图像背景替代 [英] image background subraction

问题描述

我要删除图像背景，然后将其中任何一个显示为另一个背景

我是网上新手，请给我个主意


在此先感谢
Dineshkumar R

i want remove image background and display into another background any one

i am new one in net please give idea for me


thanks in advance
Dineshkumar R

推荐答案

我很疲倦地与看过此类工作的许多实际示例但不了解问题本质的人争论这个话题. 以100％的逼真度解决这个问题在理论上是不可能的.这是不适定的问题之一.造成这种情况的原因有多种，但最简单的原因之一是:没有可靠的标准可以从前台说出背景，也没有严格定义它的方法.还有许多其他困难，其中一些是根本性的，一些是实际的.严格来说，要渲染修改后的场景，您需要一个完整的场景和照明3D模型，并且在照片上，很多信息已经丢失.

现在，由于存在一些实际的解决方案，问题是:它们足够好吗?这是我的答案:这取决于谁在看.如果一个人有照片编辑甚至绘画的经验，他或他将立即发现伪造品.以我自己:我在照片编辑方面经验不是很丰富，但是在不久的将来，我在照片编辑器上度过了愉快的时光.那又怎样我几乎可以立即检测到通过任何自动方法执行的所有高质量图像中的错误变换.同时，当一个很好的大师手动完成伪造时，我可能看不到它.根据对图像所做的通常假设，我们的人类在图像识别方面相当出色，因此我们所有人都可以很好地进行伪造.没有自动处理.真正的大师即使由照片伪造大师完成伪造，也可以检测到伪造.

同时，在低质量图像上很难发现伪造.如果您想要草率的俗气的低分辨率或低质量的图像，则可以尝试使用它(我实际上尝试过，而且还不至于太糟.)您知道，问题太难了，无法希望它又快又脏解决方案只是我们的好奇心-仍然需要一些艰苦的工作.从另一方面来看，预期的结果太无聊了，根本无法理会它们.我的建议是:不要打扰！

—SA

I''m tired to argue over this topic with people who saw many practical examples of such work but do not understand the essence of the problem. Solving this problem with 100% fidelity is theoretically impossible. This is one of the ill-posed problem. There are several reasons for that, but one of the most simple reason is this: there are no reliable criteria to tell a background from a foreground, there is no way to strictly define it. There is a number of other difficulties, some of them are fundamental, some are practical. Strictly speaking, to render modified scene, you need a complete 3D model of the scene and lighting, and on a photograph, a lot of information is already missing.

Now, as some practical solution do exist, the question is: are they good enough? Here is my answer: it depends on who is looking. If a person is experienced in photo editing or even in painting, she or he will detect an forgery in no time. Take myself: I''m not very experienced in photo editing, but in near past I spent a good time at photo editors. And what? I can detect false transformation in all high-quality images performed by any automatic methods almost immediately. At the same time, I can fail to see the forgery when it is done manually by a pretty good master. We human being are quite good in image recognition based on usual assumptions done on the image, so best of us can do the forgery very well. Not the automatic processing. And real masters can detect the forgery even if they are done by a photo forgery master.

At the same time, on low-quality images the forgery is hard to spot. If you want sloppy cheesy low-resolution or low-quality images, you can try to go in for it (I actually tried, and it was not to worst.) You see, the problem is too difficult to hope for a quick and dirty solution just our of curiosity — it will still require some hard work. From the other hands, the expected results would be too boring to bother about them. My advice would be: don''t bother!

—SA

这篇关于图像背景替代的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！