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转换工具 / 图像 / JPEG

转换JPEG

您可以使用免费的在线转换器将图片和照片转换成JPEG格式。

如何转换 于 jpeg?
第一步
下载 文件
从你电脑、Google云端硬盘、Dropbox中选择你想要的文件或将文件夹移动到此页
第二步
选择 «于 jpeg»
选择 jpeg 或您需要的任何其他格式 (支持包含超过 100 种常用文件格式)
第三步
下载你的 jpeg 文件
等到你的文件转换成你想要的格式后,就能下载 jpeg -文件
Joint Photographic Experts Group
文件扩展名
.jpeg
电子
描述|介绍
JPEG – is a popular graphic format, which is characterized by a high degree of compression, which leads to a decrease in image quality. It uses the technology of encoding of smooth color renditions, providing the ability to reduce the amount of data frequently during the recording of the image. Because of the small size it is requested by the owners of websites, allowing you to save the traffic effectively. It is also frequently used in memory cards of digital video cameras. The JPEG algorithm is optimally suitable for compressing photographs and pictures, in which realistic scenes with little contrast of colors are present. It is not recommended to use this format for compression of drawings and various kinds of graphics, since a strong contrast between a number of closely located pixels provokes the appearance of visible artifacts.
技术细节
The procedure for compressing the digital images in JPEG format is carried out in several stages. First, the photo is transformed into a color space YCbCr, then it is divided into squares to determine the upper range of the color spectrum. Finally, the colors and brightness are coded. JPEG uses a "lossy" compression system and discrete cosine transform technology. The format acts simultaneously as the standard of ISO and the International Telecommunication Union. The file compression ratio is in the range from 10:1 to 100:1. In this case, the reduction in image quality can vary from insignificant to substantial.
程序
Adobe Photoshop
Apple Preview
Corel Paint Shop Pro
主程序
MS Paint
开发公司
The JPEG Committee
MIME type
image/jpeg