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image: jpg / webp / avif / jxl #170
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评测https://tsev.dev/posts/2023-11-10-should-avif-be-the-dominant-image-format/ 结论
personal suggestion for quality settings:
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jpegjpeg 文件格式
// JPG contains SOI, APP1, [APP2, ... APPn], DQT, DHT, and more segments
// APPn contain metadata about the image in various formats. There can be multiple APPn segments,
// even multiple segments of the same type.
// APP1 contains the basic and most important EXIF data.
// APP2 contains ICC
// APP13 contains IPTC exif (APP1段, id 为 Exif)实例
tiff// Structure of TIFF (APP1-EXIF):
// - FF E1 - marker
// - xx xx - Size
// - 45 78 69 66 00 00 / ASCII string 'Exif\0\0'
// - TIFF HEADER
// - 0th IFD + value
// - 1th IFD + value
// - may contain additional GPS, Interop, SubExif blocks (pointed to from IFD0)
实际来看, jpeg APP1-exif 段包含一个完整 tiff 文件. TIFF HEADERexport const TIFF_LITTLE_ENDIAN = 0x4949
export const TIFF_BIG_ENDIAN = 0x4D4D |
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