Sunday, September 26, 2010

Vector graphics on the description of several concepts


FONT class = unnamed1 size =- 1> What are vector images?
Vector images, also known as object-oriented images or graphics images, a series of mathematically defined by a line connecting the points. Graphic elements vector file as an object. Each object is a self-contained entity, it has the color, shape, contour, size and screen position and other attributes. Since every object is a self-contained entity, it can maintain its original clarity and curvature, while many mobile and change its properties, without affecting the Legend of the other objects. These features make the vector-based program suitable for the legend and three-dimensional modeling, because they are usually required to create and manipulate a single object. Vector-based graphics has nothing to do with the resolution. This means that they can be the highest resolution display to the output device.
What are bitmap images?
And above compared to vector-based drawing program like Photoshop photo editing program that is used for processing the bitmap image. When you deal with a bitmap image, small details can be optimized to carry out significant changes, and enhancement. Bitmap images, also known as dot matrix image or draw images, is called pixels (picture elements) composed of a single point. These points can be arranged in different patterns and coloring to form. When the enlarged bitmap, you can see the whole image which constitutes the numerous single box. Expand the size of the effect of the bitmap more individual pixels, lines and shapes seem so uneven. However, if a little far from the location of watching it, bitmap image of the color and shape it seems is continuous. Since each pixel is individually dyed, you can order each time the frequency of operation of a pixel generated selected area near photo-realistic effects, such as the deepening shadows and add color. Will also reduce the size of original image bitmap distortion, because it is by reducing the pixels to make the entire image is small. Similarly, the bitmap image is a collection of pixels arranged in the form of created, it can not operate independently (eg, mobile) Office location map.
Why focus on when dealing with bitmap consider the resolution?
Handling bitmaps, the output quality of the image depends on the processing level of the beginning of the resolution settings. Resolution is a general term that refers to an image file contains the details and information, size, and input, output, or display device to generate the level of detail. Operation bitmap, the resolution will affect the quality of the final output will also affect the size of the file. Handling bitmaps need to think twice, because the choice of the resolution to image the entire process is usually accompanied by the document. Whether in a 300 dpi printer or a typesetting device a 2570dpi print bitmap file, the file is always to create the image size set by resolution printing, unless the sub printer encyclical real ideological choice between Tuo Yuan province H Farm Direct Quan 顛?M 顜?Kangzhangsuzhui female swan spring Tuiliaohuangxian Yunjingnanghuang 願?顑?knock plexus lie 顎?care ridge Bru skull Egypt 顑?weighbridges 顎?private Zhuanjiasongmu straight tube feces Yuan Huang 顑?Pufuzhiyuan hand 顔?Lai Yun Huang Tomb thereupon lazy O Karma off season rates cylinder Qin Huai NIE palpitations straw yo? br> about objects in CorelDRAW
CorelDRAW The object can be any basic drawing element or a line of text, such as line, ellipse, polygon, rectangle, mark the word line or line art, etc.. After you finish creating a simple object, you can define its characteristics, such as fill color, outline color, curve smoothness, etc., and special effects of its application. In this information, including the location of the object in the screen, create it in the order, and define the attribute values are described as part of the object. This means that when the operation object (such as moving objects), CorelDRAW will rebuild its shape and all the attributes.
Object can have a closed path or an open path. A group object is composed of one or more objects. When using the selection tool to select an object, you can select the frame around it to identify it. Elected in an object, select the box corner and the midpoint of the filling box will appear 8. Each individual object has its own selection box. When using the "group" command to two or more objects are combined, it will create a group, may take it as an object to select and operate. Objects from the path of composition, these paths form the contours and boundaries of its. A path constituted by a single or a few segments. Endpoint of each segment has a hollow box, called the node. Can use the shape tool to select an object node, thus changing its overall shape and bending angle.
Open path and closed path object object What is the difference?
Open path object is the intersection of the two endpoints. Closed path object is to constitute the two ends of a row that the path of the object. Open path object can be a straight line may be curved, for example, hand-painted tools to create lines, use the Bezier tool to create lines or thread tool to create the thread lines. However, with the "Hand Tools" or "Bezier curve tool" when to start and finish together can create a closed path. Closed path objects, including round, square, grid, natural document line, polygon and star and so on. Closed path object is filled, and open path to the object can not be filled.





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Tuesday, September 14, 2010

In the first half of the 12 most dangerous "killer"


July 14, well-known information security company Rising company released "Mainland China reported outbreaks of computer viruses in the first half of 2003", the report shows the first half of the domestic computer virus disaster presents new features and development trend, "Red terminator "sequential ranking in 12 new and old viruses are currently the main threat to computer users.

The most extensive damage during the first half of 2003 the 12 viruses of the following:

1. Red terminator (Script.RedLof)
2. Love the back door (Worm.LovGate)
3.FUNLOVE (PE_FunLove)
4. Unknown email viruses
5. Nimda (Worm.Nimda)
6. Cover letter (Worm.Klez)
7.CIH (Win32.Cih)
8, WYX (Wyx)
9. Laura (Win32.Xorala)
10. Hard drive killer (Worm.OpaSoft)
11. Trash (Worm.Lentin)
12. Great Promise (Worm.SoBig)
(Note: related, viruses that file to "Rising virus database" search)

Report this epidemic is through the Rising global virus monitoring network (domestic part), the National Anti-Virus Service Network and Rising online antivirus and other departments submitted joint monitoring statistics. From this report, the first half of the domestic computer virus disaster presents the following six characteristics.

A new virus emerging, the extent damage growing

According to statistics, 82% of computer viruses disaster nearly two years by the emergence of new viruses and their variants and are therefore to remind users to buy anti-virus products must pay attention to the product of the new virus update capability, and in the course of in the anti-virus software must be time to upgrade. At the same time as the popularity of the network, the virus spread rapidly increase the speed and breadth, RISING "online antivirus" User feedback shows that average user experience first half of the amount of virus was 2.11.

Second, 12 major virus group caused more than 50% of virus disasters

"Red terminator" and the top 12 viruses and their variants is the most destructive virus, according to statistics of all disasters in the first half, nearly 53% from these "major killer" due. Be noted that most of these viruses showed "varying population" posture, which caused the disaster in the first half of this year, most of them are new variants of these viruses cause, even for the CIH and FUNLOVE this is an old virus, The new variety is endless, so should not these "old Killer" lightly.




[Next]

Third, the worm into the mainstream

Since 2002, through the mail system and network vulnerabilities to spread the worm virus began to become the new Pang, number far exceeds the mainstream of the system once the virus, and this year has been more development, not for not folding Button mainstream virus. Forbes.com said the virus in more than half a worm, its rapid development suggests that Le domestic network construction has accelerated, network security has not Jishi to keep up, network anti-virus will become a network management focus.

4, hybrid virus become a trend

From the first half of the developing trend of the virus, the virus showed characteristics of more and more mixed trend. This category are represented by the Nimda virus, the virus, it is a network vulnerability in the "worm" is an infected file "system the virus." "Great Promise" virus, a member of the family is all set, "worms", "hackers", the "backdoor" virus, and many other features in one, so their ability to greatly enhance the dissemination and destruction.

Fifth, the rapid development of e-mail virus

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