一个简单的方法（工具？）比较图像像素的像素的不同格式？ [英] An easy way (tool?) to compare images pixel for pixel in different formats?

问题描述

我已经在java中编写了一个基本的无损jpeg文件，但我想把它生成的文件与原始文件进行比较。

只有在十六进制编辑器比较这么多，任何人都知道一个简单的方法，软件或java基础（最好是软件，因为我不觉得像任何更多的编码现在！），我可以比较两个图像，并产生一个差异图其中像素不一样？

感谢。

解决方案

感谢您的建议。

我尝试了Gimp方法，除非当图像之间的差异非常小时，工作良好。我找不到一个增强差异选项使差异显而易见，直方图也只是粗略表示差异。

最后我使用< a href =http://www.imagemagick.org/script/index.php =nofollow noreferrer> ImageMagick 我曾经安装了一段时间，忘了所有。创建差异/比较图像与输入一样简单：

 比较first.jpg second.png difference.gif 
 
 
 
 
这是非常好的解释
 此处 
 
Well I've written a basic lossless jpeg joiner thing in java now but I'd like to compare the files it produces with the original files.

I can only compare so much in a hex editor, does anyone know of an easy way, software or java based (preferably software as I dont feel like any more coding for now!) that I can compare two images and produce a "difference map" of where the pixels aren't the same?

Thanks.
解决方案
Thanks for the suggestions.

I tried the Gimp approach first which works well except when the difference between the images are very small. I couldn't find an "enhance differences" option to make the differences obvious and the histogram also only gives a rough representation of the differences.

In the end I used ImageMagick something I'd installed a while ago and forgot all about. Creating a difference/comparison image is as easy as typing:
 compare first.jpg second.png difference.gif
in the command line.

It's all nicely explained here.

                        
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