Computer Vision
计算机视觉作业代做 When switching to a small dictionary, The performance changes for the worse. The average precision rate is downgrade to
When switching to a small dictionary, The performance changes for the worse. The average precision rate is downgrade to (0.5+0.5+0.4+0.8+0.6)/5= 56%. After visualizing the histogram of both the true match and false match of a specific sample (in the ”dog” category), I found that smaller KMeans centre brings unstable features. 计算机视觉作业代做
Top-left: Histogram20; Top-middle: Histogram20 of the false match; Top-right: Histogram20 of the true match 计算机视觉作业代做
Bottom-left: Histogram100; Bottom-middle: Histogram100 of the false match; Bottom-right: Histogram100 of the true match
As we can see in the above picture, the feature of the specific sample is more similar to the false match using the 20 words. However, feature described with 500 words is more stable thus leads a correct match. 计算机视觉作业代做
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