# ConvolutionTransformation transformation¶

ngraph::pass::low_precision::ConvolutionTransformation class represents the `Convolution`

operation transformation.

The transformation propagates dequantization operations on activations and weights through the `Convolution`

operation. The transformation supports several weights quantization approaches:

quantized weights in low precision with dequantization operations,

weights in original precision with

`FakeQuantize`

operation.

Result dequantization `Multiply`

constant value *result* is calculated as multiplication for dequantization `Multiply`

constant value on activations *a* and dequantization `Multiply`

constant value on weights *b* :

## Limitations¶

Dequantization on activations must be per-tensor. It means that dequantization

`Multiply`

constant value on activations must be scalar.

## Subgraph before transformation¶

### Quantized weights in low precision with dequantization operations¶

The subgraph with quantized `Convolution`

before transformation with quantized weights in low precision constant and dequantization operations:

### Weights in original precision with FakeQuantize operation¶

The subgraph with quantized `Convolution`

before transformation with weights in original precision and `FakeQuantize`

operation:

## Subgraph after transformation¶

The subgraph with `Convolution`

operation after the transformation: