Updated config/README.md with weighted and balanced sampler information
@@ -257,7 +257,10 @@ The same amount of padding will be removed when before writing the output volume
###### `window_sampling`
Type of sampler used to generate image windows from each image volume:
- uniform: fixed size uniformly distributed,
+- weighted: fixed size where the likelihood of sampling a voxel is proportional to the cumulative intensity histogram,
+- balanced: fixed size where each label has the same probability of being sampled,
- resize: resize image to the window size.
+For _weighted_ and _balanced_, an image reader named `sampler` is required to generate windows.
###### `queue_length`
Integer specifies window buffer size used when sampling image windows from image volumes.
