JPEG 和 PSD 的区别

1. 联合图像专家组(JPEG)：
自 1982 年 6 月以来，ISO 的第 8 工作组 (WG8) 一直致力于制定静态图像的压缩和解压缩标准。 1987 年 6 月，提出了十种不同的彩色和灰度静止图像编码技术。基于离散余弦变换(DCT)的自适应变换编码技术取得了最好的主观效果。

PEG 适用于彩色和灰度静止图像。视频序列也可以通过静态图像的 fest 编码和解码来处理，这种技术称为 Motion JPEG。

2. Photoshop 文件 (PSD) :
PSD 代表“Photoshop 文档”，它是一种特定于应用程序的专有格式，但由于 Photoshop 在像素编辑领域的主导地位，PSD 已成为某种准标准。许多其他程序，甚至一些不是来自 Adobe 的程序，支持 PSD 作为附加文件格式 – 但通常作为只读或用于导入/导出目的，而不是作为其真正的原生文件格式。

JPEG 和 PSD 的区别：

S.No.	JPEG	PSD
1.	JPEG is the actually a standard format that is not tied to any application. Virtually all programs that deal with images are able to open and save in the JPEG format.	PSD is the native file format for a Photoshop. In PSD, you only have Photoshop that can open the file.
2.	It is a standard image format.	It is the document format for Photoshop.
3.	It can be viewed in a lot of applications.	It can not viewed in a lot of applications.
4.	It does not support layers.	It supports layers.
5.	It is supported by gadgets.	It is not supported by gadgets.
6.	It is less longer then PSD.	It is lot larger than JPEG.
7.	A JPEG is just a compressed bitmap.	while a PSD is PhotoShop file and thus retains all the project information such as the layers and history.
8.	It is compressed single layer image.	It is PhotoShop Document. It is an image with the editing layers saved with it.
9.	It is less popular photo editing software.	It is very popular photo editing software.