Mastering Computer Vision with TensorFlow 2.x

Image smoothing

In image smoothing, the high-frequency noise from an image is removed by applying low-pass filters, such as the following:

• A mean filter
• A median filter
• A Gaussian filter

This blurs the image and is performed by applying a pixel whose end values do not change sign and do not differ in value appreciably.

Image filtering is typically done by sliding a box filter over an image. A box filter is represented by an kernel divided by (n*m), where n is the number of rows and m is the number of columns. For a 3 x 3 kernel this looks as follows:

Let's say this kernel is applied to the RGB image described previously. For reference, ...