How can I calculate the size of an object from a set of photos with no reference point?
1 回表示 (過去 30 日間)
古いコメントを表示
I need to calculate the different aspect of an object in a photo where it is the sole thing in frame. I know its average total length but not what camera/distance/zoom was used.
Is it possible to calculate its different aspects solely from a small range of images, given that the object is at an angle?
0 件のコメント
回答 (1 件)
Image Analyst
2024 年 6 月 20 日
If you know the total length of some thing in the image, then you can compute the number of cm per pixel and then you can measure the distance between any two points assuming they're in close to the same optical plane of your reference measurement. However another image, like a close-up, will have a different value for cm per pixel and you can't use the same spatial calibration value as you got from the other image. You'd need a new know calibration distance in the new image.
See attached spatial calibration demo.
I don't know what a "different aspect" is in the context you've used it so you'd need to define that for us.
0 件のコメント
参考
カテゴリ
Help Center および File Exchange で Image Processing Toolbox についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!