What is double layer pdf?

Double-layer PDF means that the first layer is a picture, the second layer is text, the picture and text are aligned up and down. When you see the picture, you can copy it to the clipboard and paste it into other text editing software (e.g. WORD, WPS, etc....) . You can use merge pdf files i love pdf for editing and other operations.

Dual-layer PDF file is a PDF file with a multi-layer structure, which is derived from a PDF file, can also be based on the image (such as scanning generated documents); Dual-layer PDF file is a contains text and images of two levels, and the location of one after another. Dual-layer PDF file is a standard data can be quickly entered into the scanner directly after the retrieval of PDF documents, after the decontamination, correction and OCR recognition, PDF documents are two-layer, the top layer is the original image, the bottom layer is the recognition of the results, and therefore can be 100% preservation of the original layout, and support for the selection/copy/retrieval of functions such as such a PDF document indexing database is easy to set up, can be carried out! scientific management.

Dual-layer PDF files are usually available in two formats. First, through the OCR software to decontaminate the image type, correction and recognition, and then through the production of dual-layer PDF software to directly generate searchable dual-layer PDF documents. Second, the text type, the most common WORD to dual-layer PDF files, the first WORD file into a single-layer PDF file, and then a single-layer PDF file into an image file, and then use OCR software to recognize, and then through the production of dual-layer PDF software to directly generate searchable dual-layer PDF files.

PDF Double-layer PDF

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