Length & Width measurement of an image in Millimeters

2013 2 9
3 个回答
回答已采纳
更新时间：2018 2 4
5 次查看（30 天）

0 个投票

I am able to get the length and width of an image in pixels only.I am in need of measuring the length & width in millimeters for pixels/mm for a text extraction algorithm. how to get the values in millimeter?

请先登录，再回答此问题。

 采纳的回答

Matt J
Matt J 2013-2-9

0 个投票

You could measure, physically, the dimensions of a letter of text and then measure the same letter's dimensions in pixels in your image. Then you could deduce the size of your pixels in mm.

2 个评论
显示 无 隐藏 无

Caroline David
Caroline David 2018-2-4
Is there a code for length measurements??
Matt J
Matt J 2018-2-4
No, there is no code for length measurements.

请先登录，再进行评论。

更多回答（2 个）

Vijay
Vijay 2013-2-9

0 个投票

Thats what i am not aware of how to measure the length & width in physical quantities.. all i get is in pixels only

4 个评论
显示 2更早的评论 隐藏 2更早的评论

Image Analyst
Image Analyst 2013-2-9
This should have been a comment, not an Answer. But anyway, you take a micrometer or ruler and lay it down on the thing you imaged - your piece of paper - and read off the length from the micrometer or ruler.
Vijay
Vijay 2013-2-10
I asked for help in matlab coding.. any functions that can measure physical length & breadth of the images for calculation of pixels/mm value.. i got a 1536x2048 image taken from a 3.1 megapixel camera i am in need to get the 1536x2048 in terms of millimeters for that calculation is there any method? or functions??
Vijay
Vijay 2013-2-10
Thanks image analyst i got your demonstration on spatial calibration. ill make sure to answer people who are asking the same question again and again thanks a lot..
Image Analyst
Image Analyst 2013-2-10
Where did you get my demo on spatial calibration?

请先登录，再进行评论。

类别

在 帮助中心 和 File Exchange 中查找有关 Image Processing and Computer Vision 的更多信息

产品

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by