OpenCV and YOLO Quiz

What does Haar Cascade use to detect features?

• Fourier Transforms

• Integral Images

• CNN Layers

• Wavelets

What is the full form of ROI in image processing?

• Range of Image

• Resolution of Image

• Region of Interest

• Rate of Intensity

What function is used in OpenCV to detect objects using a Haar classifier?

• detectObjects()

• detectAll()

• detectMultiScale()

• detectCascade()

Haar Cascades are best suited for:

• Detecting cars in satellite images

• Real-time face and eye detection

• Speech recognition

• Audio classification

Which OpenCV function draws a rectangle (bounding box)?

• cv2.box()

• cv2.rectangle()

• cv2.draw()

• cv2.bbox()

The scaleFactor parameter in detectMultiScale() controls:

• Image color

• Frame rate

• Detection accuracy

• Image pyramid scaling

Which of the following files is used for face detection?

• haarcascade_car.xml

• haarcascade_frontalface_default.xml

• haarcascade_mouth.xml

• haarcascade_body.xml

What color format does Haar cascade require?

• RGB

• CMYK

• BGR

• Grayscale

In face detection, eyes are usually detected:

• In the whole image

• After converting to HSV

• Inside the face ROI

• Using YOLO only

Haar features are:

• Rectangular wavelet features

• Circular filters

• Edge detectors using neural networks

• Convolutional kernels