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OpenCV Test

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OpenCV Online Test

OpenCV (Open Source Computer Vision Library) is a type of machine learning software library and was built to provide a common infrastructure for computer vision applications to accelerate the use of machine perception in commercial products. Being an open-source type library, OpenCV has more than 2500 optimized algorithms that  includes a set of both classic and state-of-the-art computer vision and machine learning algorithms. These algorithms can be used to detect and recognize faces,  identify various objects,  classify some human actions in videos,  track camera movements, track moving objects, etc. OpenCV online test helps tech recruiters and hiring managers to assess candidates OpenCV skills. OpenCV skills test is designed by experienced subject matter experts (SMEs) to evaluate and hire computer vision engineer as per the industry standards. OpenCV online test helps to screen  candidates who possess skills as follows:

- Good experience of using OpenCV software library

- Knowledge of using functions like Shape functions in OpenCV   - Knowledge of upper limit and lower limit functions       

- Understanding of background subtractor and diagonal points in the library

- Familiarity with terms like Webcam and biomolecule compunds

OpenCV skills test is a secure and reliable  assessment. You can use our role-based access control feature to restrict system access based on the roles of individual users within the recruiting team. Features like window violation, image, audio/ video proctoring help detect cheating during the test. This test may contain MCQs (Multiple Choice Questions), MAQs (Multiple Answer Questions), Fill in the Blanks, Whiteboard Questions, Audio / Video Questions, LogicBox (AI-based Pseudo-Coding Platform), Coding Simulators, True or False Questions, etc.

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Test Summary

Useful for hiring
  • CV/ML Engineer
  • Image Processing / Software Developer
  • Computer Vision Engineer – OpenCV
  • Artificial Intelligence Engineer – OpenCV
  • Android Developer using OpenCV
Test Duration
No. of Questions
Level of Expertise
Entry level/Mid/Senior
Topics Covered

Background Subtractor

Shape Functions used in OpenCV




Lower Limit and Upper Limit Functions


Biomolecules Compunds


Diagonal Points

Sample Question
Choose from our 100,000+ questions library or add your own questions to make powerful custom tests.
Question type
Multiple Option
Topics covered


The image of an object varies a lot when seen from different perspectives. When developing a model that works well on all images, one has to take care of all possible perspectives. Which of the following would you use to get a perspective look from an image? (pts1 and pts2 are points for the transformation of perspective)


  • matrix = cv2.getPerspectiveTransform(pts1, pts2)<br />result = cv2.warpPerspective(image, matrix, -1)
  • matrix = cv2.getPerspective(pts1, pts2)<br />result = cv2.warpPerspective(image, matrix, -1)
  • matrix = cv2.warpPerspective(pts1, pts2)<br />result = cv2.getPerspective(image, matrix, -1)
  • matrix = cv2.warpPerspective(pts1, pts2)<br />result = cv2.getPerspectiveTransform(image, matrix, -1)
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