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Question

Which compression protocol is considered a lossless method for bitonal images?

The correct answer is
TIFF-G4

The question asks to identify a lossless compression protocol specifically used for bitonal images.

Identifying Lossless Bitonal Compression

Let's analyze the options:

  • LZW: Lempel-Ziv-Welch (LZW) is a general-purpose lossless data compression algorithm. While it can be used for images, it's not specific to bitonal images.
  • GIF: Graphics Interchange Format (GIF) uses LZW compression. It is lossless for the data it compresses but is primarily designed for indexed-color images with limited palettes, not specifically optimized for bitonal images.
  • TIFF-G4: Modified Huffman error-free run-length encoding, commonly known as TIFF Group 4 (G4), is a specific, highly efficient lossless compression standard designed explicitly for 2D bitonal (black and white) image data. It is widely used for documents and faxes.
  • JPEG: Joint Photographic Experts Group (JPEG) is a lossy compression standard, typically used for continuous-tone photographs, not for lossless compression of bitonal images where sharp edges are crucial.

Conclusion on Compression Protocol

Based on the analysis, TIFF-G4 is the standard and most appropriate answer as it is a well-established lossless compression method tailored specifically for bitonal images.

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Important Questions from Digitization

  1. A digital signature can provide _______ for a message.

    A. Authentication

    B. Clarity

    C. Integrity

    D. Re-transmission

    E. Non-repudiation.

    Choose the most appropriate answer from the options given below:

  2. DEITY has awarded the project entitled "Centre of Excellence for Digital Preservation" to which of the following agencies?

    A. C-DAC, Pune

    B. C-DAC, Bangalore

    C. C-DAC, Noida

    D. C-DAC, Delhi

    E. IIT, Delhi

    Choose the correct answer from the options given below:

  3. Arrange in sequence, the following functional entities of the OASIS Reference Model that occur in the digital information life cycle

    A. Administration

    B. Archival storage

    C. Access

    D. Digital management

    E. Ingest

    Choose the correct answer from the options given below 

  4. ______ is an initiative to preserve the long tail of open access Journals. 

  5. Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

    Assertion (A): Archiving and preserving digital information resources are complex resource-intensive process

    Reason (R): This applies to both i.e born digital and digitized information

    In the light of the above statements, choose the most appropriate answer from the options given below:

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