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image watermarking

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  1. Create custom format handler | Documentation

    This article shows how to implement one or several interfaces for the document's features and required redaction....Watermark Product Solution GroupDocs...page images) IImageFormatInstance Required for raster image format...

    docs.groupdocs.com/redaction/java/create-custom...
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  2. Password Protect Excel Files in C# | Lock Unloc...

    Let's learn how to password protect Excel spreadsheet files using C#. Change the existing password or remove it to unlock the XLS/XLSX files using .NET API....discussed adding text and image watermarks to the Excel spreadsheets...Unlock Excel Files Online Watermark Excel Files using C# Protect/Unprotect...

    blog.groupdocs.com/merger/lock-unlock-excel-fil...
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  3. Export annotations and retrieve document pages ...

    post. Tagged with net, annotator, api, Image....while annotating documents or images on .NET platform. Other highlights...view, convert, annotate, watermark, assemble, parse, search,...

    dev.to/groupdocs/export-annotations-and-retriev...
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  4. Password Protect PDF Files in C# | Lock Unlock PDF

    Let's learn how to lock PDF files with password protection using C#. Change the existing password or remove it to unlock the PDF files using .NET API....discussed adding text and image watermarks to the documents to avoid...Protect PDF Files Online Watermark PDF Files using C# How to...

    blog.groupdocs.com/merger/lock-unlock-pdf-files...
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  5. Create custom format handler | Documentation

    This article shows how to implement one or several interfaces for the document's features and required redaction....Watermark Product Solution GroupDocs...PDF with page images) Required for raster image format redactions...

    docs.groupdocs.com/redaction/net/create-custom-...
    more..

  6. Evaluation Limitations and Licensing | Document...

    Note GroupDocs.Metadata also works without the license in trial mode with certain limitations Evaluation version limitations You can easily download GroupDocs.Metadata for evaluation. The evaluation download is the same as the purchased download. The evaluation version simply becomes licensed when you add a few lines of code to apply the license. You will face following limitations while using the API without the license. API Limitations Document properties (Pdf, Word, Excel, PowerPoint, Visio, etc) Only first 5 properties can be read XMP API Only first 2 XMP schemes can be read EXIF API GPS IFD and Image thumbnail are unavailable Only first 5 properties can be read IPTC API Only first 5 properties can be read Id3v2, Lyrics3, APEv2 tags Only first 5 properties can be read QuickTime atoms Only first 5 atoms can be read File open Open maximum 15 files, otherwise, API throws exception File save Not supported in trial mode Licensing The license file contains details such as the product name, number of developers it is licensed to, subscription expiry date and so on....Watermark Product Solution GroupDocs...be read EXIF API GPS IFD and image thumbnail are unavailable Only...

    docs.groupdocs.com/metadata/java/evaluation-lim...
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  7. Implement custom serialization with QR-Code sig...

    This article explains how to implement custom serialization for QR-code electronic signatures....Watermark Product Solution GroupDocs...into metadata signature to Image document. using ( Signature...

    docs.groupdocs.com/signature/net/implement-cust...
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  8. OCR support | Documentation

    This article demonstrates the ability to connect an external module (library) for the recognition of printed text (optical character recognition, OCR) on Images, either separate or embedded in documents...Watermark Product Solution GroupDocs...character recognition, OCR) on images, either separate or embedded...

    docs.groupdocs.com/search/net/ocr-support/
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  9. eSign document with Barcode signature | Documen...

    This article explains how to add Barcode signature on document page with various options like barcode type, barcode text, positioning, alignment and other visual settings with GroupDocs.Signature...Watermark Product Solution GroupDocs...Generally speaking, barcode is an image of a rectangular form that consists...

    docs.groupdocs.com/signature/net/esign-document...
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  10. Cache results | Documentation

    This article contains caching use-cases with GroupDocs.Viewer within your .NET applications....Watermark Product Solution GroupDocs...character 458 The following image shows a sample console output:...

    docs.groupdocs.com/viewer/net/caching-results/
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