jpeg转换webp
在线计算网 · 收录于 2022-08-08 11:41:04
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文件扩展名.jpeg
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文件类别images
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程序Adobe PhotoshopApple PreviewCorel Paint Shop Pro
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主程序MS Paint
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说明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.
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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.
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MIME类型image/jpeg
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文件扩展名.webp
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文件类别images
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程序Adobe PhotoshopPicasa
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主程序Google Chrome
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说明谷歌已经开发在2010年这种格式;通过WebP的格式，它可以，随意，存储图像的格式是具有或不损失泄漏。根据他们的发言，这种格式最多可以将文件保存到比JPEG或PNG文件少了34％的就业机会。更有效的图像格式，可以增强网络增加开启全局上传速度的体验。
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技术细节以这种格式有损压缩是通过预测获得的。在此压缩，图像被分成一些块和预测是根据周围块的像素进行的。这里的主画面和预测之间的差是通过加密来记录。预测足以保证基本图像的任何真正的区别好，文件的大小减小。无损压缩是从先前已检查，以建立图像的其余部分的图像的部分来获得。
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MIME类型image/webp
