Introduction to Image Processing

Image Processing is the steps of using image processing tools to covert different kinds of image sources into different file formats

The basic characteristic of an image ：1) File Size2) Image Size3) Resolution4) Image format

File SizeThe image file is saved as different formats. These differences are determined by the file format and the compression rate.

bmp gif jpg tif

36 Kb 13.9 Kb 8 Kb 52.7 Kb

File format

File size

Image Size

Image as seen on the computer are measured by pixel 。 Example 450X400 means there are the height of the file is 4oo pixels and the width is 450 pixels

450 pixels

400pixels

Resolution

Resolution reflects the image quality and it is usually indicated by dpi(dots/inch or pixel/inch)

72 dpi 300 dpi

Image format

Image format can be divided into 2 major categories, “ Bitmap” and “Vector” 。 “ Bitmap” is an image that made up of dots ， and “Vector” image are described by mathematical formulas 。

Can you tell the differences ？Bitmap Vector