0108 Dynamic Visual Capture Ability

It is said that being apart for a few days feels like three long autumns. Chen Jue found himself liking Teacher Wu’s appearance and looks more and more.

As for Wu Fang, she brightened up the moment she saw Chen Jue appear.

“You haven’t been around for a few days. Did you get a hair transplant?” Wu Fang leaned in curiously to greet him.

She noticed that this seemingly magical guy, absent for a few days, looked sunnier than before.

Not only was his hair trimmed short, boldly revealing his forehead, but even the previously faintly visible scalp had vanished.

He stood taller and straighter, his increasingly broad shoulders and strong upper body filling out the black-and-white sports jacket he wore. His steps were steady and firm; though walking at a leisurely pace, he carried the poise of a model on the runway.

Clean, fresh, and vigorous—though his looks were rather ordinary, the confidence and composure on his face made him a solid seven on the handsome scale.

Not as stunning as a celebrity, but enough to turn a few heads on the street.

“A hair transplant? Not at all! That’s risky and can cause rejection side effects. I’ve been going to bed early and waking early, and got some traditional medicine from the hospital. Slowly taking it brought my hair back,” Chen Jue fibbed to Teacher Wu, running his hand through his coarse, short-cropped hair.

For a man, whether or not he has hair makes a huge difference.

“Traditional medicine is that effective?”

“Ahem... I might try some for myself when I get back,” Wu Fang cleared her throat a few times; evidently, her flu hadn’t fully cleared.

Chen Jue had read online recently that flu viruses and mycoplasma pneumonia were spreading fiercely, stubborn viruses without any particularly effective cure. Ordinary people who caught it might cough for over a month.

Wu Fang’s recovery within a week showed her strong immunity.

Early to bed, early to rise, plus frequent morning exercises—her physical fitness was evidently far superior to the average person’s.

Just then, Zheng Yuan, who was setting up test equipment in the classroom, came trotting over excitedly.

“Jue Ge, for this project, I even invited a highly skilled senior to supervise it.”

“You and my sister will have to help me with the tests later! Afterward, I’ll treat everyone to a big lunch.”

“Sure, just say what you need,” Chen Jue nodded, pulling out the various dart props he had prepared earlier.

Wu Fang also brought along a red-tasselled spear and a rope dart. Though still carrying the illness, it seemed to affect her little.

Unexpectedly, while chatting with Wu Fang about the last live stream’s popularity, an unexpected figure appeared.

Zhou Chuan walked into the training room, carrying textbooks and a laptop.

“Huh?”

“Senior Chen, you’re here too?” Zhou Chuan looked somewhat puzzled.

Because Chen Jue was on his medical tracking list, Zhou Chuan had a deep impression of him.

“I’m here to help Zheng Yuan with the tests,” Chen Jue greeted him, thinking how small Jiang University’s campus really was.

To his surprise, the senior Zheng Yuan invited was none other than Zhou Chuan, the infamous “super nerd” of Jiang University!

But considering the peculiar nature of Zheng Yuan’s project, it made sense to invite someone equally eccentric as Zhou Chuan.

“You? Helping Xiao Yuan with the tests?”

“You’re the dart master he mentioned!” Zhou Chuan was a bit stunned, curiously re-examining Chen Jue.

He had misjudged at their last meal—who would have thought this auditing student with gallstones hid such remarkable talents?

“Senior Zhou, we’ll be counting on you to oversee the physical test data!” Zheng Yuan, seeing everyone gathered, enthusiastically introduced the group.

There were eight participants in total: Zheng Yuan and his girlfriend, three roommates placed in the ordinary control group, and Chen Jue and Wu Fang, two invited outsiders, assigned as the experimental martial artist group.

---

“Martial artists?”

“I haven’t even taken any certification exams yet. Can I really deserve that title?” Chen Jue chuckled as he saw his name entered in the testing system.

Wu Fang, on the other hand, cooperated by presenting her Level One athlete qualification certificate, along with a Wuying-level martial arts rank certificate.

Martial arts athletes have a different grading standard from ordinary athletes, ranging from lowest to highest: Martial Child, Level Three Warrior, Level Two Warrior, Level One Warrior, Wuying Level, and International Wuying Level.

To earn the Wuying certification, one must at least place in the top three at a national Level One martial arts championship.

“Didn’t expect Teacher Wu to be so hidden and talented!”

“The past martial arts championship videos should be online, right?” Chen Jue scrutinized the Wuying certificate a few more times.

Wu Fang, noticing Chen Jue’s curious gaze, blushed slightly, quickly putting both certificates back into her small bag after Zheng Yuan took photos.

...

After introductions, they formally began the testing.

According to Zheng Yuan, the tests covered several areas: dynamic visual capture ability, limb reaction speed, wrist strength, and the damage power of dart throws.

The ordinary control group went first; Zheng Yuan and his roommates put on similar VR glasses and started testing.

Chen Jue, Wu Fang, and Zhou Chuan watched the real-time feedback data projected onto a screen.

“Zheng Yuan: 15 frames naked eye.”

“Lin Xiaoyue: 17 frames naked eye.”

“...”

“Junior Zhou, is this frame rate the same unit as a computer monitor’s refresh rate?” Chen Jue asked, curious about the feedback data.

Zhou Chuan nodded and explained, “It’s roughly the same, but with some differences. The average human eye reaction speed is about one-tenth of a second, around 100 milliseconds.”

“To test individual dynamic visual capture ability, the best method is to distinguish frame rates with the naked eye, determining the eye’s upper limit.”

“In the film industry, movies used to be shot at 24 frames per second—24 frames per second means each frame lasts 41.6 milliseconds. Beyond 24 frames, ordinary people find it very difficult to detect frame breaks. Nowadays, digital films use over 60 frames per second, producing clearer images.”

“Our everyday computer screens refresh around 60 frames per second. But computer images differ from films due to dynamic blur and persistence of vision concepts. Computer images are single photos, whereas films insert dynamic blur during shooting, making the motion smoother.”

Zhou Chuan pointed to his laptop displaying the VR test footage.

It showed a black sphere flying horizontally across a white background. As the frame rate increased, the black ball’s motion showed more obvious breaks, which diminished as the rate rose until nearly disappearing.

The test was to see if the naked eye could catch these breaks between frames.

Once breaks vanished at a certain frame rate, indicating smooth motion, it meant that frame rate had reached the eye’s visual capture limit.

“So that’s the principle!”

Chen Jue’s face lit up with understanding, thinking how clever these top university students were to devise such a straightforward method to test the eye.

After Zheng Yuan’s group finished, Wu Fang put on the VR glasses for testing.

Her result was 26 frames, meaning she could detect dynamic images appearing every 38 milliseconds.

Compared to the previous ordinary group’s results in the teens, Wu Fang’s visual capture ability stood out.

“Next up is me!”

Chen Jue was eager. After doing “eye exercises” for over a month, he was curious about how much his vision had improved.

Taking advantage of providing data for Zheng Yuan’s project, he wanted to test his own visual limits.

“Go for it, Master Chen!” Wu Fang cheered as she took off the VR glasses.

---

Chen Jue smiled, nodded, put on the glasses, and began the test.

Meanwhile, Zheng Yuan and his friends gathered by Zhou Chuan’s side, watching the test footage on the laptop.

The black ball flew faster with increasing frame rates; frame breaks appeared less and less.

Starting at 10 frames, then 20, breaks diminished until beyond the ordinary human limit of 24 frames, when Zheng Yuan and the others could no longer see any breaks.

But Chen Jue showed no signs of stopping!

25 frames... 28... 30... the ball’s motion in the image grew smoother and smoother.

Only when it reached 40 frames did Chen Jue press pause and remove the VR glasses.

“No more. After 40 frames, I can’t see any breaks,” Chen Jue told Zhou Chuan.

Unexpectedly, everyone nearby, including Wu Fang, stared at him like he was some kind of immortal.

“40 frames naked eye?”

“Jue Ge, your eyesight is that strong?”

“Kind of abstract! Does practicing martial arts darts really improve vision that much?”

“With that vision, you could probably see a bullet’s trajectory,” Zheng Yuan and his roommates exclaimed.

But Zhou Chuan, seeing Chen Jue’s unusually high test data, was equally amazed, eyes shining like he’d found a treasure.

“40 frames, a 25-millisecond visual capture ability—that’s impressive!”

“But seeing bullets with the naked eye? That’s nearly impossible.”

Zheng Yuan and his friends were stunned.

“Senior Zhou, what frame rate would you need to actually see a bullet?”

Zhou Chuan smiled faintly, grabbed paper and pen, and calculated on the spot.

“The VR screen showing the flying black ball is 140mm wide. Assuming the weakest handgun fires a bullet at an initial velocity of 300 meters per second, the bullet takes about 4.6 milliseconds to cross the screen.”

“That means a visual capture ability of nearly 217 frames per second is needed to see the bullet flying in the frame.”

“However, human vision has limits. From seeing an object to the brain forming an image takes time. Like when you take a photo on your phone, there’s a pause before the picture is captured. This visual processing time relates to the speed of the optic nerve’s signal transmission. Foreign research shows it fluctuates around 20 milliseconds. Even the best human vision can’t beat this 20-millisecond limit.”

“So no normal human being can ever see a bullet’s trajectory.”

“If you could see a bullet flying, you wouldn’t be normal—you’d be in the ‘bullet time’ of The Matrix.”

Zhou Chuan’s data analysis thoroughly impressed everyone present.

Truly a genius! He could effortlessly pull out and compute all kinds of strange human body data on the spot, opening the eyes of Zheng Yuan and the other undergraduates.

Even Chen Jue and Wu Fang were slightly dazed, exchanging shocked looks.

“20 milliseconds visual processing limit?”

“If I spend free attribute points to boost my eyeballs and optic nerves, could I break this limit?” Chen Jue mused to himself, ready for the next test phase.

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(End of chapter)