如何减少图像文件大小 [英] how to reduce image filesize

问题描述

我有关于如何减少图像文件大小而不是图像调整大小的问题。缩小图像文件大小与原始图像高度和宽度我有谷歌它但我没有找到适当的解决方案任何人帮助我



预付谢谢

i have issue about how to reduce image filesize not a image resize.reduce image file size with orignal image hight and width i have google it but i do't have found proper solution anybody plase help me

advance thank

推荐答案

取决于原作是什么，你想用它做什么，以及图像有多少退化您可以接受的质量。



如果原件是位图，您可以非常有效地使用ZIP压缩它，并且没有质量。或者你可以将它转换为无损压缩图像类型，如PNG，再次失去质量。



如果原件是有损格式，如JPG，那么你有什么使用它几乎肯定不会减小尺寸，除非质量也降低 - 即使读取JPG并再次保存它也会在较大或较小程度上损失图像质量。



如果图像质量如果不那么重要，那么TIF，JPG和GIF格式都使用压缩并且可以大大缩小文件大小 - 但是他们通过丢弃眼睛无法看到的信息来做到这一点，这个如果您要将图像用于任何需要高分辨率的图像，例如图形设计或打印制作，可以产生戏剧效果。



没有魔弹缩小任何东西 - 如果有的话，我们只会使用它十几次，并为每部电影发送1K文件！ ：笑：

Depends on what the original is, what you want to use it for, and how much degradation in image quality you can accept.

If the original is a bitmap, you can compress it with ZIP pretty effectively, and loose no quality. Or you can convert it to a lossless compression image type such as PNG and again lose not quality.

If the original is a lossy format such as JPG, then anything you do with it will almost certainly not reduce size, unless the quality is also reduced - even reading a JPG and saving it again will lose you image quality to a greater or lesser extent.

If image quality if not that important, then TIF, JPG and GIF formats all use compression and can dramatically shrink the file size - but they do this by "throwing away" information that the eye can't really see, and this can have dramatic effects if you are going to use the image for anything that needs high resolution, such as graphics design or print production.

There is no "magic bullet" to shrinking anything - if there was, we'd just use it a dozen times, and send a 1K file for every movie! :laugh:

你搜索不好。我在 Google搜索链接 [ ^ ]。压缩图像将减小文件大小，而不是文件的高度和宽度。您需要努力寻找最适合您的压缩级别。

You have not searched well. I see some solutions in the very first page of Google search link[^]. Compressing an image will decrease the file size and not it's height and width. You will need to work on finding the compression level that works best for you.

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