如何在不损失质量的情况下放大java中的图像？ [英] How might I enlarge image in java without losing quality?

问题描述

我正在使用Java中的图像。我有一组图像 - 比方说每个600x800像素。
我以100x100调整它们的大小，我在上面做了一些东西。现在我想在开始尺寸放大图像而不会失去我的变化和像素质量。这可能吗？

I am working with images in Java. I have a set of images - let's say 600x800 pixels each. I resize them at 100x100 and I make some stuff on it. Now I would like to enlarge the image at the beginning size without losing my changing and pixel quality. Is this possible?

推荐答案

没有。这也不是一个Java问题。你会怎么用图像编辑器做到这一点？如果你调整两次（特别是小于大一些），你将失去质量。

No. This also isn't really a Java question. How would you do this with an image editor? If you resize twice (especially smaller than larger), you're going to lose quality.

你最好的选择是保持原始分辨率，然后使用矢量图形绘制你需要什么 - 消除任何不必要的大小调整。 （IE，计算您需要绘制的内容，考虑当前大小 - 无需先调整大小为100x100。）这也将解决您在宽高比方面可能遇到的一些问题 - 就像您将100x100的大小调整回600x800，无论你添加什么，都会显得拉伸/更宽。

Your best bet is to keep the native resolution, then use vector graphics to draw what you need - eliminating any unnecessary resizing. (I.E., calculate what you need to draw, taking into account the current size - without first resizing to 100x100.) This will also fix some issues you're also probably seeing regarding the aspect ratios - as when you would resize from 100x100 back to 600x800, whatever you added is going to appear "stretched" / wider.

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