Fb Timeline New Style


Photoshop PSD File
RGB color mode
Smart Object
100% Layered

More details

9000 Items


More info

Color depth and color modes
Colour depth, sometimes called bit depth, refers to the
maximum number of colors which can be stored in an im-
.age file. A 1-bit file stores two colors (usually black and white)
and can be described as 1-bit deep since all the information
required to specify each of the dots making up the image can
be stored in a 1-bit number (0 for black or 1 for white). A 2-bit
file stores four colors, 4-bit file stores 16 colours, an 8-bit
file stores 256 colours and 24-bit file stores 16 million colors.design
A greyscale image is an 8-bit file, with 254 shades of
grey plus black and white. The greater the colour depth of an
image, the more space it takes up on disk. A number of applications
now use 32 bits to specify the color of each pixel in
an image. The extra 8 bits are used to describe the transparency
of the pixel in 256 steps from completely transparent to
completely opaque.design
A color mode determines the colour model (see below)
used to display and print compositions. The most commonly
used modes are Greyscale, for displaying black-white
documents, RGB, for displaying color documents on
the screen and for printing slides, transparencies, and RGB
color prints, CMYK, for printing four colour separations and
L*a"b for working with Photo CD images. Other modes are
Bitmap, and Indexed colour. design

Colour mode is specified when a new painting or photo editing process is started, but can be altered midway through the task or when saving or exporting the finished work. If the original image has many colours, and it is converted to a lower colour depth (e.g. 24-bit RGB colour to 256 colours), the file will create a palette of colours and use combinations of these to simulate the original colour of each pixel. The colours in the palette will be derived from the colours in the original image. Indexed colour files are much smaller and easier to manipulate than 24-bit files and can provide a very good colour approximation if the number of colours in the original is limited. Indexed colour images are widely used for multimedia animation applications. Another common reason for changing the mode of an image - from RGB to Greyscale - would be to preview the work before printing to a monochrome printer.