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转换工具 / 图像 / 转换成 PNG / JPEG 转换器 / PNG 于 JPEG

PNG 转换成JPEG

您可以使用免费的在线转换器将PNG图像转换为JPEG和许多其他格式。

如何转换 png 于 jpeg?

如何转换 jpeg 于 png?
第一步
下载 png-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

Portable Network Graphics

文件扩展名
.png
电子
描述|介绍
PNG 是一种光栅图形格式,是作为 GIF 的替代品开发的,它基于前一代产品的最佳功能,包括无损压缩和透明背景支持。PNG技术确保保留所有的编辑阶段和恢复步骤,同时保持质量。但是,它不允许一次将多张图片保存在一个文件中,这限制了它在动画图像开发中的使用。
技术细节
PNG 扩展名被提出来作为一种工具,有助于在万维网上传输和存储图像。该技术仅限于8位透明通道,因此,可以调颜色透明度(自不透明的到透明的)。它支持24位真彩色图像(RGB彩色图像)以及灰度级图像。但是,作为一种非专业的格式,PNG无法显示其他彩色空间。PNG格式文件可用许多程序打开,也可用自带的图片浏览器打开。PNG图像特点是所占空间小且质量好。
程序
Apple Preview
Microsoft Windows Photos
Adobe Photoshop CC
Corel Paint Shop Pro
Microsoft Windows Photo Gallery Viewer
主程序
Microsoft Paint
开发公司
PNG Development Group (donated to W3C)
MIME type
image/png

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