The Pentium Era - South to North

Zheng Huihong and the second-hand goods first went to the post and telecommunications office, completed the optical cable access procedures, paid the money, and then bought switches, network cables, crystal heads and other consumables. Although Zhang Chen said that money did not matter, Zheng Huihong thought about it. In the morning, they mainly browsed the web, so there was no need for a server. A server cost tens of thousands, which was too expensive, so she didn't buy it.

After moving everything upstairs, Zheng Huihong asked the second person to help them lay out the internal network cables so that they could be used after the optical cable from the post office was pulled in and plugged into the switch.

Zheng Huihong looked at it and decided to install the switch in the fabric warehouse because it was between the design center and Zhang Chen's office. Pulling out the network cable from there, it was the shortest way to the design center, Zhang Chen's office, and the financial center next door. distance.

Zheng Huihong put her backpack on the coffee table and took out a network cable clamp and a network cable tester. Zhang Chen laughed when he saw it. Zheng Huihong, you are a girl, do you have all these things in your bag?

"Yes, aren't you going to use it today? If you don't put this tool in your bag, where can you put it?" Zheng Huihong asked.

"Okay, do you usually do this kind of work?" Zhang Chen asked.

Zheng Huihong nodded: "I do everything. I make web pages, do translations, and when I need to install machines, I do these. If the computer breaks, I fix it. I like to do these things."

"Yes, you and Lao Wan are a couple." Zhang Chen said with a smile.

"What does that have to do with me? It's all steel and concrete."

"He likes to do chores. If you leave Lao Wan to do any chores, he can do them well. To be honest, when he first went to the pole, I didn't get used to it for several days. This is something, it feels like I couldn’t even get anyone to do it, so the first time I asked, I called Lao Wan.”

When Zhang Chen said this, Zheng Huihong laughed.

Zheng Huihong and Erhuo went to the fabric warehouse and freed up the iron shelf on the top floor closest to the corner to store the switch. This is a main switch. When they arrived at the design center, there were many people there, so they would continue there again. Install a secondary switch, as well as the financial center.

The second-hand guy turned out to be a decorator, and drilling holes in the wall and routing cables was a piece of cake for him. The two of them worked until about three o'clock in the afternoon and laid out all the cables.

At that time, there were not many units that applied to install dedicated lines, mainly universities, banks, stock exchanges and a few Internet cafes, so Zheng Huihong applied in the morning, and construction workers from the Post and Telecommunications Bureau came at about 1 p.m., and Huancheng North Road was not open yet. The optical cable is now connected to Stadium Road. They need to pull the optical cable from Stadium Road over the rooftops of the entire dynamic zone. The amount of work is not small.

After Zheng Huihong and the second guy had laid out the wires inside and pulled the optical cable from the post and telecommunications office, they inserted the crystal head of the optical cable into the switch. Zheng Huihong turned on the power of the switch and asked Zhang Chen to test the network speed.

Zhang Chen entered the website address of Chen Yifei's Yifei Clothing Company in the address bar of the browser, clicked on it, and the webpage opened quickly.

"Great!" Zhang Chen exclaimed, "I have tried several times to open this website, but I can't open it. This page can only be opened halfway through, and then it can no longer be opened."

Zheng Huihong looked at it and said with a smile: "That's because they have no experience in making websites. The pixels of this picture are too big."

"What is a pixel?" Zhang Chen asked.

Zheng Huihong was stunned for a moment and said curiously: "Mr. Zhang, as a designer, you don't even know what pixels are?"

"I know lines and colors, but what do I need to know about pixels?" Zhang Chen, in turn, was also surprised.

"Then what designs do you usually use?"

"Paper, pen."

Zheng Huihong nodded, understood. It was still the same. Zheng Huihong asked: "You didn't use design software, you designed on the computer?"

"If you're not used to it, it's fine for drawing children's pictures, but the design isn't working."

Zheng Huihong minimized the web page and looked at the desktop of Zhang Chen's computer. There was no drawing software. Zheng Huihong understood that he was talking about drawing using the drawing software in Windows. She reopened the web page and pointed at the picture above. ask:

"Mr. Zhang, do you think this picture is beautiful?"

"Beautiful." Zhang Chen nodded and said, "This picture doesn't seem to be drawn by hand, but rather printed."

"This was designed on the computer."

Zhang Chen was startled and shouted: "What are you talking about, Zheng Huihong, this was designed on the computer? How did they do it?"

"It's not difficult. Once you learn it, you can draw it. This is designed using special design and drawing software."

Zheng Huihong stood up as she spoke, walked to the coffee table, took out a thick album like a photo album from her backpack, walked back, and opened it. It turned out that there were discs inside. Zheng Huihong picked them up, and Zhang Chen said:

"Mr. Zhang, can I help you install professional drawing software?"

"Very good."

Zheng Huihong took out a CD and said to Zhang Chen: "This is Adobe's Illustrator. If the picture you saw earlier was made with this software, the file would be much smaller and faster to open. This is for Making vector graphics.”

"What is a vector image?" Zhang Chen asked.

Zheng Huihong smiled and said: "Okay, Mr. Zhang, I will let it be installed first. It will take a while to install, and then I will talk to you, okay?"

Zhang Chen said yes.

Zheng Huihong inserted the CD into the optical drive. Zhang Chen saw that a picture of Venus from "The Birth of Venus" painted by Italian painter Botticelli appeared on the computer screen. Zhang Chen thought to himself, it is really an image. Painting As soon as people look at this avatar, they will know that this is drawing software.

The software started to be installed, and the computer host made a whining sound. Zheng Huihong turned around and said to Zhang Chen:

"Mr. Zhang, let me answer what you said earlier, what is a pixel?"

Zhang Chen said yes.

"Mr. Zhang, don't you know about printing?" Zheng Huihong asked.

Zhang Chen often goes to Qu Tianlin's printing factory. He is familiar with the entire process from plate making to printing and binding. Zhang Chen nodded and said, I know a little about this.

"Is the printed pattern composed of dots of different colors? A dot is a pixel." Zheng Huihong said.

"I understand, it's just a stroke when I draw."

"Yes, that's it. However, Mr. Zhang, your strokes may be big or small. But on this computer, every pixel in the same painting is the same. Different paintings will have differences. The higher the pixels, the better the picture. The finer and more exquisite it is, the lower the pixels, the rougher the picture. The height of pixels refers to the number of color dots in the same square centimeter. The higher the color dots, the smaller they are."

"I understand, just like printing, the finer the painting, the higher the mesh number of the screen, and the smaller the ink dots that bleed through."

"Yes, that's right, but in the computer, it is not a color, but a sequence of numbers. A pixel is a sequence of numbers. To open a painting, the computer reads out the sequence of numbers."

"I understand." Zhang Chen said, "So for images with high pixels, it will take a long time for the computer to read them, and it will be slow to open them."

"Yes, Mr. Zhang, if you know what pixels are, it will be easy to talk about what vector graphics are. The paintings we see on computers come in two forms. One is called bitmap, which is also called pixel map and bitmap. , which is composed of pixels.

"When another software is installed, you will see that after the pixel image is enlarged, it is a mosaic. Each mosaic square is a pixel. The pixel image is a picture in reality, such as a photo taken by a camera. Mr. Zhang The picture you drew.

"But you can't draw vector graphics except on a computer with the help of drawing software. Vector graphics have no concept of pixels. It is also called object-oriented drawing. It is a mathematical description of curves and color blocks surrounded by curves. When graphics are made, they are represented internally by the computer as a series of values ​​rather than pixels, and these values ​​determine how the graphics appear on the screen.

"Mr. Zhang, I say this, do you understand?"

Zhang Chen shook his head and said with a smile: "I am even more confused. I can easily imagine the pixels you are talking about. I can also imagine pictures made up of pixels. They are almost the same as my own drawings. The vector pictures you are talking about are not pixels. If it has nothing to do with pixels, I can’t understand it.”

Zheng Huihong thought for a while and said, "Okay, my mouth is too stupid."

"No, no, it's because I know too little about computers and don't know how it works." Zhang Chen said quickly.

Zheng Huihong said: "Let me put it another way. For example, if you are a composer and you write a piece of music, and you want to hand it over to a record company, are there two ways? One is to ask a group of people to play together. Then you record it on a tape using a tape recorder, or another way is to write it as a musical score.

"What is the difference between these two methods? The biggest difference between them is that the recording method is different? The recording on the tape is descriptive and contains all the audio information of the music. All the information in it has been recorded, such as Depending on the playing speed, instrument, timbre, etc., if you want to replace the flute inside with a panpipe, you have no choice but to record it again.

"But if you record it in music scores, it is not descriptive, but descriptive. It does not contain audio information, but only contains a description of the music's melody. If you want to change the playing speed or the timbre of the instrument, you only need to record it in the music score. Just make some changes. If you want to replace the flute with a panpipe, you only need to make some changes in the music score.

“Numerical images, pixel images, and dot matrix images are descriptive, with points as recording objects. Vector images are descriptive, with line segments and calculation formulas as recording objects.

"For example, if we draw a straight line, if it is a pixel image, should we start from the front point, which is the pixel, and go to the last point, and arrange it like this? There must be no missing pixel in the middle. If one is missing, the line will It broke.

"Then using vector graphics software, if you draw this straight line, how will the computer record it? It is very simple. It will remember three pieces of information: the starting point coordinates of the straight line, the end point coordinates, and the color of the straight line. When restoring, the computer will use this Three pieces of information are used to generate an image, just like a band playing a musical score."

Zhang Chen smiled and said, "I finally understand. I understand your last words."

Zheng Huihong stuck out her tongue: "I'm almost exhausted."

Zhang Chen smiled and said, "Then what's the difference between the two?"

"The files of vector images are small and open quickly on the computer, so generally when vector images can be used, vector images are used. The picture of the clothing company in front is slow to open because it uses bitmaps. If it is changed to vector images, There will be no need to open it halfway and get stuck there.

“The disadvantage of pixel images is that because they are composed of individual pixels, when enlarged, they become mosaics one by one, which will produce jagged edges.

"Vector images can only be generated by software. It is a mathematical algorithm. Enlarging or reducing the image does not affect the quality of the image. The image will not be distorted. To put it bluntly, no matter how much you enlarge it, there will be no mosaic or aliasing."

"Since vector graphics are so good, why do we need bitmaps?" Zhang Chen asked.

"Vector graphics also have shortcomings. The biggest drawback is that it is difficult to express realistic image effects with rich color levels." Zheng Huihong said, "I currently install Adobe's Illustrator, which is a vector graphics software and is more suitable for original creations. , such as what you want to draw yourself.

"I'll install one for you later. It's Adobe's Photoshop. It's a typical pixel drawing software. It has strong post-processing capabilities. Its main strength lies in image processing. If you scan a picture or photo into your computer, When it comes to making changes, Photoshop is more convenient.”

After saying so many words, Zheng Huihong's voice became hoarse. Moreover, Zhang Chen discovered that Zheng Huihong's eloquence had improved significantly after she went to Beijing. Was she influenced by Teacher Ma?

Thank you, Tin Soldier, for reading the book every day and ranking third from top to bottom for the reward! Thank you for your monthly votes from Chong Bu Fei, Huo Hu Tribe, Yuan Xi, and Mu Ren! Thanks for all the votes and reading! I wish you all good health!