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histogram of oriented gradients

Innocent Iguana answered on May 25, 2023 Popularity 9/10 Helpfulness 1/10

answer histogram of oriented gradients

histogram of oriented gradients

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- Divides image into localized regions
- Generates histogram for each localized region
- Histograms are created using gradients and orientation of pixel intensities
- In this way, different shape accounts for different histogram
- How it works:
    1. Convert image to grayscale
    2. calculate magnitude and angle of gradients (you may use sobel)
    3. Divide images into grid-cells
    4. For each cell, calculate the histogram of gradient direction
    5. Block-normalize cells to reduce imabalanced highlights / shadows 
    6. Use this combination as feature vector

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Source: Grepper

Tags: histogram-of-oriented-gradients whatever

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