Struct DropBlock 

pub struct DropBlock {
    pub block_size: usize,
    pub drop_prob: f64,
    /* private fields */
}

DropBlock regularization.

Drops contiguous blocks of activations in convolutional feature maps. This is more effective than standard dropout for CNNs because it forces the network to learn more distributed representations.

Fields

block_size: usize

Size of the block to drop (e.g., 7 for 7x7 blocks)

drop_prob: f64

Probability that a block center will be chosen for dropping

Implementations

impl DropBlock

pub fn new(block_size: usize, drop_prob: f64) -> TrainResult<Self>

Create a new DropBlock regularizer.

Arguments

• block_size - Size of the block to drop (must be odd and >= 1)
• drop_prob - Probability of dropping a block (0.0 to 1.0)

Returns

A new DropBlock instance or an error if parameters are invalid.

Example

use tensorlogic_train::DropBlock;

let dropblock = DropBlock::new(7, 0.1).unwrap();

pub fn set_drop_prob(&mut self, drop_prob: f64) -> TrainResult<()>

Set the drop probability (useful for scheduling).

Arguments

• drop_prob - New drop probability (0.0 to 1.0)

pub fn apply( &self, activations: &ArrayView2<'_, f64>, training: bool, rng: &mut StdRng, ) -> TrainResult<Array2<f64>>

Apply DropBlock to activations.

Arguments

• activations - Input activation map (height × width)
• training - Whether in training mode (drops blocks) or inference mode (no dropping)
• rng - Random number generator

Returns

Activation map with blocks dropped (if training) or unchanged (if inference)

Algorithm

1. Sample Bernoulli mask for each position (potential block centers)
2. Expand each selected center to a block of size block_size × block_size
3. Zero out the selected blocks
4. Normalize by keep_prob to maintain expected value

Trait Implementations

impl Clone for DropBlock

fn clone(&self) -> DropBlock

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DropBlock

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.