Chapter 225 University of Pennsylvania
On November 10, Wu Bin got on 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 its research strength is very strong.
In addition, because the first general-purpose electronic computer ENIAC was born here, Penn 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 in the School of Letters, and the other was Bo Jiasheng, a junior in the School 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 the United States, so it cannot be like in previous years, as long as the registered teams can participate.
Otherwise, there are so many universities around the world, and each university has several teams. The number of people in this invitational tournament would be huge. No matter how much money we have, we can't afford it.
Therefore, in order to select participating teams, each country conducts its own selection competition.
It was during the trials that Zheng Wenhan and Bo Jiasheng truly realized how thick the "thigh" they were holding was.
The title of this trial was "Camera Positioning", and the first question alone confused the two of them.
[Based on 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. 】
Bo Jiasheng, who was in charge of the modeling, really felt his scalp numb after watching it. The main problem was too real, and the knowledge about optical imaging was simply not enough.
And when Bo Jiasheng was scratching his hair, Wu Bin suddenly came to the computer and said: "This question is quite 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 his hand and said, "No, no, no, please, God, please steal this fun from me. I really can't enjoy it..."
Then Bo Jiasheng felt the biggest blow in his life, because after he finished saying this, he read the message "You can't even do such a simple question?" from Wu Bin's surprised eyes, This still made him feel a little uncomfortable.
However, Wu Bin's subsequent series of smooth and teaching operations completely convinced Bo Jiasheng.
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 in the image plane of the camera, it is all in one go.
"In the end, we only need to establish a distortion compensation model for the coordinates with relatively large errors and perform error correction." After Wu Bin finished the calculation, he looked at Bo Jiasheng who was completely stunned and said.
"Oh, that's it."
Bo Jiasheng nodded vigorously, looking at Wu Bin with more and more admiration in his eyes.
In fact, when forming the team, he once suggested that it would be best to find an expert from the Department of Mathematics to take charge of the thesis. After all, he is not very confident in the algorithm area. If there are talented people from the Department of Mathematics in the team, they can still discuss it.
But Director Jiang told him at that time, "Your team is lacking in everything, don't worry."
Until now, Bo Jiasheng finally understood the meaning of Director Jiang's words.
This thigh-high junior is a complete all-around god!
After successfully establishing the 2-dimensional computer image coordinates, Wu Bin pointed to the second question and said to Bo Jiasheng: "Try the second question. Just use the model of the first question and compare the targets and their values given in the two pictures. Image, just 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."
To be chosen by Director Jiang to join this sharp knife team, Bo Jiasheng would certainly not be a scumbag who could only shout "666". When Wu Bin solved the first question perfectly and also gave him guidance on how to solve the second question, he This question has gone from being invisible to being able to see the sun through the clouds.
…
In the end, Wu Bin's team successfully won the gold medal, and Wu Bin's paper received unanimous praise from the judging panel.
In addition to 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.
By the time he stayed up all night until 3 o'clock on the first day, Zheng Wenhan was already yawning all day long and 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 bitterly, pinched the bridge of his nose and said, "It's not that I don't want to go to bed, it's that there are too many things to do, and I'm afraid I won't be able to make it in time tomorrow."
"It's okay, I'll just finish the rest for you."
At that moment, Zheng Wenhan felt that Wu Bin's figure was so majestic!
With such big legs, Bo Jiasheng and Zheng Wenhan can laugh out loud even when they fall asleep. However, they have no intention of becoming teammates who enjoy lying down and winning. They asked Wu Bin a lot of questions along the way, hoping that when they compete in the United States, You can complete your part independently.
At 8:00 local time in the United States, Wu Bin's flight landed steadily, and the group walked out of the airport in high spirits.
It is the first time for all three of them to come to the United States, and they all have a strong interest in this country that stole chickens crazily during World War I and World War II and became the number one country in the world.
While waiting for the luggage, Wu Bin looked at the two people next to him and asked, "Do you know how to spell the English name of Philadelphia?"
"Philadelphia?" Bo Jiasheng answered quickly.
"Well, actually, both of them are Greek words. philus means city of brothers, and adelphus means love."
Bo Jiasheng and Zheng Wenhan, who had learned new knowledge, nodded in understanding at first, but soon frowned and realized that things were not that simple.
"Brotherly love???" Bo Jiasheng was shocked.
"Yes." Wu Bin nodded, "Philadelphia's nickname is the city of brotherly love."
"It sounds gay..." Zheng Wenhan couldn't help but say.
"Shh..." Wu Bin immediately silenced him and glanced at the two black brothers next to him. He was relieved when he found that they didn't seem to hear him.
"It's other people's territory, be careful what you say and do." Wu Bin whispered.
"I understand." The two nodded.
From leaving the airport to the University of Pennsylvania, apart from the buildings whose styles are completely different from those in China, the biggest difference is that almost every street can see people performing, singing, dancing, painting, and playing. It has everything. I don’t know if this is a unique Philadelphia culture or if it is the same in the United States.
PS: I’m on vacation after a long period of work. Thank you for your hard work to all the readers who have been waiting for the update.