图像处理：什么是遮挡？ [英] Image Processing: What are occlusions?

问题描述

我正在开发一个图像处理项目，在许多科学论文中都遇到了 occlusion 这个词，在图像处理的背景下，occlusion是什么意思？字典仅给出一般定义。谁能用图像作为上下文来描述它们？

I'm developing an image processing project and I come across the word occlusion in many scientific papers, what do occlusions mean in the context of image processing? The dictionary is only giving a general definition. Can anyone describe them using an image as a context?

推荐答案

遮挡意味着您想看到一些东西，但是可以吗？ t由于传感器设置的某些属性或某些事件。
确切地表现出来或如何处理问题会因当前的问题而变化。

Occlusion means that there is something you want to see, but can't due to some property of your sensor setup, or some event. Exactly how it manifests itself or how you deal with the problem will vary due to the problem at hand.

一些示例：

如果您正在开发一个跟踪对象（人，汽车，...）的系统，那么如果您跟踪的对象是被另一个对象隐藏（隐藏）。就像两个人互相走过，或者是在桥下行驶的汽车一样。
这种情况​​下的问题是当物体消失并再次出现时该怎么办。

If you are developing a system which tracks objects (people, cars, ...) then occlusion occurs if an object you are tracking is hidden (occluded) by another object. Like two persons walking past each other, or a car that drives under a bridge. The problem in this case is what you do when an object disappears and reappears again.

如果您使用的是测距相机 ，那么遮挡是您没有任何信息的区域。某些激光测距相机的工作原理是将激光束传输到要检查的表面上，然后进行摄像头设置，以识别该激光在最终图像中的碰撞点。这给出了该点的3D坐标。但是，由于相机和激光器不一定对齐，因此在检查的表面上可能会出现相机可以看到但激光无法击中（遮挡）的点。
这里的问题更多是传感器设置问题。

If you are using a range camera, then occlusion is areas where you do not have any information. Some laser range cameras works by transmitting a laser beam onto the surface you are examining and then having a camera setup which identifies the point of impact of that laser in the resulting image. That gives the 3D-coordinates of that point. However, since the camera and laser is not necessarily aligned there can be points on the examined surface which the camera can see but the laser can not hit (occlusion). The problem here is more a matter of sensor setup.

如果其中的一部分存在于立体成像中，则同样可能发生仅由两个摄像机之一看到的场景。从这些点显然无法收集范围数据。

The same can occur in stereo imaging if there are parts of the scene which are only seen by one of the two cameras. No range data can obviously be collected from these points.

可能还有更多示例。

如果您指定您的问题，那么也许我们可以定义这种情况下的遮挡以及它带来的问题

If you specify your problem, then maybe we can define what occlusion is in that case, and what problems it entails

这篇关于图像处理：什么是遮挡？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！