Image Dimensions:

Image Dimensions:
The dimension image is defined as the width and height of that image. I.e. number of horizontal pixels (width) and the number of vertical pixels (height).
Example:

If an image has the dimension 1200x1600 means its width is 1200 pixels and the height is 1600 pixels. The dimension 80x60 and 200x150 are given below as the sample images.

80x60

200x150

Higher the image dimensions higher the image size. The image dimension is available at Right Click Image -> Properties ->Advanced -> summery.

Image Resolution: Dots per Inch (DPI)
It is defined as the number of pixels per inch. Pixels are also called as dots. Dots per inch represent how many dots or pixels available in an inch. It varies image to image and hardware to hardware which displays the image.
DPI for CRT Monitors and LCD Displays:
The commercial CRT monitors and LCD displays have 96 Dots per inch. To get the DPI values for normal CRT monitors Right Click in Desktop -> Properties -> Settings tab-> Advanced. The following image shows an CRT monitor DPI as 96 as normal size.

DPI for Printers :
The printers DPI varies from 200 to 300 depends on the printers. Normally the DPI value for printers would be 300. If we need the output image size is 3x4 inch then the image dimension would be 900x1200 for 300 DPI printer.
 
 

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Image Bit Depth or Color Depth of an Image.

Image Bit Depth or Color Depth of an Image.

The number of bits required to store each pixel’s color information. It depends on the image formats and the numbers of colors the images have. It ultimately shows the number of unique colors available in the image. Higher the bit depths have the high image quality i.e. higher the bit depth or color depth the number unique color is high.

For example.

If the Color depth of an image is 8 means it has 256 unique colors.

       Color depth = 8;

      Number of unique colors = 2^8 = 256

Depends on the number of colors bit depth can be classified as the following

•  1 bit images
•   2 bit images
•   3 bit images
•   4 bit images
•   5 bit images
•   6 bit images
•   7 bit images
•   8 bit images
•   24 bit images
•   32 images
•   48 images

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