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text-recognition-0012

Use Case and High-Level Description

This is a network for text recognition scenario. It consists of VGG16-like backbone and bidirectional LSTM encoder-decoder. The network is able to recognize case-insensitive alphanumeric text (36 unique symbols).

Example

-> openvino

Specification

Metric Value
Accuracy on the alphanumeric subset of ICDAR13 0.8818
Text location requirements Tight aligned crop
GFlops 1.485
MParams 5.568
Source framework TensorFlow*

Inputs

Image, name: Placeholder, shape: 1, 32, 120, 1 in the format B, H, W, C, where:

  • B - batch size
  • H - image height
  • W - image width
  • C - number of channels

Note that the source image should be tight aligned crop with detected text converted to grayscale.

Outputs

The net output is a blob with the shape 30, 1, 37 in the format W, B, L, where:

  • W - output sequence length
  • B - batch size
  • L - confidence distribution across alphanumeric symbols: 0123456789abcdefghijklmnopqrstuvwxyz#, where # - special blank character for CTC decoding algorithm.

The network output can be decoded by CTC Greedy Decoder or CTC Beam Search decoder.

Demo usage

The model can be used in the following demos provided by the Open Model Zoo to show its capabilities:

Legal Information

[*] Other names and brands may be claimed as the property of others.