Introduction to AdobePhotoshop.
Brief Glossary of Electronic Imaging Terms.
1. Brightness - the intensity of the shades in an image.
2. Contrast - the range of shades in an image.
3. Drawing - an image type that uses large blocks of single colours or gray shades rather than small, individual dots.
4. File format - the software format an image is digitally stored. (Ex: GIF, JPG, TIFF and BMP)
5. File size - the total number of bytes in an image. Size is determined by file format, colour depth, image size, resolution, and editing effects (Ex: sharpening)
6. Halftone - an image type that stimulates gray scales by using various-sized dots, as commonly used in black-and-white newspaper photos.
7. HSB - the hue, saturation, and brightness balance of an image.
8. Hue - the "value" of a colour; or the sum of a colour's saturation and brightness.
9. Image size - the height and width of an image, measured in pixels.
10. Image type - the visual format of a scanned image, not to be confused with the file format. Three main classes of image type are photo, halftone and drawing.
11. Indexed colour table
- the reduction of an image into a grid containing a set number of colours.
- VGA and EGA monitors can read only 16-colour indexed colour tables, whereas SVGA monitors can support up to 256-colour indexed colour tables.
- the most commonly used file format on the WWW that uses an indexed colour table is GIF (256 colours).
- an indexed 256-colour table is also referred to as "8-bit colour".
12. Millions of colours (a.k.a True Colour) - 24-bit colour that allows uo to 16.7 million diffrent colours in an image. Currently, most computer users do not have monitors capable of viewing this colour depth.
13. Optical character recognition (OCR) - software that translates images of words into ASCII characters.
14. Photo or Photograph - an image type with high definition, including many diffrent shades of gray or colour.
15. Resolution - the concentration of dots per inch (dpi) in an image. SVGA monitors are typically 72 dpi.
16. Saturation - the depth or intensity of a colour. Increasing colour saturation makes the colours appear richer, decreasing saturation makes them paler.
17. Sharpness - an image-editing technique that accentuates that relief between shades, decreases blurring, and makes the image appear more defined. Also increases the file siza.
18. TWAIN - the industry standard for exchanging information between graphics applications (such as desktop publishing software) and peripheral devices (such as scanners or other image-capturing devices)
Brief Glossary of Electronic Imaging Terms.
1. Brightness - the intensity of the shades in an image.
2. Contrast - the range of shades in an image.
3. Drawing - an image type that uses large blocks of single colours or gray shades rather than small, individual dots.
4. File format - the software format an image is digitally stored. (Ex: GIF, JPG, TIFF and BMP)
5. File size - the total number of bytes in an image. Size is determined by file format, colour depth, image size, resolution, and editing effects (Ex: sharpening)
6. Halftone - an image type that stimulates gray scales by using various-sized dots, as commonly used in black-and-white newspaper photos.
7. HSB - the hue, saturation, and brightness balance of an image.
8. Hue - the "value" of a colour; or the sum of a colour's saturation and brightness.
9. Image size - the height and width of an image, measured in pixels.
10. Image type - the visual format of a scanned image, not to be confused with the file format. Three main classes of image type are photo, halftone and drawing.
11. Indexed colour table
- the reduction of an image into a grid containing a set number of colours.
- VGA and EGA monitors can read only 16-colour indexed colour tables, whereas SVGA monitors can support up to 256-colour indexed colour tables.
- the most commonly used file format on the WWW that uses an indexed colour table is GIF (256 colours).
- an indexed 256-colour table is also referred to as "8-bit colour".
12. Millions of colours (a.k.a True Colour) - 24-bit colour that allows uo to 16.7 million diffrent colours in an image. Currently, most computer users do not have monitors capable of viewing this colour depth.
13. Optical character recognition (OCR) - software that translates images of words into ASCII characters.
14. Photo or Photograph - an image type with high definition, including many diffrent shades of gray or colour.
15. Resolution - the concentration of dots per inch (dpi) in an image. SVGA monitors are typically 72 dpi.
16. Saturation - the depth or intensity of a colour. Increasing colour saturation makes the colours appear richer, decreasing saturation makes them paler.
17. Sharpness - an image-editing technique that accentuates that relief between shades, decreases blurring, and makes the image appear more defined. Also increases the file siza.
18. TWAIN - the industry standard for exchanging information between graphics applications (such as desktop publishing software) and peripheral devices (such as scanners or other image-capturing devices)
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