Degraded character image generation method and apparatus
AssigneeFujitsu Limited
InventorsSun Jun, Yutaka Katsuyama, Satoshi Naoi
Life of this patent
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Abstract
A method and apparatus for generating a degraded character image at various levels of degradation automatically is presented in this invention. The method comprises rendering the character image on a scene plane; translating and rotating the scene plane according to various parameters; determining a projection region of the character image on an image plane according to various parameters; generating a pixel region mask; and generating a final degraded image by super-sampling. Thus various degraded character images are generated on various conditions of degradation. The generated synthetic characters can be used for performance evaluation and training data augmentation in optical character recognition (OCR).
Claims12
A method for generating a degraded character image at various levels of degradation, comprising:
- rendering a character image on a scene plane;
- translating and rotating the scene plane according to a first set of various parameters;
- determining a projection region of the character image on an image plane according to a second set of various parameters;
- generating a pixel region mask;
- and
- generating a final degraded image by super-sampling.
An apparatus for generating a degraded character image at various levels of degradation, comprising:
- character image rendering means for rendering a character image on a scene plane;
- scene plane manipulating means for translating and rotating the scene plane according to a first set of various parameters;
- projection region determining means for determining a projection region of the character image on an image plane according to a second set of various parameters;
- pixel region mask generating means for generating a pixel region mask;
- and
- degraded image generating means for generating a final degraded image by super-sampling.
Dependencies are inferred from the claim text.