diff --git a/files/zh-cn/web/media/formats/image_types/index.md b/files/zh-cn/web/media/formats/image_types/index.md index 68d957e7fa7600..559d30eed06660 100644 --- a/files/zh-cn/web/media/formats/image_types/index.md +++ b/files/zh-cn/web/media/formats/image_types/index.md @@ -225,14 +225,14 @@ APNG 适用于无需与其他活动或音轨同步的基本动画，如进度指 带有透明度的灰度值 - 8 and 16 + 8 和 16 每个像素由两个 D 位值表示：灰度像素的强度和表示像素不透明程度的 alpha 样本。 带有透明度的真彩色 - 8 and 16 + 8 和 16 每个像素由四个 D 像素颜色成分组成：红色、绿色、蓝色和表示像素不透明程度的 alpha 样本。 @@ -428,7 +428,7 @@ BMP 理论上支持多种内部数据表示。最简单也是最常用的 BMP 带有透明度的真彩色 - 8 and 16 + 8 和 16 每个像素由四个值表示，分别代表红、绿、蓝和 alpha 颜色成分；每个值为 D 位。 @@ -454,26 +454,19 @@ BMP 理论上支持多种内部数据表示。最简单也是最常用的 BMP ### GIF（图像互换格式） -In 1987, the CompuServe online service provider introduced the **[GIF](https://en.wikipedia.org/wiki/GIF)** (**Graphics Interchange Format**) image file format to provide a compressed graphics format that all members of their service would be able to use. -GIF uses the [Lempel-Ziv-Welch](https://en.wikipedia.org/wiki/Lempel-Ziv-Welch) (LZW) algorithm to losslessly compress 8-bit indexed color graphics. -GIF was one of the first two graphics formats supported by {{Glossary("HTML")}}, along with [XBM](#xbm_x_window_system_bitmap_file). +1987 年，CompuServe 在线服务提供商推出了 **[GIF](https://zh.wikipedia.org/wiki/GIF)**（**图像互换格式**）图像文件格式，为其服务的所有成员提供一种可使用的压缩图形格式。GIF 使用 [Lempel-Ziv-Welch](https://zh.wikipedia.org/wiki/LZW)（LZW）算法对 8 位索引彩色图形进行无损压缩。GIF 和 [XBM](#xbm_X_Window_系统位图文件) 是 {{Glossary("HTML")}} 最早支持的两种图形格式之一。 -Each pixel in a GIF is represented by a single 8-bit value serving as an index into a palette of 24-bit colors (8 bits each of red, green, and blue). The length of a color table is always a power of 2 (that is, each palette has 2, 4, 8, 16, 32, 64, or 256 entries). -To simulate more than 255 or 256 colors, [dithering](https://en.wikipedia.org/wiki/Dithering) is generally used. -It is [technically possible](https://gif.ski/) to tile multiple image blocks, each with its own color palette, to create truecolor images, but in practice this is rarely done. +GIF 中的每个像素都由一个 8 位值表示，作为 24 位颜色（红、绿、蓝各 8 位）调色板的索引。颜色表的长度总是 2 的幂次（即每个调色板有 2、4、8、16、32、64 或 256 个条目）。要模拟 255 或 256 色以上的颜色，一般使用[抖动](https://zh.wikipedia.org/wiki/抖動_(數位訊號處理))。[技术上可以](https://gif.ski/)对多个图像块进行平铺，每个图像块都有自己的调色板，以创建真彩色图像，但在实践中很少这样做。 -Pixels are opaque, unless a specific color index is designated as transparent, in which case pixels colored that value are entirely transparent. +像素是不透明的，除非特定的颜色指数被指定为透明，在这种情况下，染上该值的像素是完全透明的。 -GIF supports simple animation, in which following an initial full-size frame, a series of images reflecting the parts of the image that change with each frame are provided. +GIF 支持简单的动画，即在最初的全尺寸帧之后，提供一系列反映每帧图像变化部分的图像。 -GIF has been extremely popular for decades, due to its simplicity and compatibility. -Its animation support caused a resurgence in its popularity in the social media era, when animated GIFs began to be widely used for short "videos", memes, and other simple animation sequences. +几十年来，GIF 因其简洁性和兼容性而广受欢迎。在社交媒体时代，GIF 动画开始被广泛用于制作短“视频”、备忘录和其他简单的动画序列。 -Another popular feature of GIF is support for [interlacing](), where rows of pixels are stored out of order so that partially-received files can be displayed in lower quality. -This is particularly useful when network connections are slow. +GIF 的另一个流行特性是支持[隔行扫描]()，即像素行的存储顺序会被打乱，因此部分接收的文件可以较低的质量显示。这在网络连接速度较慢时尤其有用。 -GIF is a good choice for simple images and animations, although converting full color images to GIF can result in unsatisfactory dithering. -Typically, modern content should use [PNG](#png_便携式网络图形) for lossless _and_ indexed still images, and should consider using [APNG](#apng_animated_portable_network_graphics) for lossless animation sequences. +GIF 是简单图像和动画的不错选择，不过将全彩图像转换为 GIF 可能会导致不理想的抖动。通常情况下，现代内容应使用 [PNG](#png_ 便携式网络图形)制作无损*和*索引静态图像，并应考虑使用 [APNG](#apng_动态可移植网络图形) 制作无损动画序列。 @@ -488,13 +481,13 @@ Typically, modern content should use [PNG](#png_便携式网络图形) for lossl @@ -516,29 +509,29 @@ Typically, modern content should use [PNG](#png_便携式网络图形) for lossl - + - + - + - +
规范 - GIF87a specification
GIF89a specification + GIF87a 规范
GIF89a 规范
浏览器兼容性 - All versions of Chrome, Edge, Firefox, Internet Explorer, Opera, and Safari + Chrome、Edge、Firefox、Internet Explorer、Opera 和 Safari 浏览器的所有版本
灰度 n/aGIF does not include a dedicated greyscale format.GIF 不包括专用的灰度格式。
真彩色 n/aGIF does not support true color pixels.GIF 不支持真彩色像素。
索引颜色 8 - Each color in a GIF palette is defined as 8 bits each of red, green, and blue (24 total bits per pixel). + GIF 调色板中的每种颜色定义为红、绿、蓝各 8 位（每个像素共 24 位）。
带有灰度的真彩色 n/aGIF does not provide a dedicated greyscale format.GIF 不提供专用的灰度格式。
带有透明度的真彩色 n/aGIF does not support true color pixels.GIF 不支持真彩色像素。
@@ -551,8 +544,7 @@ Typically, modern content should use [PNG](#png_便携式网络图形) for lossl 授权 - While the GIF format itself is open, the LZW compression algorithm was covered by patents until the early 2000s. - As of July 7, 2004, all relevant patents have expired and the GIF format may be used freely + 虽然 GIF 格式本身是开放的，但 LZW 压缩算法在本世纪初之前一直受专利保护。截至 2004 年 7 月 7 日，所有相关专利都已过期，GIF 格式可以自由使用。 @@ -560,24 +552,18 @@ Typically, modern content should use [PNG](#png_便携式网络图形) for lossl ### ICO（Microsoft Windows 图标） -The ICO (Microsoft Windows icon) file format was designed by Microsoft for desktop icons of Windows systems. -However, early versions of Internet Explorer introduced the ability for a website to provide an ICO file named `favicon.ico` in a website's root directory to specify a **[favicon](/en-US/docs/Learn/HTML/Introduction_to_HTML/The_head_metadata_in_HTML#adding_custom_icons_to_your_site)** — an icon to be displayed in the Favorites menu, and other places where an iconic representation of the site would be useful. +ICO（Microsoft Windows 图标）文件格式是微软为 Windows 系统的桌面图标而设计的。不过，早期版本的 Internet Explorer 允许网站在其根目录中提供名为 `favicon.ico` 的 ICO 文件，以指定一个 **[favicon](/zh-CN/docs/Learn/HTML/Introduction_to_HTML/The_head_metadata_in_HTML#在你的站点增加自定义图标)**——一个显示在收藏夹菜单和其他对网站图标有用的地方的图标。 -An ICO file can contain multiple icons, and begins with a directory listing details about each. -Following the directory comes the data for the icons. -Each icon's data can be either a [BMP](#bmp_位图文件) image without the file header, or a complete [PNG](#png_便携式网络图形) image (including the file header). -If you use ICO files, you should use the BMP format, as support for PNG inside ICO files wasn't added until Windows Vista and may not be well supported. +一个 ICO 文件可以包含多个图标，文件开头有一个目录，列出每个图标的详细信息。目录之后是图标的数据。每个图标的数据既可以是不带文件头的 [BMP](#bmp_ 位图文件) 图像，也可以是完整的 [PNG](#png_ 便携式网络图形) 图像（包括文件头）。如果使用 ICO 文件，则应使用 BMP 格式，因为直到 Windows Vista 才添加了对 ICO 文件内的 PNG 的支持，而且这种支持可能并不完善。 -> **警告：** ICO files _should not_ be used in web content. -> Additionally, their use for favicons has subsided in favor of using a PNG file and the {{HTMLElement("link")}} element, as described in [Providing icons for different usage contexts](/en-US/docs/Web/HTML/Element/link#providing_icons_for_different_usage_contexts). +> **警告：** ICO 文件*不应*用于网页内容。此外，如[为不同的使用环境提供图标](/zh-CN/docs/Web/HTML/Element/link#提供用于不同用法上下文的图标)所述，它们在收藏夹中的使用已经减少，转而使用 PNG 文件和 {{HTMLElement("link")}} 元素。 @@ -591,7 +577,7 @@ If you use ICO files, you should use the BMP format, as support for PNG inside I @@ -603,7 +589,7 @@ If you use ICO files, you should use the BMP format, as support for PNG inside I - + - + - + @@ -1028,7 +1009,7 @@ It's not generally useful for strictly bitmap or photographic images, although i - + @@ -1039,7 +1020,7 @@ It's not generally useful for strictly bitmap or photographic images, although i - + @@ -1048,7 +1029,7 @@ It's not generally useful for strictly bitmap or photographic images, although i - + @@ -1166,7 +1147,7 @@ As such, TIFF files are not useful within the context of web content, _but_ it's @@ -1277,7 +1258,7 @@ Provide a fallback in either [JPEG](#jpeg_联合图像专家小组图像) or [PN - + @@ -1286,7 +1267,7 @@ Provide a fallback in either [JPEG](#jpeg_联合图像专家小组图像) or [PN - + @@ -1350,7 +1331,7 @@ static unsigned char square8_bits[] = { - + @@ -1358,15 +1339,15 @@ static unsigned char square8_bits[] = { - + - + - +
MIME 类型 - image/vnd.microsoft.icon (official), - image/x-icon (used by Microsoft) + image/vnd.microsoft.icon（官方格式），image/x-icon（由 Microsoft 使用）
浏览器兼容性 - All versions of Chrome, Edge, Firefox, Internet Explorer, Opera, and Safari + Chrome、Edge、Firefox、Internet Explorer、Opera 和 Safari 浏览器的所有版本
@@ -615,40 +601,40 @@ If you use ICO files, you should use the BMP format, as support for PNG inside I - + - + - + - +
- Icons in BMP format + BMP 格式的图标
灰度 1 - Each bit represents a single pixel, which can be either black or white. + 每个比特代表一个像素，可以是黑色或白色。
真彩色8 and 168 和 16 - Each pixel is represented by three values representing the red, green, and blue color components; each is D bits. + 每个像素由三个值表示，分别代表红色、绿色和蓝色，每个值为 D 位。
索引颜色2, 4, and 82、4 和 8 - Each pixel is represented by a value which is one 2, 4, or 8 bits, serving as an index into the color table. + 每个像素由一个 2、4 或 8 位的值表示，作为色彩表的索引。
带有灰度的真彩色 n/aBMP has no distinct grayscale format.BMP 没有明显的灰度格式。
带有透明度的真彩色8 and 168 和 16 - Each pixel is represented by four values representing the red, green, blue, and alpha color components; each is D bits. + BMP 没有明显的灰度格式。每个像素由四个值表示，分别代表红、绿、蓝和 Alpha 颜色分量；每个值为 D 位。
@@ -660,39 +646,35 @@ If you use ICO files, you should use the BMP format, as support for PNG inside I - + - + - + - + @@ -702,8 +684,7 @@ If you use ICO files, you should use the BMP format, as support for PNG inside I @@ -741,7 +722,7 @@ The JFIF (**J**PEG **F**ile **I**nterchange **F**ormat) specification describes @@ -769,7 +750,7 @@ The JFIF (**J**PEG **F**ile **I**nterchange **F**ormat) specification describes @@ -843,49 +824,49 @@ This slowed PNG adoption, but it is now commonly used, especially when precise r - + - + - + - + - - - + + + - + - - - + + + - - + + - - + + - + - +
- Icons in PNG format + PNG 格式的图标
灰度 1, 2, 4, 8, and 16 - Each pixel consists of a single D-bit value indicating the brightness of the greyscale pixel. + 每个像素由一个 D 位值组成，表示灰度像素的亮度。
真彩色8 and 168 和 16 - Each pixel is represented by three D-bit values indicating the level of the red, green, and blue color components. + 每个像素由三个D位值表示，分别代表红、绿、蓝三色的色阶。
索引颜色1, 2, 4, and 81、2、4 和 8 - Each pixel is a D-bit value indicating an index into a color palette which is contained within a - PLTE - chunk in the APNG file; the colors in the palette all use an 8-bit depth. + 每个像素都是一个 D 位值，表示调色板的索引，调色板包含在 APNG 文件的 PLTE 块中；调色板中的颜色都使用 8 位深度。
带有灰度的真彩色8 and 168 和 16 - Each pixel is represented by two D-bit values: the - intensity of the greyscale pixel and an alpha sample, indicating how opaque the pixel is. + 每个像素由两个 D 位值表示：灰度像素的强度和表示像素不透明程度的 Alpha 样本。
带有透明度的真彩色8 and 168 和 16 - Each pixel is comprised of four D-pixel color - components: red, green, blue, and the alpha sample indicating how opaque the pixel is. + 每个像素由四个 D 像素颜色成分组成：红色、绿色、蓝色和表示像素不透明程度的 alpha 样本。
压缩 - BMP-format icons nearly always use lossless compression, but lossy methods are available. - PNG icons are always compressed losslessly. + BMP 格式的图标几乎总是使用无损压缩，但也有有损压缩方法。PNG 图标始终使用无损压缩。
浏览器兼容性 - All versions of Chrome, Edge, Firefox, Internet Explorer, Opera, and Safari + Chrome、Edge、Firefox、Internet Explorer、Opera 和 Safari 浏览器的所有版本
真彩色 8 - Each pixel is described by the red, blue, and green color components, each of which is 8 bits. + 每个像素由红、蓝、绿三种颜色分量描述，每种颜色分量为 8 位。
Basic support基本支持 1 12 1 53.5.1 (Presto)
15 (Blink)		3.5.1（Presto）
15（Blink）		 1
Alpha channelAlpha 通道 1 12 1 56 (Presto)
All (Blink)		6（Presto）
所有（Blink）		 1
Gamma correctionnoyes伽玛校正否是 1 8 1broken损坏的
Color correctionnoyes颜色校正否是 3 9nono否否
Interlacingno插帧否 ? 1broken损坏的 3.5.1no否
@@ -911,12 +892,12 @@ This slowed PNG adoption, but it is now commonly used, especially when precise r 		灰度 1, 2, 4, 8, and 16 - Each pixel consists of a single D-bit value indicating the brightness of the greyscale pixel. + 每个像素由一个 D 位值组成，表示灰度像素的亮度。
真彩色8 and 168 和 16 Each pixel is represented by three D-bit values indicating the level of the red, green, and blue color components. @@ -934,7 +915,7 @@ This slowed PNG adoption, but it is now commonly used, especially when precise r
带有灰度的真彩色8 and 168 和 16 Each pixel is represented by two D-bit values: the intensity of the greyscale pixel and an alpha sample, indicating how opaque the pixel is. @@ -942,7 +923,7 @@ This slowed PNG adoption, but it is now commonly used, especially when precise r
带有透明度的真彩色8 and 168 和 16 Each pixel is comprised of four D-pixel color components: red, green, blue, and the alpha sample indicating how opaque the pixel is. 12 3 910 (Presto)
15 (Blink)		10（Presto）
15（Blink）		 3.2
12 4 910 (Presto)
15 (Blink)		10（Presto）
15（Blink）		 9
最大尺寸Unlimited无限制
支持的颜色模式灰度 4 and 8 - Each pixel consists of a single D-bit value indicating the brightness of the greyscale pixel. + 每个像素由一个 D 位值组成，表示灰度像素的亮度。
18 65 no11.10 (Presto)
15 (Blink)		11.10（Presto）
15（Blink）		 14
18 65 no12.10 (Presto)
15 (Blink)		12.10（Presto）
15（Blink）		 14
MIME 类型image/xbm, image-xbitmapimage/xbm、image-xbitmap
文件扩展名
规范None无
浏览器兼容性Firefox 1–3.5, Internet Explorer 1–5Firefox 1–3.5、Internet Explorer 1–5
最大尺寸Unlimited无限制
支持的颜色模式