2021년 2월 17일 (수) 08:13에 Pythagoras0님의 편집

2021-02-17T08:13:38Z

Pythagoras0: /* 메타데이터 */ 새 문단

2020-12-26T12:20:33Z

메타데이터: 새 문단

Pythagoras0: /* 노트 */ 새 문단

2020-12-21T09:55:28Z

노트: 새 문단

새 문서

== 노트 ==

===위키데이터===
* ID : [https://www.wikidata.org/wiki/Q1676669 Q1676669]
===말뭉치===
# The JPG image file type, typically pronounced jay-peg, was developed by the Joint Photographic Experts Group (JPEG) in 1992.<ref name="ref_c32764fe">[https://www.techsmith.com/blog/jpg-vs-png/ JPG vs. PNG: Which Should I Use?]</ref>
# It offers much better compression than PNG or JPEG with support for higher color depths, animated frames, transparency etc.<ref name="ref_b592f3ad">[https://developer.mozilla.org/en-US/docs/Web/Media/Formats/Image_types Image file type and format guide - Web media technologies]</ref>
# PNG is preferred over JPEG for more precise reproduction of source images, or when transparency is needed.<ref name="ref_b592f3ad" />
# WebP offers much better compression than PNG or JPEG with support for higher color depths, animated frames, transparency etc.<ref name="ref_b592f3ad" />
# The older formats like PNG, JPEG, GIF have poor performance compared to newer formats like WebP and AVIF, but enjoy broader "historical" browser support.<ref name="ref_b592f3ad" />
# JPEG, which stands for Joint Photographic Experts Groups is a “lossy” format meaning that the image is compressed to make a smaller file.<ref name="ref_30e8243e">[https://guides.lib.umich.edu/c.php?g=282942&p=1885348 Research Guides at University of Michigan Library]</ref>
# JPEG (pronounced "jay-peg") is a standardized image compression mechanism.<ref name="ref_da3715cf">[https://kb.iu.edu/d/adqe What is the JPEG graphics file format?]</ref>
# JPEG stands for Joint Photographic Experts Group, the original name of the committee that wrote the standard.<ref name="ref_da3715cf" />
# JPEG compresses either full-color or grayscale images, and works best with photographs and artwork.<ref name="ref_da3715cf" />
# JPEG uses a lossy compression method, meaning that the decompressed image isn't quite the same as the original.<ref name="ref_da3715cf" />
# The topic of RAW vs JPEG image format is one of the never-ending debates in photography.<ref name="ref_7778bbc2">[https://photographylife.com/raw-vs-jpeg RAW vs JPEG – Which Image Format is Better and Why]</ref>
# Some photographers say shoot in RAW, while others say shoot in JPEG.<ref name="ref_7778bbc2" />
# What is the RAW format in digital photography and what are its advantages and disadvantages when compared to JPEG?<ref name="ref_7778bbc2" />
# JPEG is a no-brainer – it’s the default image format that is used in most smartphones and point-and-shoot cameras, so we know what to expect from it.<ref name="ref_7778bbc2" />
# A JPEG file is an image saved in a compressed graphic format standardized by the Joint Photographic Experts Group ( JPEG ).<ref name="ref_456c8e54">[https://fileinfo.com/extension/jpeg .JPEG File Extension]</ref>
# In 1992, the workgroup created the JPEG file format.<ref name="ref_456c8e54" />
# JPEG files are images created using a lossy compression algorithm, which actually destroys some data contained within the original image file.<ref name="ref_456c8e54" />
# A JPEG file also contains metadata that describes the contents of its file, such as the color space, color profile, and image dimension information.<ref name="ref_456c8e54" />
# While converting some images to JPEG will result in a less crisp picture, the format is known for its ability to retain the best possible quality in the smallest possible file size.<ref name="ref_d01a81e0">[https://www.wikihow.com/Convert-Pictures-To-JPEG How to Convert Pictures To JPEG]</ref>
# While you don't have to be a computer whiz to convert an image to JPEG, you will need to learn a few tricks of the trade.<ref name="ref_d01a81e0" />
# As a photographer you shoot in Raw or Jpeg, or sometimes both.<ref name="ref_339f7821">[https://digital-photography-school.com/what-is-the-best-file-format-to-save-your-photos-in-psd-tiff-jpeg-gif%C2%A0-png/ What is the Best File Format to Save Your Photos In? PSD * TIFF * JPEG * GIF * PNG]</ref>
# While there is a compression and loss of information editing jpeg images, the difference is so minor unless you are re-opening dozens of times.<ref name="ref_339f7821" />
# JPEG files (compressed images) start with an image marker which always contains the marker code hex values FF D8 FF.<ref name="ref_e1e36ee6">[https://www.file-recovery.com/jpg-signature-format.htm JPG Signature Format: Documentation & Recovery Example]</ref>
# It does not have a length of the file embedded, thus we need to find JPEG trailer, which is FF D9.<ref name="ref_e1e36ee6" />
# Length is the size of the JFIF (APP0) marker segment, including the size of the Length field itself and any thumbnail data contained in the APP0 segment.<ref name="ref_e1e36ee6" />
# Version identifies the version of the JFIF specification, with the first byte containing the major revision number and the second byte containing the minor revision number.<ref name="ref_e1e36ee6" />
# JPEG is a lossy raster format that stands for Joint Photographic Experts Group, the technical team that developed it.<ref name="ref_d51a0f12">[https://99designs.com/blog/tips/image-file-types/ Image file formats: when to use each file type]</ref>
# Do note that TIFF files can also be used as a “container” for JPEG images.<ref name="ref_d51a0f12" />
# Typically, images are processed (adjusted for color, white balance, exposure, etc.) and then converted and compressed into another format (e.g. JPEG or TIFF).<ref name="ref_d51a0f12" />
# JPEG stands for Joint Photographic Experts Group.<ref name="ref_f58e8d9b">[https://www.coolutils.com/Formats/JPEG What is JPEG? JPEG Image File Format Description]</ref>
# We also call JPEG the file format which employs this compression.<ref name="ref_f58e8d9b" />
# The JPEG committee has now created its own wavelet-based standard, JPEG 2000, which is intended to eventually supersede the original JPEG standard.<ref name="ref_f58e8d9b" />
# When you need to convert JPEG files to other formats like TIFF, PNG, BMP use Total Image Converter.<ref name="ref_f58e8d9b" />
# JPEG stands for Joint Photographic Experts Group, which is the name of the organisation that developed the image format.<ref name="ref_523e7305">[https://www.scmp.com/yp/discover/entertainment/tech-gaming/article/3073568/jpeg-png-or-gif-what-these-image-formats-mean JPEG, PNG or GIF? What these image formats mean and when to use them]</ref>
# Saving these kinds of graphics in JPEG often results in pixellation around the edges – when an image becomes blurry and you can see individual pixels.<ref name="ref_523e7305" />
# These types of graphics won’t be as pixellated in PNG form as they would be as a JPEG.<ref name="ref_523e7305" />
# As a result, images saved as GIFs are limited to just 256 colours, compared to around16 million possible colours in a JPEG image.<ref name="ref_523e7305" />
# JPEG is a lossy format, Converting an image from other formats( e.g. PNG, BMP ) to JPEG format will cause quality loss.<ref name="ref_b55000b6">[https://compressimage.toolur.com/ Compress and Resize JPEG Images & Photos Online]</ref>
# int DEPTH_JPEG Depth augmented compressed JPEG format.<ref name="ref_eefdd7b1">[https://developer.android.com/reference/android/graphics/ImageFormat Android Developers]</ref>
# int JPEG Compressed JPEG format.<ref name="ref_eefdd7b1" />
# DEPTH_JPEG Added in API level 29 public static final int DEPTH_JPEG Depth augmented compressed JPEG format.<ref name="ref_eefdd7b1" />
# JPEG compressed main image along with XMP embedded depth metadata following ISO 16684-1:2011(E).<ref name="ref_eefdd7b1" />
# The procedure for compressing the digital images in JPEG format is carried out in several stages.<ref name="ref_7fe5f49e">[https://onlineconvertfree.com/convert-format/jpg-to-jpeg/ Convert JPG to JPEG online, free .jpg to .jpeg converter]</ref>
# JPEG uses a "lossy" compression system and discrete cosine transform technology.<ref name="ref_7fe5f49e" />
# Use the PDF to JPEG converter to transform entire PDF pages into high-quality JPG images.<ref name="ref_c041ed0b">[https://smallpdf.com/pdf-to-jpg Convert your PDFs to Images online for free]</ref>
# Some JPEG Image files use the .JPE file extension but that's not very common.<ref name="ref_2e0825dd">[https://www.lifewire.com/jpg-jpeg-file-4139913 What Is a JPG File? (And How to Open One)]</ref>
# Some websites and programs might not recognize an image as a JPEG Image file unless it has the proper file extension that the program is looking for.<ref name="ref_2e0825dd" />
# Both JPG and JPEG represent an image format supported by the Joint Photographic Experts Group and have the exact same meaning.<ref name="ref_2e0825dd" />
# Like HTM and HTML files, when the JPEG format was first introduced, the official file extension was JPEG (with four letters).<ref name="ref_2e0825dd" />
# We have already mentioned the format briefly in this article “ Graphic file formats – JPEG, PNG, SVG, PDF” .<ref name="ref_4ae9d334">[https://www.logaster.com/blog/jpeg/0/ Advantages and disadvantages of JPEG format [Infographic]]</ref>
# However, JPEG is ideal for home photo storage, photo transmission through the Internet or posting on the site.<ref name="ref_4ae9d334" />
# JPEG (Joint Photographic Experts Group) is an image compression format used for image files.<ref name="ref_4e64caa8">[https://medium.com/hd-pro/jpeg-formats-progressive-vs-baseline-73b3938c2339 JPEG Formats — Progressive vs. Baseline]</ref>
# Since JPEG is compressed, it is a good image format to use for websites, allowing faster downloads.<ref name="ref_4e64caa8" />
# JPEG requires an encoder that compresses the image format, whether it is from camera RAW or directly from an image processor.<ref name="ref_4e64caa8" />
# Cameras can store a captured image directly to JPEG, depending on the settings.<ref name="ref_4e64caa8" />
# JPEG (Joint Photographic Experts Group) refers to a standards organization, a method of file compression, and sometimes a file format.<ref name="ref_bfc6cb16">[https://www.fileformat.info/format/jpeg/egff.htm JPEG File Interchange Format: Summary from the Encyclopedia of Graphics File Formats]</ref>
# The JPEG File Interchange Format (JFIF) is a development of C-Cube Microsystems for the purpose of storing JPEG-encoded data.<ref name="ref_bfc6cb16" />
# Both JPEG and JFIF data are byte streams, always storing 16-bit word values in big-endian format.<ref name="ref_bfc6cb16" />
# XThumbnail and YThumbnail give the dimensions of the thumbnail image included in the JFIF APP0 marker.<ref name="ref_bfc6cb16" />
# Most of the "Save" options will be greyed-out as the JPEG format can not hold extra features, such as Layers.<ref name="ref_07240b7f">[http://shutha.org/node/829 'JPEG' File Format]</ref>
# But in Photoshop, setting the JPEG quality level to "Maximum" can mean values of '10', '11' or '12'.<ref name="ref_07240b7f" />
# If you are working with older graphic programmes then note that some use a JPEG scale representing Compression rather than Quality.<ref name="ref_07240b7f" />
# The increase in JPEG compression does not come for free, though, as to achieve smaller sizes the JPEG file format removes increasing amounts of colour information from the pixels.<ref name="ref_07240b7f" />
# However, the JPEG lossy compression method can help to keep your visual files small, so that they load faster online.<ref name="ref_a68480c8">[https://meridianthemes.net/jpg-vs-jpeg-file-formats/ JPG vs JPEG File Formats: Is There a Difference?]</ref>
# The term “JPEG” can also refer to the Joint Photographic Experts Group, which is the name of the sub-committee responsible for building the JPEG image standard.<ref name="ref_a68480c8" />
# The JPEG format was issued by the International Organization for Standardization in 1992.<ref name="ref_a68480c8" />
# The JPEG format is the most common option used by digital cameras, and it supports 16,777,216 colors in total.<ref name="ref_a68480c8" />
# If you’ve ever moved photographs from a digital camera to a computer before, you’ll have encountered the JPEG (pronounced jay-peg) file format.<ref name="ref_1674fdcc">[https://digitalcommunications.wp.st-andrews.ac.uk/2019/04/08/what-is-a-jpeg-file/ What is a JPEG file?]</ref>
# Digital cameras compress raw photographs as JPEG images to make the files smaller in size.<ref name="ref_1674fdcc" />
# The JPEG file format was submitted and approved in 1992.<ref name="ref_1674fdcc" />
# The higher frequency, more checkerboard-like, patterns have their respective weights lowered by an amount that depends on the JPEG quality setting.<ref name="ref_1674fdcc" />
# JPEG is an abbreviated form of Joint Photographic Experts Group, the independent committee that created it as a standard for photography compression, which was approved in 1994 as ISO 10918-1.<ref name="ref_60111ccd">[https://www.ntchosting.com/encyclopedia/multimedia/jpg-image-file-format/ The JPEG (Joint Photographic Experts Group) image file format]</ref>
# The JPEG image file format has become popular for offering an amazingly effective compression method for color images.<ref name="ref_60111ccd" />
# It helps images to be compressed to about five percent of their original size, which allows for minimized traffic consumption for websites using JPEG images.<ref name="ref_60111ccd" />
# Generally, you can control the compression quality results by choosing from a range of compression algorithms when creating a JPEG file or converting an image from another format to JPEG.<ref name="ref_60111ccd" />
# The 16 million possible colors in a JPEG image are produced by using 8 bits for each color (red, green, and blue) in the RGB color space.<ref name="ref_a19b8bc7">[https://techterms.com/definition/jpeg JPEG (Joint Photographic Experts Group) Definition]</ref>
# The JPEG compression algorithm may reduce the file size of a bitmap (BMP) image by ten times with almost no degradation in quality.<ref name="ref_a19b8bc7" />
# Besides image data, JPEG files may also include metadata that describes the contents of the file.<ref name="ref_a19b8bc7" />
# JPEG images also don't support transparency.<ref name="ref_a19b8bc7" />
# 2) JPEG (usually pronounced JAY-pehg) is also a term for any graphic image file produced by using a JPEG standard.<ref name="ref_4084958e">[https://whatis.techtarget.com/definition/JPEG-Joint-Photographic-Experts-Group What is JPEG (Joint Photographic Experts Group)?]</ref>
# A JPEG file is created by choosing from a range of compression qualities (actually, from one of a suite of compression algorithms).<ref name="ref_4084958e" />
# When you create a JPEG or convert an image from another format to a JPEG, you are asked to specify the quality of image you want.<ref name="ref_4084958e" />
# Formally, the JPEG file format is specified in ISO standard 10918.<ref name="ref_4084958e" />
# But what does JPEG stand for?<ref name="ref_eed25fc1">[https://home.bt.com/tech-gadgets/photography/what-is-a-jpeg-11364206889349 The JPEG image format explained]</ref>
# A JPEG is a type of image commonly found on the internet.<ref name="ref_eed25fc1" />
# Most image programmes open JPEG files.<ref name="ref_eed25fc1" />
# That’s because graphics like these typically have sharp contrast between the pixels, which can cause some graininess in the image if it’s saved as a JPEG.<ref name="ref_eed25fc1" />
# It defines supplementary specifications for the container format that contains the image data encoded with the JPEG algorithm.<ref name="ref_06c05855">[https://en.wikipedia.org/wiki/JPEG_File_Interchange_Format JPEG File Interchange Format]</ref>
# The base specifications for a JPEG container format is defined in the Annex B of the JPEG standard, known as JPEG Interchange Format (JIF).<ref name="ref_06c05855" />
# JFIF builds over JIF to solve some of JIF's limitations, including unnecessary complexity, component sample registration, resolution, aspect ratio, and color space.<ref name="ref_06c05855" />
# JPEG allows multiple components (such as Y, Cb, and Cr) to have different resolutions, but it does not define how those differing sample arrays should be aligned.<ref name="ref_06c05855" />
# JPG (or JPEG), is a popular file format used for images and graphics—especially on the internet.<ref name="ref_b8d8f99a">[https://www.howtogeek.com/362730/how-to-convert-an-image-to-jpg-format/ How to Convert an Image to JPG Format]</ref>
# It was created by the Joint Photographic Experts Group (JPEG) and uses a compression algorithm that reduces sections of an image into blocks of pixels.<ref name="ref_b8d8f99a" />
# In the window that pops up, select JPEG as the format and use the “Quality” slider to change the compression used to save the image.<ref name="ref_b8d8f99a" />
# JPEG stands for “Joint Photographic Experts Group”.<ref name="ref_4f3a1332">[https://www.paintshoppro.com/en/pages/jpeg-file/ JPEG File: What is a .JPEG and How do I Open it?]</ref>
# Despite the huge reduction in file size JPEG images maintain reasonable image quality.<ref name="ref_4f3a1332" />
# This unique compression feature allows JPEG files to be used widely on the Internet, Computers, and Mobile Devices.<ref name="ref_4f3a1332" />
# Also, a large number of JPEG image files can be stored in minimum storage space.<ref name="ref_4f3a1332" />
# , you should familiarize yourself with common file formats such as JPEG.<ref name="ref_31f58b7a">[https://kinsta.com/blog/jpg-vs-jpeg/ JPG vs JPEG: Understanding the Most Common Image File Format]</ref>
# The first JPEG standard was issued in 1992 by ISO (International Organization for Standardization).<ref name="ref_31f58b7a" />
# The last way the term JPEG is used is when referencing a file format name or a way to store and save digital images.<ref name="ref_31f58b7a" />
# Remember when we discussed the term JPEG and how it stood for the Joint Photographic Experts Group?<ref name="ref_31f58b7a" />
# The JPEG standard (ISO/IEC 10918) was created in 1992 (latest version, 1994) as the result of a process that started in 1986.<ref name="ref_e481b640">[https://jpeg.org/jpeg/ JPEG]</ref>
# Part 1 of JPEG (ISO/IEC 10918-1 | ITU-T Recommendation T.81) specifies the core coding technology and it incorporates many options for encoding photographic images.<ref name="ref_e481b640" />
# Part 4 focuses on the registration of JPEG profiles, SPIFF profiles, SPIFF tags, SPIFF color spaces, SPIFF compression types, and defines the Registration Authorities.<ref name="ref_e481b640" />
# And lastly, Part 5 specifies the JPEG File Interchange Format (JFIF).<ref name="ref_e481b640" />
# The term "JPEG" is an initialism/acronym for the Joint Photographic Experts Group, which created the standard in 1992.<ref name="ref_d4dcc267">[https://en.wikipedia.org/wiki/JPEG Wikipedia]</ref>
# JPEG compression is used in a number of image file formats.<ref name="ref_d4dcc267" />
# The JPEG specification cites patents from several companies.<ref name="ref_d4dcc267" />
# The JPEG specification also cites three other patents from IBM.<ref name="ref_d4dcc267" />
===소스===
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← 이전 판		2020년 12월 26일 (토) 12:20 판
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JPEG File Interchange Format, version 1.02 - 편집 역사

2021년 2월 17일 (수) 08:13에 Pythagoras0님의 편집

Pythagoras0: /* 메타데이터 */ 새 문단

Pythagoras0: /* 노트 */ 새 문단