What are the common formats for images?

Picture format is the format used by computers to store pictures. Common storage formats include bmp, jpg, png, gif, svg, psd, ai, TIFF, webp, EPS, etc.

1. Webp format

WebP (pronounced "weppy") is an image file format that provides both lossy and lossless compression. It is derived from the image encoding format VP8 . It is a format developed after Google purchased On2 Technologies and is released under BSD licensing terms.

WebP is a new imaging technology launched by Google. It can effectively compress web page images without affecting image format compatibility and actual definition, thereby speeding up the overall web page download speed.

2. BMP format

Bitmap (foreign language abbreviation: BMP, foreign language full name: BitMaP) BMP is an image file format that is independent of hardware devices and is widely used. It uses a bit-mapped storage format and does not use any other compression except for the optional image depth. Therefore, the BMP file takes up a lot of space. The image depth of BMP files can be selected from lbit, 4bit, 8bit and 24bit. When BMP files store data, the image is scanned from left to right and bottom to top.

3. GIF format

Graphics Interchange Format (foreign language abbreviation: GIF, foreign language full name: Graphics Interchange Format) is an image file format developed by CompuServe in 1987. The data of the GIF file is a continuous tone lossless compression format based on the LZW algorithm. Its compression rate is generally around 50%, and it does not belong to any application. Almost all relevant software supports it, and there are a large number of software in the public domain that use GIF image files.

4. JPEG format

JPEG (full name is Joint Photographic Experts Group) is a common image format. It was developed by the Joint Photographic Experts Group and named "ISO 10918- 1", JPEG is just a common name.

JPEG is a lossy compression format that can compress images into a small storage space. Repeated or unimportant data in the image will be lost, thus easily causing damage to the image data. In particular, using an excessively high compression ratio will significantly reduce the quality of the image restored after final decompression. If you pursue high-quality images, it is not advisable to use an excessively high compression ratio.

5. PNG format

Portable Network Graphics (referred to as PNG in foreign languages, full name in foreign languages: Portable Network Graphics) is the latest image file format accepted on the Internet. PNG can provide lossless compressed image files that are 30% smaller than GIF. It provides both 24-bit and 48-bit true color image support as well as many other technical supports. Since PNG is very new, not all programs can use it to store image files, but Photoshop can handle PNG image files and can also store them in the PNG image file format.

6. SVG format

Scalable vector graphics (abbreviated as SVG in foreign languages, full name in foreign languages: Scalable Vector Graphics). It is based on XML (a subset of Standard Universal Markup Language) and was developed by the World Wide Web Consortium. An open standard vector graphics language that can be arbitrarily enlarged for graphic display. The edges are extremely clear. The text remains editable and searchable in the SVG image. There are no font restrictions. The generated file is small and downloads quickly, which is very suitable. For designing high-resolution web graphics pages.

7. PSD format

PhotoShopDocument (PSD) This is a special file format for Photoshop image processing software. The file extension is. psd, which can support various image features of layers, channels, masks and different color modes, is a non-compressed original file saving format. The scanner cannot directly generate files in this format. PSD files sometimes have a large capacity, but since all original information can be retained, it is the best choice to save images in PSD format during image processing that have not yet been completed.

8. AI format

AI format is a vector graphics file suitable for Adobe's ILLUSTRATOR output format. Like PSD format files, AI is also a layered file. Each object is independent and has its own attributes, such as size, shape, outline, color, position, etc. Files saved in this format are easy to modify and can be output at the highest resolution at any size. It has relatively high compatibility and can be opened in CorelDRAW and can also export CDR format files to AI format.

9. TIFF format

Tag Image File Format, abbreviated as TIFF. It is a flexible bitmap format mainly used to store images including photos and artwork. It was originally developed by Aldus Corporation in conjunction with Microsoft Corporation for PostScript printing. TIFF joins JPEG and PNG as a popular high-bit color image format.

10. EPS format

Encapsulated page description language (foreign language abbreviation: EPS, foreign language full name: Encapsulated PostScript) is a cross-platform standard format, and the extension is on the PC platform yes. eps, on the Macintosh platform. epsf, mainly used for the storage of vector images and raster images. Apple Mac users use it more.

EPS format is described in PostScript language and can save other types of information, such as multiple tone curves, Alpha channels, color separations, clipping paths, screen information and tone curves, etc. Therefore, the EPS format is often used for printing or printout. . Multiple EPS format options in Photoshop allow for comprehensive control over print printing, even better than the TIFF format in some cases.

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