What is the general format of pictures?

In what format are general pictures saved?

Pictures come in many formats, all of which are saved on demand.

Common ones are BMP, JPG, jpeg and JPEG, both of which are static.

Dynamic of gif format.

For artists and the like, there will be png format commonly used in engineering, which is characterized by transparent background.

What is the general format of pictures?

jpg.jpeg.gif.bmp。

What format is JPG?

JPG format is a common image compression format. The following is a detailed description. Please have a look at it sometime. I hope it helps you.

The advantage of JPG file is small size and good compatibility, because most programs can read this file, because JPG format is not only an industrial standard format, but also a standard file format of the web. JPG files have such convenient conditions, no wonder they are highly praised by amateur players. On the other hand, however, JPG is so small because some data will be lost when the file is created, which means that the file is created by "lossy" compression, which is why the file is so small.

If the digital camera uses JPG as the photo storage format, it can save valuable space, but the negative side must be clearly seen: everything that can be adjusted in the camera, such as color temperature, color balance and image clarity, is recorded in the file after being processed by the camera, and the post-adjustment can only be processed by photoshop, but the adjusted image quality will be lost.

JPEG has a good advantage in remote transmission. In order not to affect the naked eye, please do not reduce the compression ratio below 8. For LAN transmission, please use JPEG lossless compression (12) or directly use TIFF.

JPEG and TIFF are transferred on the best coated paper. On the premise that the JPEG compression index is 12, there is almost no difference between the two, and laymen and laymen (looking at the print dot matrix without a magnifying glass) can't tell the difference, because when the true color (more than 24 bits) is converted into the four-color mode of the print format, the loss of color information is much more than that when TIFF is converted into JPEG, so it is almost impossible for laymen and laymen to judge whether the picture is in JPEG format just by looking at the printed matter.

As far as printing is concerned, with the best color management software (the best COLOE in Germany) and the best printer technology (4 picoliters of ink drops), the quality of the output drawings is not as good as that of printed matter! Especially dark! But he can do it better than printing quality! But it's hard! JPEG has a good advantage in remote transmission. In order not to affect the naked eye, please do not reduce the compression ratio below 8. For LAN transmission, please use JPEG lossless compression (12) or directly use TIFF. JPEG and TIFF are transferred on the best coated paper. On the premise that the JPEG compression index is 12, there is almost no difference between the two, and laymen and laymen (looking at the print dot matrix without a magnifying glass) can't tell the difference, because when the true color (more than 24 bits) is converted into the four-color mode of the print format, the loss of color information is much more than that when TIFF is converted into JPEG, so it is almost impossible for laymen and laymen to judge whether the picture is in JPEG format just by looking at the printed matter.

As far as printing is concerned, with the best color management software (the best COLOE in Germany) and the best printer technology (4 picoliters of ink drops), the quality of the output drawings is not as good as that of printed matter! Especially dark! But he can do it better than printing quality! But it's hard! The general printer just has a very common color management program! The interpretation of color can not meet the professional requirements at all! Because the best COLOE software in China now costs about 24,000 yuan (everyone, give up the idea of buying pirated products, it's hardware encryption:), you can't expect thousands of printers in your home to install this software for you. When you think what you print is gorgeous and beautiful, I'm sorry, it's color distortion: (If you think what your printer prints is excellent, I'm sorry, then you need to study the chromaticity of pictures.) The full name of JPEG is Joint Photographic Experts Group, which is a committee under the International Organization for Standards (ISO) engaged in the formulation of still image compression standards. It formulated the first set of international still image compression standards: ISO10918-1,commonly known as JPEG. Compared with BMP and other formats, JPEG format with similar quality can make image files "slim" a lot, which is very convenient for transmission and storage, so JPEG format is very popular after its launch. With the development of network, JPEG has been widely used. At present, 80% of the pictures on the website are in JPEG format.

However, with the rapid growth of multimedia applications, the traditional JPEG compression technology ... & gt

What format are pictures usually stored in?

I. BMP format

BMP is the abbreviation of English Bitmap, which is the standard image file format in Windows operating system and can be supported by many Windows applications. With the popularity of Windows operating system and the development of rich Windows applications, BMP bitmap format is naturally widely used. This format is characterized by rich image information and almost no compression, but this leads to its inherent defect-occupying too much disk space. So BMP is popular on stand-alone computers at present.

Second, the GIF format

GIF is the abbreviation of English graphic interchange format. As the name implies, this format is used to exchange pictures. Actually, it's the same. In 1980s, puServe, a famous online information service organization in the United States, developed this GIF image format for the limitation of network transmission bandwidth at that time.

GIF format is characterized by high compression ratio and less disk space, so this image format has been widely used soon. At first, GIF was only used to store a single still image (called GIF87a). Later, with the development of technology, several still images can be stored at the same time to form a continuous animation, which became one of the few formats that supported 2D animation at that time (called GIF89a). In GIF89a, you can specify a transparent area to make the image have an extraordinary display effect and make GIF more beautiful. At present, a large number of color animation files used on the internet are mostly files in this format, also known as GIF89a format files.

In addition, considering the actual situation in network transmission, the GIF image format also adds a gradual display mode, that is, in the process of image transmission, users can first see the general outline of the image, and then gradually see the details of the image as the transmission process continues, thus adapting to the user's viewing psychology of "from hazy to clear". At present, a large number of color animation files used on the Internet are mostly files in this format.

However, GIF has a small disadvantage, that is, it can't store pictures with more than 256 colors. Nevertheless, this format is still widely used on the Internet, which is inseparable from the advantages of short GIF image files, fast download speed and animation composed of many image files of the same size.

Third, JPEG format.

JPEG is also a common image format, which was developed by the Joint Photographic Experts Group and named as "ISO10918-1". JPEG is just a common name. The extension of JPEG files is. Jpg or. Jpeg, its compression technology is very advanced. It uses lossy compression to remove redundant image and color data, and can display very rich and vivid images at the same time, in other words, it can get better image quality with the least disk space.

At the same time, JPEG is a very flexible format, which has the function of adjusting the image quality, allowing you to compress this file with different compression ratios. For example, we can compress the BMP bitmap file of 1.37MB to 20.3KB at most. Of course, we can find a balance between image quality and file size.

JPEG is widely used because of its excellent quality and performance, especially on the Internet and CD-ROM. At present, all kinds of browsers support JPEG as an image format. Because of its small file size and fast download speed, the web page can provide a large number of beautiful images in a short download time, and JPEG has naturally become the most popular image format on the network.

Fourthly, JPEG2000 format.

JPEG 2000 is also formulated by JPEG organization, and its official name is "ISO 15444". Compared with JPEG, JPEG 2000 has higher compression rate and is a new generation of still image compression technology with more new functions.

As an upgraded version of JPEG, JPEG2000 has a compression ratio about 30% higher than JPEG. Unlike JPEG, JPEG >>

What format are these pictures?

BMP:Windows Bitmap Windows Bitmap can store a single raster image with any color depth (from black and white to 24-bit color). Windows bitmap file format is compatible with other Microsoft Windows programs. It does not support file compression, nor does it apply to web pages. Generally speaking, the disadvantages of Windows bitmap file format outweigh the advantages. To ensure the quality of photo images, please use PNG files, JPEG files or TIFF files. BMP file is suitable for wallpaper in Windows. Advantages: BMP supports 1 bit to 24-bit color depth. BMP format is widely compatible with existing Windows programs (especially older programs). Disadvantages: BMP does not support compression, which will make the file very large. The Web browser does not support BMP files. Pcx:PC Brush PC Brush picture (also known as Z-Soft bitmap) stores a single raster image with any color depth. Brush drawing is more widely used in early Windows programs and programs based on MS-DOS. Brush drawing is compatible with many newer programs. PCX pictures support RLE internal compression. Advantages: PCX is a standard format between many Windows-based programs and MS-DOS-based programs. PCX supports internal compression. Disadvantages: Web browsers do not support PCX. PNG: Portable network graphics PNG pictures store a single raster image at any color depth. PNG is a platform-independent format. Advantages: PNG supports advanced lossless compression. PNG supports alpha channel transparency. PNG supports gamma correction. PNG supports interleaving. The latest web browsers support PNG. Disadvantages: Older browsers and programs may not support PNG files. As an Internet file format, PNG provides less compression than JPEG lossy compression. As an Internet file format, PNG does not support multi-image files or animation files. GIF format supports multi-image files and animation files. JPEG: JPEG images of Joint Photographic Experts Group store a single raster image in 24-bit color. JPEG is a platform-independent format that supports the highest level of compression. However, this compression is lossy. Progressive JPEG files support interleaving. You can increase or decrease the compression level of JPEG files. However, the file size is at the expense of image quality. The compression ratio can be as high as 100: 1. (JPEG format can easily compress files at the ratio of 10: 1 to 20: 1, and the image quality will not decrease. ) JPEG compression can handle realistic photographic works well. However, JPEG compression can not provide ideal results for simple works with few colors, strong contrast, solid borders or pure * * * fields. Sometimes the compression ratio is as low as 5: 1, which seriously loses the integrity of the picture. The reason for this loss is that JPEG compression scheme can compress similar tones well, but JPEG compression scheme can't handle the strong difference of brightness or pure * * * domain well. Advantages: Photographic works or realistic works support advanced compression. The file size can be controlled by variable compression ratio. Support interleaving (for progressive JPEG files). JPEG widely supports Internet standards. Disadvantages: Lossy compression will reduce the quality of the original image data. When you edit and resave a JPEG file, JPEG will mix the quality of the original picture data. This decline is cumulative. JPEG is not suitable for simple pictures with few colors, similar colors in a large area or obvious brightness difference. GIF: GIF pictures in graphic interchange format store single raster image data or multiple raster image data in 8-bit color or 256-color. GIF pictures support transparent, compressed, interlaced and multi-image pictures (animated GIF). GIF transparency is not ALP >>

What format are these pictures?

& lt-& gt； File format is a format for saving files in different ways. Photoshop supports dozens of file formats, so it can well support various applications. In Photoshop, the common formats are PSD, BMP, PDF, JPEG, GIF, TGA, TIFF, etc. Beginners had better take a look. I don't usually think this is very important. But you still have to be clear about when to use it for printing and cross-platform operation.

1.PSD format

PSD format is the inherent format of Photoshop. PSD format can open and save images faster than other formats, and well save layers, channels, paths, masks and compression schemes without data loss. However, few applications support this format.

2.BMP format

BMP(Windows Bitmap) format is the inherent format of Microsoft Pain developed by Microsoft, which is supported by most software. BMP format adopts a lossless compression method called RLE, which will not have any impact on image quality.

3.PDF format

PDF (Portable Document Format) is a file format created by Adobe Systems, which allows electronic documents to be viewed on the screen. PDF files can also be embedded in the HTML document of eb.

4.JPEG format

JPEG (short for Joint Photographic Experts Group) is the most commonly used image format. It is the most effective and basic lossy compression format, which is supported by most graphics processing software. JPEG images are also widely used to make web pages. If the image quality is not high, but you need to store a lot of pictures, then using JPEG is undoubtedly a good way. However, it is best not to use JPEG format for image output printing, because it improves the compression quality by damaging the image quality.

5.GIF format

GIF format is the most commonly used format for outputting images to web pages. GIF adopts LZW compression, and the color is limited to 256 colors. GIF format is represented by 87a and 89a codes. GIF87a strictly supports opaque pixels. GIF89a can control the transparency of those areas, thus greatly reducing the size of GIF. If you want to use GIF format, you must switch to indexed color mode so that the number of colors is 256 or less.

6.TGA format

TGA(Targa) format is the most widely used image file format on computer, which supports 32 bits.

7.TIFF format

TIFF(Tag Image File Format) was developed by Aldus in the early days of Mac to standardize scanned images. It is the most widely used image printing format on Mac and PC platforms. TIFF uses LZW lossless compression, which greatly reduces the size of the image. In addition, the most exciting function of TIFF format is to save channels, which is very beneficial for you to process images.

What is the format of high-definition pictures?

Friend, there are many formats here, such as JPG and GIF. Whether it is high-definition or not has little to do with the file format. The key is that the pixels of the picture are large enough, even in high definition. For example, the pictures above 2048*2048 are not in HD.

What are the formats of pictures?

Common ones are jpg gif bmp jpeg jpe and then; Psd eps png and so on, because there are many companies that design image formats, so there are so many image formats.

What format of pictures has good quality?

The picture quality in PNG format is good.

PNG is an image file storage format, which attempts to replace GIF and TIFF file formats and add some functions that GIF file formats do not have. The name of PNG comes from "Portable Network Graphics Format (PNG)", and there is an unofficial explanation that "PNG is not GIF", which is a bitmap file storage format, pronounced "ping".

When storing grayscale images with PNG, the depth of grayscale images can be as high as 16 bits, when storing color images, the depth of color images can be as high as 48 bits, and α channel data can also be stored as high as 16 bits. PNG adopts lossless data compression algorithm derived from LZ77. Because of its high compression ratio and small file size, PNG is generally used in JAVA programs, web pages or S60 programs.

Usually download pictures from the internet to your mobile phone. What format are these pictures?

JPG format, of course, bmp format and png format ~ these are the most commonly used and common ~