OpenCV Interview Questions and Answers

Ques 16. What are computer vision libraries?

OpenCV – Python, Java

Ques 17. What are machine learning algorithms available in OpenCV?

Normal Bayes ClassifierK-Nearest NeighborsSupport Vector MachinesDecision TreesBoostingGradient Boosted TreesRandom TreesExtremely randomized trees

Ques 18. How many types of image filters in OpenCV?

• Averaging 
• Gaussian Filtering 
• Median Filtering 
• Bilateral Filtering

Ques 19. How many types of video filters are in OpenCV?

Color ConversionThresholdingSmoothingMorphology Gradients CannyEdgeDetectionContoursHistograms

Ques 20. How can we Increase the Quality of an Image in OpenCV?

Image enhancement process is purely dependent on the application where we need to use the enhanced image and the type of degradation in the image. Few solutions from my basic knowledge

– If image contain so much noises, apply filtering operations such as mean/median etc.

– If the image is looking too dark or too bright apply histogram equalization process to improve the contrast.

– If the image is blurred apply sharpening operations in the image.