Xueba's Sea of ​​Stars

Chapter 225 University of Pennsylvania

On November 11, Wu Bin boarded a plane to Philadelphia.

In previous years, the National College Physics Competition only required students from all over the world to complete the questions and answers and then send their papers to the official email. But this year, I don’t know whether it was the American Physical Society or the Astronomical Association that got rich, and they actually set the University of Pennsylvania as the competition venue. An invitational tournament was held.

As one of the eight famous Ivy League schools, what Wu Bin knows most about this university is that their research strength is very strong.

In addition, because the first general-purpose electronic computer ENIAC was born here, Penn University is also known as the birthplace of modern computer science civilization.

Sitting on both sides of Wu Bin were his two teammates, one was Zheng Wenhan, a junior senior of the Faculty of Letters, and the other was Bo Jiasheng, a junior senior of the Faculty of Physics.

The two people flying to Philadelphia at this moment can be said to be full of joy, because this time the United States will hold the competition in its home country, so it can't be like in previous years, as long as the registered team can participate.

Otherwise, there are so many universities in the world, and each university has several teams. The number of people in this invitational tournament will explode, and no matter how rich you are, you can't afford it.

So in order to select the participating teams, each country has its own tryouts.

And it was during the selection competition that Zheng Wenhan and Bo Jiasheng really realized how thick the "thigh" they were hugging was.

The topic of this selection competition was "Camera Positioning", and the first question alone confused the two of them.

[On the basis of the pinhole linear model, through the calibration of the internal and external parameters of the digital camera, the coordinate transformation relationship from the target to the target image is determined, and its coordinate transformation model is established. 】

The person in charge of the modeling, Bia Jiasheng, really felt his scalp tingle after watching it. The main problem is too realistic, and knowledge about optical imaging is not enough.

And when Bo Jiasheng was scratching his hair, Wu Bin suddenly leaned in front of the computer and said, "This question is very interesting."

"Master, are you interested?" Bo Jiasheng looked back at Wu Bin and asked affectionately.

"I'm quite interested, but don't worry, I won't steal your fun, I'll wait for you..."

When Bo Jiasheng heard this, he quickly held back his hands and said, "Don't, don't, please, God please steal my fun, I really can't enjoy it..."

Then Bo Jiasheng felt the biggest blow in his life, because after he finished speaking, he read the message "You can't even do such a simple question?" from Wu Bin's surprised eyes. This still made him a little uncomfortable.

However, Wu Bin's series of operations with a sense of teaching in the series of cloud and flow made Bo Jiasheng completely convinced.

From using a 3X4-order matrix to establish the direct correspondence between five points in space and two-dimensional image points, to solving the internal and external parameters of the camera, and then finding the image coordinates of the center of the circle on the target at the image plane of the camera, it is done in one go.

"In the end, we only need to establish a distortion compensation model for the coordinates with relatively large errors, and then correct the errors." Wu Bin said after finishing the calculation, looking at the completely stunned Pia Jiasheng.

"Oh, so it is."

Bo Jiasheng kept nodding his head, looking at Wu Bin with more and more worshipful eyes.

In fact, when forming the team, he once suggested that it is best to find a master in the mathematics department to be in charge of the thesis. After all, he is not very confident in the algorithm. If there are experts in mathematics in the team, they can still discuss it.

But at that time, Director Jiang gave him a sentence, "Your team has everything, don't worry."

Until now, Bo Jiasheng finally understood the deep meaning of Director Jiang's words.

This thigh student is an all-round god!

After successfully establishing the coordinates of the 2-dimensional computer image, Wu Bin pointed to the second question and said to Pi Jiasheng: "You can try the second question, as long as you use the model in the first question to compare the targets and their positions given in the two pictures respectively. image, bring in the known quantity, and calculate the image coordinates of the center of the circle on the target on the image plane.”

"Okay... I'll try."

Can be selected by director Jiang to join the sharp knife team, of course Bo Jiasheng will not be a scumbag who can only shout "666". After Wu Bin solved the first question perfectly and also pointed out the solution to the second question, he For this question, I have transitioned from not seeing my five fingers when stretching out my hands to seeing the sun through the clouds.

……

In the end, Wu Bin's team successfully won the gold medal, and Wu Bin's thesis was unanimously praised by the judges.

Apart from Bo Jiasheng who has completely become Wu Bin's fanboy, Zheng Wenhan did not escape either.

Because the data of this type of question is very large, he is also under great pressure as a programmer.

On the first day, when it was all night until 3 o'clock, Zheng Wenhan was already yawning, and he almost drank Red Bull mixed with coffee.

When Wu Bin saw him, he said to him: "If you feel sleepy, go to bed first. Don't burn out your body."

After hearing this, Zheng Wenhan smiled wryly, pinched the bridge of his nose and said, "It's not that I don't want to go to sleep, it's that there are too many things to do, and I'm afraid I won't be able to make it tomorrow."

"It's okay, I'll help you make up the rest."

At that moment, Zheng Wenhan felt that Wu Bin's figure was so stalwart!

With such thighs, Bo Jiasheng and Zheng Wenhan could wake up laughing when they fell asleep, but they didn't plan to degenerate into teammates enjoying lying down and winning. They asked Wu Bin a lot of questions along the way. Can independently complete the part that should be completed by oneself.

At 8:00 local time in the United States, the flight Wu Bin and the others were on landed steadily, and the group walked out of the airport in high spirits.

All three of them came to the United States for the first time, and they all have a strong interest in this country that stole chickens frantically in World War I and World War II and became the number one in the world.

While waiting for luggage, Wu Bin looked at the two people next to him and asked, "Do you know how to spell Philadelphia's English name?"

"Philadelphia?" Peter Jiasheng quickly replied.

"Well, actually these two are Greek words, philus means city of brothers, and adelphus means love."

Both Jiasheng and Zheng Wenhan, who had learned new knowledge, nodded in understanding at first, but soon frowned, realizing that things were not that simple.

"Brotherly love???" Bo Jiasheng was startled.

"Yes." Wu Bin nodded, "Philadelphia is also called City of Brotherly Love."

"It sounds gay..." Zheng Wenhan couldn't help saying.

"Hush..." Wu Bin immediately made a gesture of silence to him, and took a peek at the two black brothers next to him, only to find that they didn't seem to hear, so he was relieved.

"It's other people's territory, be careful what you say and do." Wu Bin whispered.

"Understood." The two nodded for a while.

From leaving the airport to the University of Pennsylvania, apart from those buildings whose styles are completely different from those in China, the biggest difference is that people can be seen performing, singing, dancing, drawing, and playing on almost every street. Yes, everything, I don't know if this is a unique Philadelphia culture, or it is like this in the United States.

PS: After a while of work, I have a vacation, thank you readers for waiting for updates.

(End of this chapter)