Computer Vision

Question 1

Write down 4 computer vision tasks

Answer 1

Classification, object detection, segmentation, and captioning

Question 2

What is the difference between semantic and instance segmentation?

Answer 2

Semantic segmentation: classifying each pixel in an image into a predefined category.

Instance segmentation: Semantic segmentation + distinguishes between different instances of the same class.

Question 3

Write down the formula for pixel accuracy and mean pixel accuracy

Answer 3

Check notes

Question 4

What is the F1 score?

Answer 4

(2 * Precision * Recall) / (Precision + Recall)

Question 5

What is IoU?

Answer 5

|A ∩ B| / |A ∪ B|

Question 6

What is the difference between one and two stage object detection?

Answer 6

Two stage first finds regions and then classifies, while one stage does it all in one go.

Question 7

How does Contrastive Language–Image Pre-training combine text and images?

Answer 7

It encodes both into a space where labels and images share a high cosine similarity.