A non-transitory processor-readable medium storing code representing instructions to be executed by a processor, the code comprising code to cause the processor to:
- receive a plurality of documents associated with a plurality of templates and a plurality of non-native texts;
- generate a plurality of relevancy masks based on the plurality of documents or the plurality of templates;
- generate a plurality of multichannel field images including the plurality of relevancy masks and at least one of the plurality of documents, the plurality of non-native texts, or the plurality of templates;
- and
- execute an optical character recognition (OCR) model to generate the plurality of non-native texts from the plurality of multichannel field images.