Computer Vision Foundations · 免费预览
高斯导数与尺度
对噪声像素作差分会使噪声加倍，因此求导需与高斯模糊结合进行，从而产生一族按尺度索引的导数滤波器。
1. Differentiation amplifies noise
Differentiation amplifies noise
2. Blur and derivative commute
Blur and derivative commute
3. Scale as a parameter of vision
Scale as a parameter of vision
4. The multiscale preview
The multiscale preview
5. Why blur before differencing
Why does convolving with the derivative of a Gaussian behave better than applying a raw difference kernel to a noisy image?
6. Choosing a scale for a task
A program must find the outline of a zebra against grass. Which derivative scale is the better tool and why?
7. Doubling the noise
Two neighboring pixels each carry independent noise of variance 9. Write the variance of the noise in their difference.