Developer. Archived from the original on 2019-01-20. Retrieved 2019-01-19.
  16. ^ a b c "High Efficiency Image File Format". Apple. June 2017. Event occurs at 0:09:26. Archived from the original on 2017-12-01. Retrieved 2017-11-22. Cite error: The named reference "WWDC2017 513" was defined multiple times with different content (see the help page).
  17. ^ Shankland, Stephen (June 16, 2017). "How Apple is squeezing more photos into your iPhone – FAQ: Apple's newest iPhone software attempts to move the world out of the JPEG era". CNET. Archived from the original on 2017-11-16. Retrieved 2017-11-21.
  18. ^ "Apple wants to shrink your photos, but a new format from Google and Mozilla could go even farther". CNET. 2018-01-19. Archived from the original on 2018-02-01. Retrieved 2018-02-01.
  19. ^ "AV1 Image File Format (AVIF)". AOMediaCodec.GitHub.io. Archived from the original on 24 February 2023. Retrieved 25 February 2023.
  20. ^ "ISO/IEC 15444-16:2021 - Information technology — JPEG 2000 image coding system — Part 16: Encapsulation of JPEG 2000 images into ISO/IEC 23008-12". ISO. 2020-01-22. Archived from the original on 2021-11-17. Retrieved 2021-11-24.
  21. ^ tsbmail (2021-11-11). "T.815 : Information technology - JPEG 2000 image coding system - Encapsulation of JPEG 2000 images into ISO/IEC 23008-12". Itu.int. Archived from the original on 2021-11-17. Retrieved 2021-11-24.
  22. ^ "ISO/IEC 15444-2:2021 - Information technology — JPEG 2000 image coding system — Part 2: Extensions". ISO. 2020-07-29. Archived from the original on 2021-11-17. Retrieved 2021-11-24.
  23. ^ tsbmail (2021-10-29). "T.801 : Information technology-JPEG 2000 image coding system - Extensions". Itu.int. Archived from the original on 2021-11-17. Retrieved 2021-11-24.
  24. ^ "ISO/IEC 29199-2:2020 - Information technology — JPEG XR image coding system — Part 2: Image coding specification". ISO. 2019-08-29. Archived from the original on 2021-11-17. Retrieved 2021-11-24.
  25. ^ tsbmail. "T.832 : Information technology - JPEG XR image coding system - Image coding specification". Itu.int. Archived from the original on 2021-11-16. Retrieved 2021-11-24.
  26. ^ "ISO/IEC 21122-3:2019 - Information technology — JPEG XS low-latency lightweight image coding system — Part 3: Transport and container formats". ISO. 2017-08-25. Archived from the original on 2021-11-17. Retrieved 2021-11-24.
  27. ^ Rus, Cristian (2017-06-26). "Así es HEIF, el nuevo formato de imagen con el que Apple quiere acabar con JPEG". Applesfera (in Spanish). Archived from the original on 2020-03-21. Retrieved 2020-03-22.
  28. ^ Tencent Technology (2018-01-30). "如何节省1Tb图片带宽？解密极致图像压缩！_腾讯技术工程的技术博客_51Cto博客" [How do we save 1TB on image bandwidth? Declassifying our extreme image compression!]. 51CTO.
  29. ^ "图片流量节省大杀器：基于 CDN 的 sharpP 自适应图片技术实践 - 腾讯云开发者社区-腾讯云" [Image bandwidth-saving weapon: Practical CDN-deployed self-adapting sharpP images]. 2017-06-30."秒开率达90%：腾讯看点客户端 Gif 转视频优化方案 - 腾讯云开发者社区-腾讯云" [Instant load in 90% of cases: Tencent Kandian GIF-to-video solution]. 2019-12-17.
  30. ^ a b "腾讯社交网络图片带宽优化技术演进之路 - 腾讯云开发者社区-腾讯云" [Timeline for Tencent's optimization of social network image delivery]. 2017-12-27. SharpP工具从17年3月开始，已采用AVS2作为新的内核；17年5月正式对外推出基于AVS2的图片格式，联合北大、AVS组织一起完善相关规范，并命名为TPG（Tiny Portable Graphics） [Since March 2017, SharpP uses AVS2 as its new core. In May 2017, [we] made the new AVS2-based format public, completing the standard with Peking University and AVS the organization, and named it TPG (Tiny Portable Graphics)]
  31. ^ "基于Avs2的图片容器——TPG：现状与改进之路 - 腾讯云开发者社区-腾讯云" [Avs2-based image container: TPG: current situation and roadmap for improvement (Interview with Tencent's Audio-Video Lab)]. 2018-02-01.
  32. ^ "超越 Google，腾讯推出自研图片编码格式 TPG - 腾讯云开发者社区-腾讯云" [Ahead of Google: Tencent introduces independent image codec TPG]. 2017-05-10.
  33. ^ a b "strukturag/libheif". May 17, 2021. Archived from the original on June 2, 2018. Retrieved May 2, 2018 – via GitHub.
  34. ^ "strukturag/libheif". GitHub. Archived from the original on 2020-06-18. Retrieved 2020-06-17.
  35. ^ "Open HEIC files on Windows". CopyTrans.net. Archived from the original on 2018-09-16. Retrieved 2018-09-27.
  36. ^ "Announcing Windows 10 Insider Preview Build 17123 for Fast Ring Subscribers". Archived from the original on 2020-08-06. Retrieved 2018-03-16.
  37. ^ "HEIC format support changes in 2023-11 Cumulative Update for Windows 11 Version 22H2 for x64-based Systems (KB5032190)". 2023-11-19.
  38. ^ Hollister, Sean (2017-06-05). "Apple answers iPhone storage woes with smaller photos, videos". CNET. CBS Interactive. Archived from the original on 2021-01-22. Retrieved 2017-09-30.
  39. ^ Czachurski, Marcin (2018-06-29). "macOS Mojave dynamic wallpaper". ITNEXT. Archived from the original on 2019-03-03. Retrieved 2018-09-18.
  40. ^ Snell, Jason (2017-09-20). "iOS 11: HEVC, HEIF, and what you need to know about these new video and photo formats". Macworld. Archived from the original on 2018-11-16. Retrieved 2017-09-30.
  41. ^ Shu, Les (September 19, 2017). "Here's what HEIF and HEVC are, and why they'll improve your iPhone with iOS 11". Digital Trends. Archived from the original on 2021-01-22. Retrieved 2017-09-30.
  42. ^ "WebKit Features in Safari 16.0". 12 September 2022.
  43. ^ "Introducing HEIF and HEVC". Apple. 2017-06-06. Event occurs at 0:13:47. Archived from the original on 2017-12-01. Retrieved 2017-11-22.
  44. ^ "Supported media formats". Archived from the original on 2016-12-20. Retrieved 2021-08-19.
  45. ^ "HEIF Imaging". Android Open Source Project. Retrieved 2022-08-05.
  46. ^ "Previewing Android P". Android Developers Blog. Archived from the original on 2021-05-18. Retrieved 2018-03-07.
  47. ^ "Introducing Android Q Beta". Archived from the original on 2019-05-07. Retrieved 2020-05-22.
  48. ^ a b "10-Bit Camera Output". Android Open Source Project. Retrieved 2023-11-11.
  49. ^ "software recommendation - Any app on Ubuntu to open and/or convert HEIF pictures (.HEIC, High Efficiency Image File Format)?". Ask Ubuntu. Archived from the original on 2020-11-11. Retrieved 2020-10-09.
  50. ^ "Libheif - Debian Package Tracker".
  51. ^ "Can I use... Support tables for HTML5, CSS3, etc". caniuse.com. Retrieved 2024-08-27.
  52. ^ "AVIF image format | Can I use... Support tables for HTML5, CSS3, etc". caniuse.com. Archived from the original on 2022-01-26. Retrieved 2022-02-07.
  53. ^ "HEIC and HEVC media files support in Lightroom and Camera Raw". helpx.adobe.com. Archived from the original on 2021-01-22. Retrieved 2019-07-29.
  54. ^ "File formats in Adobe Photoshop". helpx.adobe.com. Archived from the original on 2020-12-08. Retrieved 2020-12-14.
  55. ^ Pagès, Jehan (2018-05-20). "GIMP 2.10.2 Released". gimp.org. Archived from the original on 2020-11-09. Retrieved 2019-11-22.
  56. ^ "GIMP 2.10.2 Released". GIMP News. 2018-05-20. Archived from the original on 2020-11-09. Retrieved 2018-05-22.
  57. ^ "Krita 4.1 Release Notes". Archived from the original on 2018-11-19. Retrieved 2018-11-19.
  58. ^ "paint.net 4.2 is now available!". 2019-07-13. Archived from the original on 2019-07-14. Retrieved 2019-07-13.
  59. ^ Friday, William Gallagher (2018-11-16). "How to work with, edit, and share HEIC images without data loss". Apple Insider. Archived from the original on 2019-01-20. Retrieved 2019-01-19.
  60. ^ "Zoner Photo Studio X brings support for the HEIF image format to Windows". DPReview. Archived from the original on 2021-01-23. Retrieved 2018-03-20.
  61. ^ "HEIF support comes to Windows with Zoner Photo Studio". DIY Photography. 2017-11-28. Archived from the original on 2021-01-21. Retrieved 2018-03-20.
  62. ^ Pierre, GOUGELET. "Supported graphic and image formats | XnView.com". XnView Software. Retrieved 2023-10-12.
  63. ^ https://media.the-digital-picture.com/Information/Canon-EOS-1D-X-Mark-III-Still-Image-White-Paper.pdf Archived 2021-01-21 at the Wayback Machine page 45
  64. ^ "Inside Canon HEIF". github.com. 2020-03-16. Archived from the original on 2020-11-01. Retrieved 2020-03-16.
  65. ^ Artaius, James (October 29, 2019). "Canon graduates from JPG: 'We've moved on to HEIF files…'". Digital Camera World. Archived from the original on September 25, 2020. Retrieved September 20, 2020.
  66. ^ "Sony Alpha 1 Full-frame Interchangeable Lens Mirrorless Camera | ILCE1/B | Sony US". Electronics.Sony.com. Archived from the original on 2021-05-18. Retrieved 2021-05-18.
  67. ^ "ILCE-7M4 Specifications". electronics.sony.com. Archived from the original on 2021-12-07. Retrieved 2021-12-07.
  68. ^ "Fujifilm X-H2S Specifications". Retrieved 2023-02-18.
  69. ^ "Fujifilm X-H2 Specifications". Retrieved 2023-02-18.
  70. ^ "Fujifilm X-T5 Specifications". Retrieved 2023-02-18.
  71. ^ "Fujifilm X100VI Specifications". Retrieved 2024-05-06.
  72. ^ "Archived copy" (PDF). Archived (PDF) from the original on 2020-04-10. Retrieved 2020-05-22.{{cite web}}: CS1 maint: archived copy as title (link)
  73. ^ "Snapdragon 662 Mobile Platform". Qualcomm. January 14, 2020. Archived from the original on February 22, 2020. Retrieved May 22, 2020.
  74. ^ "Qualcomm Snapdragon 888 5G Mobile Platform | Latest 5G Snapdragon Processor". Qualcomm. 2020-11-17. Archived from the original on 2021-06-01. Retrieved 2021-06-06.
  75. ^ "Snapdragon 780G 5G Mobile Platform". Qualcomm. 2021-03-25. Archived from the original on 2021-06-07. Retrieved 2021-06-06.
  76. ^ "Using HEIF or HEVC Media on Apple Devices". Support.Apple.com. Archived from the original on 2021-06-14. Retrieved 2021-07-08.
  77. ^ "X2D-100c Firmware Update 3.1.0". Hasselblad. 2022-07-05. Retrieved 2023-03-01.
  78. ^ "907X & CFV-100C Digital Back FAQ". Hasselblad. Retrieved 2023-03-01.
  79. ^ Chin, Monica (20 May 2020). "Students are failing AP tests because the College Board can't handle iPhone photos". The Verge. Archived from the original on 22 May 2020. Retrieved 22 May 2020.
  80. ^ Gallagher, William (2018-11-16). "How to work with, edit, and share HEIC images without data loss". Apple Insider. Archived from the original on 2020-08-13. Retrieved 2020-08-14.
  81. ^ Technik (2019-10-27). "Feature Request: Support for HEIF images - Discord Support Community". Discord Support Community.
  82. ^ "Nokia High-Efficiency Image File Format (HEIF) License". GitHub. Archived from the original on 2020-11-12. Retrieved 2020-05-07.
  83. ^ "macOS High Sierra tech preview: A quick look at the stuff you can't see". 2017-06-19. Archived from the original on 2017-06-20. Retrieved 2017-07-04. If there's one major downside to both HEVC and HEIF, it's that they're covered by patents that may need to be licensed for use in various apps and services.
  84. ^ "Converting a JPEG to the new HEIF format". Archived from the original on 2017-07-07. Retrieved 2017-07-04. HEIF and HEVC are extensively covered by patents, which means there could be legal implications to implementing HEIF support, particularly in paid software or a hardware product.
  85. ^ Ozer, Jan; Gill, Dror (2017-06-12). "Apple Endorses New Image Format, HEIF". Archived from the original on 2019-03-21. Retrieved 2017-10-31.
[edit]
Retrieved from "https://en.wikipedia.org/w/index.php?title=High_Efficiency_Image_File_Format&oldid=1262787301"