377 Ch8
Determines the amount of detail that is displayed
Resolution
Under copyright laws, maps and architectural plans may be registered as pictorial, graphic, and sculptural works. (T/F)
True
Common graphics file formats that most graphics programs and image viewers can open.
standard graphics file formats
Gnome graphics editor
GIMP
You use ____ to create, modify, and save bitmap, vector, and metafile graphics.
Graphic editors
A disk editor tool
Hex Workshop
What kind of graphics file combines bitmap and vector graphics types?
Metafile
Combinations of bitmap and vector Images
Metafile graphics
combination of bitmap and vector images
Metafile graphics
JPEG file format reduces file size with lossy compression. (T/F)
True
Image format derived from the TIFF file format.
XIF
If you can't open an image file in an image viewer, the next step is to examine the file's _________.
header data
The simplest way to access a file header is to use a(n) ____ editor.
hexadecimal
Under copyright laws, computer programs may be registered as ____.
literary works
What kind of graphics file combines bitmap and vector graphics types?
metafile
Steg tools can be used to do the following, EXCEPT __________.
search the suspect's computer for the original file.
The uppercase letter ___ has a hexadecimal value 41.
"A"
Which of the following is not considered to be a non-standard graphics file format?
.dxf
A drawing program that creates vector files
Adobe Illustrator
___ images store graphic info as grids of pixels.
Bitmap
process of coding of data from a larger to a smaller form
Data compression
Most digital cameras use the __________ format in which metadata can be inserted to store digital pictures.
EXIF
All TIF files start at position zero (offset 0 is the first byte of a file) with hexadecimal 49 49 3B. (T/F)
False
All graphics editors can work with both the vector and raster graphics. (T/F)
False
Once a file header is damaged, you cannot repair it. (T/F)
False
Operating systems do not have tools for recovering image files. (T/F)
False
Steganography cannot be used with file formats other than graphics files, such as MPEG and AVI files. (T/F)
False
Steganography performed on photos can be easily detected using any steg tools. (T/F)
False
Stenography cannot be used with file formays other than graphics files, such as MPEG and AVI files. (T/F)
False
Vector files store calculations, not images, so they are generally larger than bitmap files, thereby using more disk space. (T/F)
False
When you decompress data that uses a lossy compression algorithm, you regain data lost by compression. (T/F)
False
You use graphics editors to open and view graphics files but not change their contents. (T/F)
False
You can locate and recover graphics files based on information store in the _________.
File headers
Graphics file format that uses lossy compression
JPEG
________ compression is the method in which no data is lost.
Lossless
A compression method where the removed bits of information reduce image quality
Lossy Compression
The utility that is not a lossless compression utility
Lzip
Short for "picture elements"
Pixels
A file format typically found on higher-end digital cameras; the cameras performs no enhancement processing.
RAW file format
Collection of pixels stored in rows to make images easy to print
Raster image
Steganalysis tools are also called ____.
Steg tools
____ has been used to protect copyrighted material by inserting digital watermarks into a file.
Steganography
____ is a data-hiding technique that uses host files to cover the contents of a secret message.
Steganorgraphy
A vector fie stores only the calculations for drawing lines and shapes; graphic program converts there calculations into an image. (T/F)
True
Copyrights determine the ownership of media, such as images downloaded from a Web site. (T/F)
True
Each graphics file contains a header with instructions for displaying the image. (T/F)
True
Graphics files are binary, and the recent steg tools can perform complex mathematical calculations to verify a file's authenticity by checking file size and palette color. (T/F)
True
Graphics files are created and saved in a graphics editor, such as Microsoft Paint, Adobe Freehand MX, Adobe Photoshop, or Gnome GIMP. (T/F)
True
Graphics files contain digital photographs, line art, three-dimensional images, and scanned replicas of printed pictures. (T/F)
True
Most digital cameras produce digital photos in raw or EXIF format. (T/F)
True
Most graphics file formats, including GIF and JPEG, compress data to save disk space and reduce the file's transmission time. (T/F)
True
Often times, you can find the original file on the suspect's computer, especially in the trash can. (T/F)
True
Present a list of categories covered under copyright laws in the US. (T/F)
True
Steg tools can be used to detect variations of an image. (T/F)
True
The 2 main forms of steganography are insertion and substitution. (T/F)
True
The US Copyright Office Web site defines precisely how copyright laws pertains to graphics. (T/F)
True
The best way to detect hidden data is to compare the altered file with the original file. (T/F)
True
You can detect hidden inserted text in a Web page by comparing what the file displays with what the file contains. (T/F)
True
You can locate and recover graphic files based in information stored in the file headers. (T/F)
True
Most ______ enable you to create and save files in one or more of the standard graphics file formats.
graphic editors
Graphics file format that uses lossless compression
PNG
