CDIA Image Capture & Processing Techniques 4

Question 1

What is the primary advantage of using lossless compression (e.g., CCITT Group 4) for black-and-white document images?

Accepted Answer

Exact pixel-for-pixel reconstruction with no data loss

Answer

CCITT Group 4 (G4) is a lossless compression standard that reconstructs the exact original bitmap, which is critical for text and line-art documents where any distortion could impair readability or OCR.

Question 2

Which scanning artifact appears as a ghost image of the reverse side of a document showing through when scanning thin paper?

Accepted Answer

Bleed-through

Answer

Bleed-through occurs when ink or print from the reverse side of thin paper is partially visible on the scanned image, which can be reduced using background suppression settings.

Question 3

In a document imaging system, what is the role of an image header file?

Accepted Answer

Containing metadata about the image such as resolution, bit depth, color space, and compression type

Answer

Image header files (e.g., TIFF header) store metadata parameters that describe how the image data is structured, enabling software to correctly interpret and display the image.

Question 4

What does 'interpolated resolution' mean in scanner specifications?

Accepted Answer

A resolution value achieved by software upsampling beyond the hardware's optical limit

Answer

Interpolated resolution uses software algorithms to insert additional pixels between those actually captured, artificially increasing the reported DPI beyond the scanner's true optical capability.

Question 5

Which file format is specifically designed for multi-page document imaging and supports multiple compression types within a single file?

Accepted Answer

TIFF

Answer

TIFF (Tagged Image File Format) supports multi-page documents and allows different compression algorithms (G4, LZW, JPEG, uncompressed) to be applied to individual pages within one file.

(CDIA) Certified Document Imaging Architect Practice Test

(CDIA) Certified Document Imaging Architect Practice Test

CDIA Image Capture & Processing Techniques 4