How can I find an object distance in an image??

Question

Tomas 2012-12-8

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/56068-how-can-i-find-an-object-distance-in-an-image

在 MATLAB Online 中打开

Hi,To find the an object distance (working distance) in an image, I can do this

object distance = focal length*((1/magnification) + 1)

thanks

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Jan 2012-12-8

Currently I do not see the relation between your question and Matlab. Because this is a Matlab forum, your problem might be off-topic.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Jürgen 2012-12-8

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/56068-how-can-i-find-an-object-distance-in-an-image#answer_67917

编辑：Jürgen 2012-12-8

hi, first Your question is not clear? second, on a single image you can not extract object distance,=> you need stereovision, or other techniques like depth from focus or special cameras( Time Of Flight) I suppose you refer to the thin lens equation but this is only for an object in focus

regards, J

3 个评论
显示 1更早的评论隐藏 1更早的评论

Jürgen 2012-12-8

Hi, to be honnest I do not have the time to read the link but for me: image distance is the distance between the plane where the image is formed and the lens center, and object distance is the distance between the object in focus and the lens center , camera distance is not so clear define for me , I do not use it actually, if you want to do measurements on images start by looking at the pinhole camera model , there you have the image plane at focal length of the lens center

Jan 2012-12-8

编辑：Jan 2012-12-8

@Thomas: Please read the text of the posted link again. The term "camera distance" is defined and in the previous chapter you find "image distance" also.

请先登录，再进行评论。