Bitmap: Bitmap, also known as pixel map, consists of a grid of pixels or points. Compared with vector graphics, bitmap images are easier to simulate the real effect of photos. It works just like painting on canvas with a brush. If you enlarge this figure to a certain extent, you will find that it is made up of small squares, which are called pixels. Pixel is the smallest image element in an image. Bitmap images can contain millions of pixels. Therefore, the size and quality of bitmap depends on the number of pixels in the image. Generally speaking, the more pixels per square inch, the smoother the blending between colors and the larger the file. Software based on bitmap includes Photoshop, Painter, etc.
Software based on bitmap processing does not mean that it can only process bitmaps. On the contrary, software based on vector graphics processing cannot only process graphics. For example, CorelDRAW is a vector-based program, but it can not only import (or export) vector graphics, but also use CorelTrace to convert bitmaps into vector graphics, and can also convert graphics created in CorelDRAW into bitmaps for export.
The biggest difference between the software based on vector diagram and the software based on bitmap is that the software based on vector diagram is more original and its main advantage lies in originality, while the processing software based on bitmap has stronger post-processing ability and its main advantage lies in image processing. (After the vector diagram is enlarged, those sawtooth does not exist, but after the bitmap is enlarged, there are sawtooth. )
▲ Bitmap:
Also known as raster image, it is generally used for photo quality image processing, and consists of many "pixel" groups similar to small squares.
Into graphics. Represented by its position and color value, it can show the change of color shadow. Mainly in PHOTOSHOP
Used to process bitmaps.
▲ vector diagram
Vector images, also known as object-oriented images or drawing images, are mathematically defined as a series of connected lines.
The point is. The graphic elements in a vector file are called objects. Each object is an independent entity.
It has properties such as color, shape, outline, size and screen position. Because each object is independent.
The entity of an object can move and change its genus many times, while maintaining its original clarity and curvature.
Sex does not affect other objects in the legend. These characteristics make vector-based programs especially suitable for legends.
And 3D modeling because they usually require the ability to create and manipulate a single object. Draw the same resolution based on vectors.
It has nothing to do with speed. This means that they can be displayed on the output device at the highest resolution.
What is a bitmap image?
Compared with the vector-based drawing program mentioned above, photo editing programs like Photoshop are used for
Process bitmap images. When you work with bitmap images, you can optimize small details, make major changes, and
Enhance the effect. Bitmap images, also known as dot matrix images or drawn images, are composed of pixels (picture elements).
Single point. These dots can be arranged and dyed into different patterns. When the bitmap is enlarged
You can see that countless individual squares make up the whole image. The effect of expanding the bitmap size is to add a single
Pixels, making lines and shapes appear uneven. However, if you look at it from a distance, the bitmap
The color and shape of the image look continuous again. Because each pixel is dyed separately, it can be colored by
By operating the selection area at a frequency of one pixel at a time, a realistic effect similar to a photo is produced, such as darkening the yin.
Shadows and accent colors. Reducing the bitmap size will also distort the original image, because it will make the whole image by reducing pixels.
The image is getting smaller. Similarly, because bitmap images are created in the form of pixel arrays, they do not
You can manipulate (e.g., move) the local bitmap independently.
Why should we focus on resolution when dealing with bitmaps?
When processing bitmaps, the quality of the output image depends on the resolution set at the beginning of the processing. minute
Resolution is a general term, which refers to the size of details and information contained in an image file, as well as the output.
The level of detail that an input, output, or display device can produce. When manipulating bitmaps, the resolution will not only affect the final
The quality of the output will also affect the file size. You need to think twice before you do it. You deal with the bitmap because the image is selected.
Resolutions are usually accompanied by documents throughout the process. Whether it's a 300 dpi printer or
Print bitmap files on a 2570dpi phototypesetting device, and the files always use the resolution set when creating images.
Print unless the resolution of the printer is lower than the resolution of the image. If you want the final output to look like a screen
As the screen shows, before you start working, you need to know the resolution of the image and the resolution of different devices.
The relationship between. Obviously, vector diagrams don't need to be considered so much.
Understanding objects in CorelDRAW
An object in CorelDRAW can be any basic drawing element or text line, such as a line.
, ellipse, polygon, rectangle, logo line or artistic character line, etc. After creating a simple object, you can
Define its characteristics, such as fill color, outline color, curve smoothness, etc. And apply special effects to it.
Fruit. This information includes the position of the object on the screen, the order in which the object was created, and the defined properties.
Value will be used as part of the object description. This means that when manipulating objects, such as moving objects, the core
LDRAW reconstructs its shape and all its attributes.
An object can have a closed path or an open path. Group objects are made up of one or more
Object. When you select an object with the selection tool, you can identify it by the selection box around it.
. When an object is selected, eight filled boxes will appear at the corners and midpoint of the selection box. Every couple
Elephants have their own selection boxes. When two or more objects are combined with the Group command, it will
Generate groups that can be selected and manipulated as objects. An object consists of paths, which
The diameter constitutes its outline and boundary. A path can consist of one or several line segments. Endpoint of each line segment
There is a hollow square called a node. You can change an object by selecting its node with the shape tool.
Its general shape and bending angle.
What is the difference between an open path object and a closed path object?
The two endpoints of an open path object are disjoint. A closed path object is an object that connects two endpoints.
Objects that make up a continuous path. Open path objects can be straight lines or curves, for example, by hand drawing.
Lines created by tools, lines created by Bezier curve tools or thread lines created by thread tools, etc.
However, the start point and the end point can also be connected when using the Hand Tool or the Bezier Curve Tool.
Create a closed path. Closed path objects include circles, squares, grids, natural pen lines, polygons and stars.
Shape and so on. Closed path objects can be filled, while open path objects cannot be filled.