First, the difference between graphics and images
It has different meanings in different contexts. Simply put, computer graphics are computer-generated graphics (like).
One theory: drawing pattern is obtained by a computer, and the image is a man with an external device outside the captured scene
Another argument: is a vector graphics, and images are bitmaps (bitmaps)
Second, the graphic (image) constituting the attribute
From the broad concept, generally divided into non-geometric properties and geometric properties
(1) geometric properties: Characterization object contour shape. Also known as geometric elements. Including points, lines, surfaces, thereof.
(2) non-geometric properties: visual properties, the characterization of the object color and material. Such as light and dark, color, texture, transparency, line type, line width.
From the composition elements divided into two categories:
Third, the definition of a bitmap and vector
The computer can be in bitmap format image (Bitmap) or vector (vector)
1, the bitmap (bitmap)
Also known as a bitmap or pixel bitmap, FIG on the computer screen by pixels on the screen constituted by the binary data at each point to describe its color and brightness information.
2, Vector
Vector, also known as object-oriented graphic or drawing pattern, i.e., a graph is a graph mathematically described enclosed color-produced graphics.
The difference between four of bitmap and vector
1, the difference between the storage
Position information of each pixel of the matrix of FIG file storage, and the color information of gradation information.
Vector file is a mathematical equation, the mathematical description of graphic forms, usually with the shape parameters and parameter attributes of a graph that represents the graphic
Obviously, the bitmap (matrix) file larger than the storage space vector file.
Both can be interchangeable
2, scaling difference
Bitmap (bitmap) is related to the resolution, i.e. comprising a fixed number of pixels on the image of a certain area. Amplifying distortion, enlarged, the more the lower the resolution.
Vector nothing to do with the resolution, it can be scaled to any size and printed at any resolution on the output device, it will not affect the clarity.
3, the difference between storage formats
Bitmap (bitmap) format is stored:
BMP、TIFF、GIF、GPEG、PNG
Currently in the network's most popular image formats mainly JPEG, GIF, PNG format.
Vector storage format:
DXF（Data exchange File）
SVG（Scalable Vector Graphics）
EPS、WMF、EMF
4. Summary
Bitmap realistic imitation easier compared with vector graphics, but larger than the storage space vector
When scaling graphics, vector without distortion, especially for text design, graphic design, plate design, logo design, computer-aided design (CAD), arts and crafts design, illustration and so on.
And vector graphics bitmap image is not good or bad, but for different purposes.