What Are the Different Types of Digital Picture Storage?

The image format is the format in which the image files are stored, usually JPEG, TIFF, RAW, BMP, GIF, PNG, etc. Because digital cameras take large image files and have limited storage capacity, images are usually compressed and stored.

Picture file format

BMP Picture file format BMP

BMP (Window standard bitmap) is one of the most common bitmap formats and is also a standard format under the Window system. It is a file that saves the bitmap displayed under Window in a lossless form. Quality, but the file size is relatively large.

JPG/JPEG Picture file format JPG / JPEG

(Joint Graphics Expert Picture Format) Best for photos and pictures that use true color or smooth transitions. This format uses lossy compression to reduce the size of the picture, so users will see that as the file is reduced, the quality of the picture is also reduced. When the picture is converted to a .jpg file, the transparent areas in the picture will be converted to solid colors.

PNG Picture file format PNG

(Portable network graphics format) suitable for any type of picture of any color depth. You can also use PNG to save pictures with palette. This format uses lossless compression to reduce the size of the picture, while retaining transparent areas in the picture, so the file is also slightly larger. Although this format is suitable for all pictures, some web browsers do not support it.

GIF Picture file format GIF

GIF (Graphics Interchange Format) is best used for clip art of line drawings (such as up to 256 colors) and pictures using large solid colors. This format uses lossless compression to reduce the size of the picture. When the user wants to save the picture as a .GIF, he can decide whether to save the transparent area or convert to a solid color. At the same time, through the conversion of multiple pictures, GIF format can also save animation files. But please note that GIF can only support 256 colors at most

At present, the more commonly used image formats on the web page are two image compression formats, gif and jpg (jpeg). Because they load quickly on the Internet, all newer image software supports GIF and JPG formats. Therefore, it is necessary to To create a GIF or JPG picture, you only need to save the picture in the image software in these two formats.

GIFJPEG Comparison of image file formats GIF and JPEG

But which of GIF and JPEG is better? The answer is, it depends on the situation of the graphics. Need to consider both the size of the graphics and the download rate.

One of your basic considerations is the type of graphics used. If the graphics use a lot of colors, especially different colors intersect each other, it is best to use JPEG format. If the colors of the graphics used are relatively simple, GIF format should be used.

Multi-color graphics use the JPEG format because JPEG can save millions of colors, while GIF is limited to 256 colors. Another important issue is the size of the file. JPEG allows a larger compression ratio. GIF has a smaller compression ratio. For larger graphics, JPEG should be used. JPEG can almost maintain the original appearance of graphics.

GIF can do things that JPEG can't. For example, you can interleave GIFs. The interlaced GIF graphics can be downloaded in low definition first, and then gradually become clear. In this way, the reader can quickly see what graphic it is. JPEG can only be downloaded line by line, and the entire graphic can not be seen until the full image is downloaded.