Measure the size of an object | with Opencv, Aruco marker and Python

can we measure the height and width of the human using this?

'HomogeneousBgDetector' is not defined and getting error

Must the size of the object be known before the detection?

thank you

Update : the code has changed if you try to run this code, you must change lines of CV2 to be

Hi, I was doing everything right butr my "corners, _, _" are returning an enpty [ ]. Cna u help me?

hello there, someone to help me out here, I am getting this error,
aruco_dict = cv2.aruco.Dictionary_get(cv2.aruco.DICT_5X5_50)
AttributeError: module 'cv2.aruco' has no attribute 'Dictionary_get'. Did you mean: 'Dictionary'?

Hello, it's very nice. Your development seems to work very well with square and rectangular objects. Now, what happens if the object doesn't have that shape? For example, a wood shaving, a small piece of paper cut by hand, some shapeless pieces of plastic.

why sometimes the frame turns black randomly? Im using logitech USB webcam on win7

Excuse me, How can I get object_detector library?

Hi how are things ! Excellent video, sorry I have a question when adding "parameters = cv2.aruco.DetectParameters_create()
aruco_dict = cv2.aruco.Dictionary_get(cv2.aruco.DICT_5X5_50)" I get an error: ttributeError: module 'cv2.aruco' has no attribute 'DetectParameters_create' could you guide me with this question?

Hi @Pysource. Does your camera have a depth sensor? Can we use any type of camera to capture the dimensions? Thank you in advance

Great tutorial! Quick question: Does this mean that if I have a custom dataset of images with objects I want to measure the size of, I have to ensure that when the images were captured, the aruco marker was equally captured with the other objects so it can serve as the reference point for the pixel to cm ratio? If yes, then won't this be a limitation in cases where you can't afford to capture the aruco marker with the actual objects you want to measure?

Looking forward to your response.

Really usefull video. I have some problems with aruco library. I think they put it out from cv librarry?

I have used your code already it was helpful But now I am getting this error

module 'cv2.aruco' has no attribute 'DetectorParameters_create'

I have tried to uninstall and re-install Opencv-contrib, but error still persists. any idea ?

try some white objs😄

hello, i had a question, how can i install object_director? or how can i install it?

thanks a lot!

Is a certain color of background required for this to work properly? I'm having mixed results on various colors of background...

download and import my file link in description below...
its not in the description

is the size of aruko marker in the sheet is exactly 5X5 Cm ?

sir i have doubt
in static image like only mobile, if we detect mobile and put boundary box, can we change the size of mobile after detected
thank you

Would it be possible to take the shape outline of the object and turn it into a correctly scaled vectored image?

Could you send me link to download aruco marker you use in this video?

Excellent tutorial. Could you tell me what software's name you are using to program python?

what kind of books you recommend for new comer in this field?

Hello sir, do you remember which Python version did you use in this video? I am having serious trouble with installing "opencv-contrib-python" and importing "cv2". Could you please help me? Also it would be perfect that you make a video about installing python, pycharm, etc. and integrating them.
Thanks in advance!

why you set value 20 in pixel_cm_ratio = aruco_perimeter / 20 ?
based on range between the camera and object?

in <module>
parameters = cv2.aruco.DetectorParameters_create()
AttributeError: module 'cv2' has no attribute 'aruco'

what's wrong?

what are the packages, library, extention, or something that must be download before running the program? cause I've running this this program but isn't working

How can we make this even more accurate ?

You are a fucking genius

thanks alot

how to download object_detector

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Excellent video sir, but i want to know to dump this code for android studio app development

what method or algorithm do u use in this project ?

Anyone pls do help me

With this code can measure area of circles?

instead of aruco marker, can we use any other reference object entity like coin ,metal strip or any other height and width known thing.

Thank you so much. can you suggest how to estimate altitude height, angular velocity, and distance of an any object in space and also shape and dimension debris of an orbit using Aruco marker and OpenCV python taking stereo vision camera image?

Great tutorial!
I want to store the data once I exit the program, how can I do that?

Great Tutorial

Bro,i am working on a project ,where we are going to detect and classify vehicles from cctv footage.i got a problem in classify vehicles can you plz help me...

opencv how to find the object center point and the faethest distance from the center point

Can you please share the github link?

is there an aruco dictionary for circular objects. I want to measure the diameter of an object. So i wanted to utilize the aruco dictionary is it possible

Great Tutorial. I noticed there is a change in the pixel size of the aruco marker after you draw a polygon around the marker (line 21 ) before drawing the drawing the rectangles (line 51). Also played around with the code and noticed that change varies depending on the thickness of the line used to draw the aruco_polygon in line 21 of your script. I think what's happening is the object detection rectangles are now finding contours around the outermost border of the aruco_polygon from line 21. Please advice what is the best way to go about this.