DIGITAL IMAGING DEFINITIONS Assignment 2



DIGITAL IMAGING DEFINITIONS Assignment 2

2.8 – Practice a variety of professional applications of photography

For this assignment you are to use the internet to find definitions for the following terms. Put the definitions in your own words to help you remember them. When you complete the definitions save your work to the X drive as your name.

1. bit

|A bit (a contraction of binary digit) is the basic unit of information in computing and telecommunications; it is the amount of |

|information stored by a digital device or other physical system that exists in one of two possible distinct states. |

2. byte

|The byte is a unit of digital information in computing and telecommunications that most commonly consists of eight bits. |

3. kilobyte (include the abbreviation)

|The kilobyte (symbol: kB) is a multiple of the unit byte for digital information. |

4. megabyte (include the abbreviation)

|The megabyte is a multiple of the unit byte for digital information storage or transmission with three different values depending |

|on context: 1048576 bytes (220) generally for computer memory; and one million bytes (106, see prefix mega-) generally for computer|

|storage.[ |

5. gigabyte (include the abbreviation)

|The gigabyte is a multiple of the unit byte for digital information storage. The prefix giga means 109 in the International System |

|of Units (SI), therefore 1 gigabyte is 1000000000bytes. The unit symbol for the gigabyte is GB or Gbyte, but not Gb (lower case b) |

|which is typically used for the gigabit. |

6. dpi

|DPI (dots per inch) is a measurement of printer resolution, though it is commonly applied, somewhat inappropriately, to monitors, |

|scanners and even digital cameras. |

7. resolution

|Definition: Resolution is the term used to describe the number of dots, or pixels, used to display an image. Higher resolutions |

|mean that more pixels are used to create the image, resulting in a crisper, cleaner image. |

8. RGB

|Definition: A common color mode, RGB stands for the colors of Red, Green, Blue. Add red, green, and blue light to create white |

|light. Because you ADD the colors together to get White, we call these RGB colors the additive primaries. Colors on screen are |

|displayed by mixing varying amounts of red, green, and blue light. |

9. CMYK

|The CMYK color model (process color, four color) is a subtractive color model, used in color printing, and is also used to describe|

|the printing process itself. CMYK refers to the four inks used in some color printing: cyan, magenta, yellow, and key (black). |

|Though it varies by print house, press operator, press manufacturer and press run, ink is typically applied in the order of the |

|abbreviation. |

10. gray scale

|In photography and computing, a grayscale or greyscale digital image is an image in which the value of each pixel is a single |

|sample, that is, it carries only intensity information. Images of this sort, also known as black-and-white, are composed |

|exclusively of shades of gray, varying from black at the weakest intensity to white at the strongest. |

11. gif

|Definition: GIF, short for Graphics Interchange Format is a file format for storing graphical images up to 256 colors. It uses LZW |

|compression which is a lossless compression method. Until the year 2004, this was covered by a patent owned by Unisys and the |

|reason why the PNG file graphic format was invented. |

12. jpg

|Definition: JPG is the file extension, but it is properly referred to as JPEG, short for Joint Photographics Experts Group- this is|

|the committee that created the JPEG standard. Unlike the GIF format, which uses a lossless compression method, the JPEG format is |

|lossy according to a quality value which ranges from 100 which is the highest quality but alos the largest file size down to 1 |

|which is very poor quality but very small files. |

13. tiff

|short for Tagged Image File Format, is a type of formatting used to store digital photo files. TIFF uses only a slight compression |

|to reduce the file size. |

14. bmp

|Short for "Bitmap." It can be pronounced as "bump," "B-M-P," or simply a "bitmap image." The BMP format is a commonly used raster |

|graphic format for saving image files. It was introduced on the Windows platform, but is now recognized by many programs on both |

|Macs and PCs. |

15. graphics format

|There is a wide variety of graphics formats in use today. The following list contains most of them. The formats are in order by |

|extension name under bitmapped or vector category. Some formats appear in both categories because they can hold both raster and |

|vector images. See graphics conversion and extension. |

|BITMAPPED FORMATS (RASTER GRAPHICS) |

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|VECTOR GRAPHICS FORMATS |

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-try the following web sites or what we’ve already read to assist you with some of the definitions:

encyclopedia



Rubric:

Rubric: Name(s):______Adriano Lima_________ _____________________

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|Check-in Date: |

|Comments: |

|Final Evaluation Descriptive Feedback: |

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