如何使用c＃编码找到原始照片 [英] How to find the photograph is original using c# coding

问题描述

请帮我看看如何使用C＃编码找到原始照片或photoshopped照片。我看过很多程序都可以提取exif标签，但是找不到可以查看照片是否是原创的程序。



请帮助我。



问候

Gsudha

Hi,

Please help me how to find a photograph is original or photoshopped using C# coding. I seen many programs are there which can extract exif tags but not able to find the program which can find whether the photograph is original or not.

Please help me.

Regards
Gsudha

推荐答案

你可以试试JPEG snoop [ ^ ] - 但它仅限于jpeg，我不知道它有多有效。



所有它需要愚弄它正在编辑EXIF数据。



一些服务

图片编辑 [ ^ ]



Fotoforensics [ ^ ]

You can try JPEG snoop[^] - but it is limited to jpegs and I have no idea how effective it is.

All it would take to fool it is editing EXIF data.

Some services
Image edited[^]

Fotoforensics[^]

对于ex来说这是微不足道的道EXIF和任何其他元数据。但是伪造它并不困难。你怎么能想到这样一个无用的想法？



但是，检测相机之外的原始图像和数字处理原始图像之间差异的技术确实存在。我读过它。像素内部的子像素的精确固定和众所周知的布局，以及CCD或CMOS物理，在像素值中产生阈下相关性。如果使用任何全局调整，这种相关性会立即被破坏，例如颜色转换（几乎总是在后处理中完成）。



如果你可以使用这个想法，请使用if。



但是，您应该明白这仅适用于原始图像。在现代相机中，在图像已经数字化之后可以进行大量处理。当然，它不能用于检测抄袭，因为原作者通常至少进行最少的后处理。



因此，该技术主要用于以下情况：照片可用于法律证据。如果您需要法律文件，请原始拍摄。

-SA

It's trivial to extract EXIF and any other metadata. But is not much harder to fake it. How could you even think of such a useless idea?

But the technology which detects the difference between raw images out-of-camera and digitally process one does exist. I've read about it. The exact fixed and well-known layout of the sub-pixels inside a pixel, as well as CCD or CMOS physics, create subliminal correlation in pixel values. This correlation is immediately destroyed if any global tuning is used, such as color transform (which is done almost always in post-processing).

If you can use this idea, please use if.

However, you should understand that this is valid only for raw images. In modern cameras, a lot of processing can be done after the image is already digitized. And of course, it cannot be used to detect plagiarism, because original authors usually do at least minimal post-processing.

So, the technology is mostly used in cases where a photograph can be useful in legal evidence. When you need legal document, shoot in raw.

—SA

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