ObjectMarker | Image Annotation Tool for Object Detection | Computer Vision library

 by   takmin C++ Version: Current License: No License

kandi X-RAY | ObjectMarker Summary

kandi X-RAY | ObjectMarker Summary

ObjectMarker is a C++ library typically used in Artificial Intelligence, Computer Vision, OpenCV applications. ObjectMarker has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Image Annotation Tool for Object Detection and Tracking written with OpenCV
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            kandi-support Support

              ObjectMarker has a low active ecosystem.
              It has 22 star(s) with 11 fork(s). There are 4 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              ObjectMarker has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of ObjectMarker is current.

            kandi-Quality Quality

              ObjectMarker has no bugs reported.

            kandi-Security Security

              ObjectMarker has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              ObjectMarker does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              OutlinedDot
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              ObjectMarker releases are not available. You will need to build from source code and install.

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            ObjectMarker Key Features

            No Key Features are available at this moment for ObjectMarker.

            ObjectMarker Examples and Code Snippets

            No Code Snippets are available at this moment for ObjectMarker.

            Community Discussions

            QUESTION

            Latitude and Longitude to Vector3 Not Aligning on 3D Sphere
            Asked 2020-Jan-14 at 23:30

            I am trying to convert latitude and longitude to a Vector3 format. For a given latitude and longitude, I want to convert it into a Vector3, where a marker object will be positioned at this Vector3 location.

            Here is my code:

            ...

            ANSWER

            Answered 2020-Jan-14 at 23:30

            You are using the wrong axes for your conversion to 3d space.

            • Y is the up/down axis, so that should definitely be the one that is sin(latitude).
            • 0,0 is at z = 1*radiusEarth, so z needs to be the one with cos*cos.
            • 0,90 is at x = -1 * radiusEarth, so x needs to be negative cos*sin.

            Altogether:

            Source https://stackoverflow.com/questions/59706407

            QUESTION

            Difficulties with modelling Latitude and Longitude on Unity3D
            Asked 2019-Oct-17 at 20:22

            I'm having some troubles with modelling the Earth with a sphere and using another sphere as a marker to mark the latitude and longitude position of the Earth sphere.

            I've set the x,y, and z scale to 635.6752 as that is the 1000:1 scale of the Earth's radius in metres. I'm using the latitude and longitude positioning of London.

            Here is the code:

            ...

            ANSWER

            Answered 2019-Oct-17 at 20:22

            Unity's sphere primitive has a base radius of 0.5 units. So to make the sphere's radius radius, you need to set the scale to twice that value:

            Source https://stackoverflow.com/questions/58439666

            QUESTION

            SAPUI5 List Bind Aggregation get Value of the list
            Asked 2018-Sep-19 at 05:41

            I have list and I am using bindaggregation to bind my model data. below is my code.

            Controller

            ...

            ANSWER

            Answered 2018-Sep-19 at 05:41

            So if I understand correctly, you're trying to retrieve the status text of an entry, but what you're actually doing is retrieving the default template of the ObjectListItem.

            If you want the correct value for an entry, you can try this. This returns a filled clone of the default template. You can't clone() an empty template and expect it to have values in it.

            Hope this helps, lampstand.

            Source https://stackoverflow.com/questions/52391414

            QUESTION

            Send a flag instead a letter based in a json
            Asked 2018-Jun-01 at 04:20

            i don't know if i expleined i receive a json from an odata call and i send it to my table but one field have a X or is empty but instead of showing a X i want to show a flag like in ObjectListItem with a ObjectMarker type="Flagged" and just showing the flag

            ...

            ANSWER

            Answered 2018-Jun-01 at 01:04

            You could use expression binding:

            Source https://stackoverflow.com/questions/50630805

            QUESTION

            How to get the 3D position from a 2D with opencv
            Asked 2017-Sep-17 at 12:22

            I'm trying to get the 3D coordinates and orientation of an object from its projection onto an image with a single camera with openCV. I have been reading and the steps to follow are: calibrating the image to get the rotational and translational matrices in addition to the matrix k. I have found many examples with a chessboard --> https://littlecodes.wordpress.com/2013/06/24/calibracion-de-camaras-y-procesamiento-de-imagenes-ii/. But my question is: once these parameters have been obtained, how do I get the position of any other object? I have not found any complete examples, only mathematical explanations that I do not quite understand. Something like this, but using the matrices and being able to get the orientation with some accuracy.

            I already have the segmented image, and I can locate the points of the corners.

            Something like that is what I like to get: Video

            Greetings and thanks.

            ...

            ANSWER

            Answered 2017-Sep-17 at 09:25

            You can use cv2.solvePnPRansac to get the rotational and translational vectors and then use cv2.projectPoints to project the 3d points to the plane. There's a complete tutorial on this that you can find here.

            Source https://stackoverflow.com/questions/46262307

            QUESTION

            OpenCV Cascade Classifier Training
            Asked 2017-Jun-21 at 05:27

            I refer this tutorial and this file to train my own classifier. But I faced a few of question.

            1. I used objectmarker.exe to generate the info.txt. In info.txt, each record has different width and height but both of them keep ratio in rectangular. So, what should I set the value of width and height argument in the 02 haarTraining.bat?

            2. The width and height of negative sample should also follow positive sample?

            Updated 20/06/2017

            For example, I used objectmarker.exe to mark down the following 2 image (The marked area represent as the green rectangle). However, these 2 rectangle width and height are not the same.

            In info.txt:

            ...

            ANSWER

            Answered 2017-Jun-21 at 05:27
            1. so the aspect ratio of your positive marked samples is fixed? Choose the minimum size of objects you still want to detect, but big enough to have all necessary features (so maybe you have to train multiple times and choose the best one - was done in the original face detection paper this way).

            2. negative samples just are not allowed to contain the target objects, the size doesn't matter, each (resized) image (sub-)window in each negative sample will be used as a negative sample.

            For example if you want to detect cats of sample size 28x24 in the image, you can provide a 8000x6000 street view image without any cats in it, which will automatically provide a huge amount of negative samples of size 28x24 to the training.

            Source https://stackoverflow.com/questions/44629690

            QUESTION

            distance estimation opencv base on vector
            Asked 2017-Apr-09 at 04:47

            I'm trying to calculate distance using OpenCV and by simulating 2d vector field.

            short story : I have :

            • camera angle
            • camera position
            • 2 object position

            image : 2d field on x axis

            I have camera setup at certain height and angle. my first scene, object at position (3,0) (in frame:y=0). second scene, at (5,0) (in frame:y=240)

            my question is,

            • before continue, is this method could be used?
            • how do I know where the object would be in frame, given the object at (7,0)? what equation should I use?
            • do I need aware of lens distortion? (currently using video input, later will be using camera) do camera distortion callibration will fix it?

            long story :

            I need to estimate a car distance. I have read http://www.pyimagesearch.com/2015/01/19/find-distance-camera-objectmarker-using-python-opencv/., it using fixed width or height of an object, means if the object changed, result will be changed (am I right?) so I need to have a workaround method.

            Or if you have better method, I will be glad to know it. thank you.

            ...

            ANSWER

            Answered 2017-Apr-09 at 04:47

            Given that you know the camera position and properties, you can find the exact location of the car, if it's looking at a straight road and the cars are not flying:)

            how do I know where the object would be in frame, given the object at (7,0)? what equation should I use?

            • You need to find the intersection of two lines. The first line crossing points p1(0, 1.5) and p2(0,7); second line P1(3,0), P2(f/cos(a), 1.5)

              P2 is the intersection of green line (image plane, or the one with points of (y=?),.. ) and horizon. f is the focal length, a is the angle between fov line and the horizon.

            do I need aware of lens distortion? (currently using video input, later will be using camera) do camera distortion callibration will fix it?

            • You should eliminate the lens distortion. Otherwise only the points on the center of the image can be located precisely.

            The link you gave uses the size of the rectangle and triangle similarity to find the distance. Also it uses a 2D object, which means he can find the affine transformation easily to refine the result. You don't know the size of all cars i guess, you just need to find the position of the closest wheel of the vehicle. Good luck with that :) Ask google for something like real time car detection.

            Shadow of the car also would be a problem, i hope you live in north Europe :)

            Source https://stackoverflow.com/questions/43290282

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

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            Install ObjectMarker

            You can download it from GitHub.

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            https://github.com/takmin/ObjectMarker.git

          • CLI

            gh repo clone takmin/ObjectMarker

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            git@github.com:takmin/ObjectMarker.git

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