The Military-industrial Scientific Research System of the Academic Master Chapter 966

Chapter 966: Let Americans sleep poorly

No matter what the Indians think, the Chinese side actually doesn't care much about their rhythm.

Especially the aviation industry.

It is really realized on a practical level that it is better to buy than to build, and it is better to rent than to buy -

If the Indian army really uses the money invested in the LCA project to buy ready-made aircraft, the threat it can pose may be even greater.

In short, after the first batch of pre-production J-10A entered service, Chang Haonan quickly forgot what he said at that time.

During this period, his main job was to improve the image processing system of the Haiyang-1 satellite.

Not only the satellite side, but also the part that needs to be processed on the ground after the data is returned.

And what are the results...

There are already some clues.

January 14th.

The first snow in 2002 seemed to come no later than in previous years.

Although a large number of municipal workers and people were mobilized, the heavy snowfall that lasted all night caused a lot of trouble to road traffic early in the morning despite insufficient equipment.

So when Chang Haonan got out of the car, he almost missed his step.

But there was no way. He had determined the date of this results report meeting himself, and he really couldn't rely on others.

In fact, the heavy snow even triggered temporary power outages in many areas.

The planned meeting location suffered as a result.

Fortunately, the Fifth Research Institute of Aerospace Science and Technology is a key target of ensuring power supply, so it can continue to operate in another place -

The results report meeting was not a technical seminar, and most of the participants were leaders related to the Haiyang-1 satellite project.

As a result, the location of the Torch Laboratory seems a bit remote.

The Fifth Aerospace Academy is just right.

What's a bit bizarre is that the former has been working on this project for several months, but this is his first time here.

Coupled with the heavy snowfall that covered everything with snow, he was a little confused about his direction for a while.

Fortunately, at this time, a familiar voice sounded from not far away:

"Mr. Chang, welcome."

Chang Haonan turned around and saw Lin Senming striding over to greet him:

"Mr. Lin?"

He stepped forward and shook hands with the other party:

"What a coincidence, you just arrived too?"

"Hey... I saw you driving in and found that the comrade responsible for guiding the guests hadn't arrived yet, so I came down from the office specifically."

Lin Senming replied:

"It snowed last night. I was worried that I wouldn't be able to catch up today, so I didn't go home and spent the whole night in the office..."

Obviously, this person is also a person who forgets to eat and sleep when working.

Ever since, within two sentences, the topic between the two people returned to today's report meeting:

"Mr. Chang, I summarized the part of the content I was responsible for last night, and I felt...it was difficult to come up with a sufficiently intuitive display."

"Although there are a lot of data and charts, only an expert can understand those things. Today..."

He didn't continue at this point, but the meaning was already very obvious.

Most of the people here today are leaders. Although there are also people with technical backgrounds, after all, there are so many different fields, not to mention that image recognition is still an extremely abstract and novel field.

However, Chang Haonan looked relaxed and even patted Lin Senming on the shoulder:

"It doesn't matter. I'm prepared. Just organize the report meeting as planned."

The latter is still a bit skeptical.

But after all, Chang Haonan, who made the final decision, said so, and there was someone tall enough to support him even if the sky fell, so he nodded in the end.

Perhaps due to the weather, the leaders who came to attend the meeting generally arrived a little late.

Fortunately, it still did not affect the normal start of the report meeting.

For Chang Haonan, reporting in such a relatively closed environment is already a familiar task.

However, Lin Senming was still somewhat nervous.

After a brief introduction, the general background of the satellite is introduced, as well as an overview of software programming.

Logically speaking, these two parts are relatively dull content.

But as he listened, Chang Haonan felt something was wrong.

Too scripted.

Especially the software design part.

Even leaders with professional backgrounds do not know much about the computer field.

However, Lin Senming started with an energy functional of the C-V model and the LBF model, followed by a curve evolution theory and variational level set method model, and finally ended with an active contour model improved by local binary fitting...

If it's a technical meeting within the project team, it doesn't matter, but the report meeting... still needs to be concise and easy to understand.

Taking advantage of the gap between the two paragraphs, Chang Haonan looked around and found that many people on both sides of the conference table were either frowning or drowsy.

Although Ocean One is a nominal project of the ministry, even if it fails today, it is unlikely to have any serious consequences.

However, the degree of tilt in funding will inevitably cause problems.

More importantly, Chang Haonan also pointed out that he would use the funds from this project to continue developing multi-phase image segmentation and tracking technology.

So, after finally getting through the first two parts, Chang Haonan chose to start from the middle part of the PPT as soon as he took the stage.

"Dear leaders and colleagues, Comrade Lin Senming has just introduced to you the theoretical basis for our target contour segmentation. Next, let me show you our research results over the past month."

In fact, I can't completely blame Lin Senming for being boring.

If you want to show the effect of satellite image processing, first of all, you must have enough satellite images in your hand.

However, Haiyang-1 is China's first ocean remote sensing satellite...

Therefore, when testing before, the project team used relatively abstract calculation methods to conduct testing. But it is obviously less intuitive.

However, Chang Haonan thought of a remedy in time before the report meeting.

"Everyone, please look at these pictures."

He directly controlled the PPT to turn to the next page.

No formulas or numbers, just four pictures.

Slightly dull picture.

A dark image composed of a regular pentagon and an ellipse on a gray background.

"The color of the picture is painted on for visual effects. During the actual processing process, the background pixels will be simplified to a certain extent to reduce the pressure of information transmission..."

Attendees who have just been fed too much mathematical symbols need this kind of intuitive and simple image to relieve themselves.

Chang Haonan could clearly feel that many people had cheered up again.

"Next, I will show the relationship between the evolution curve C and the target contour C* under the condition of piecewise constant value."

While speaking, Chang Haonan clicked the mouse, and a white round frame appeared on the first picture:

"In picture (a), when the evolution curve C surrounds the real target contour C*, the energy functional inside the curve C is greater than zero, while the external energy is close to zero; and in (b), when the real target contour C* surrounds When curve C is reached, the energy functional inside curve C is close to zero, and the external energy is greater than zero..."

"In other words, for any part of the evolution curve, we only need to calculate its internal and external energy functional values separately to determine its positional relationship with the real target contour."

"When the calculation results of its internal and external energy are close to 0, it can be judged whether it coincides with the target contour..."

At this moment, the originally lifeless conference room suddenly became lively—

Except for some busy international waterways, there are actually not that many ships in most areas of the ocean.

In other words, most of the photos taken by ocean surveillance satellites only have a sea background.

Therefore, even if you just separate the target area and the background area and exclude data that only has background but no target, you can greatly reduce the communication pressure on the space-to-ground link and shorten the response time of the entire space-based reconnaissance system.

This does not include the efficiency of secondary identification after the ground receives the data.

Find an aircraft carrier from 10,000 photos, and find an aircraft carrier from 100 photos.

The difficulty is obviously not on the same level.

"Comrade Haonan."

The speaker was Wang Shuguang, the head of the State Oceanic Administration.

He certainly has no direct connection to the Navy.

But in principle, Haiyang-1 is a satellite belonging to the State Oceanic Administration.

Naturally, he was invited to attend today's meeting.

"I noticed that the four pictures you used all have uniform grayscale backgrounds, but the actual ocean background may not be so ideal. Even in the deep sea, there is a high probability of heterogeneous grayscales."

"Can your algorithm distinguish the grayscale differences between the backgrounds in different areas, as well as between the target to be observed and the overall background?"

This question is indeed a professional one.

It's not easy even for people in the Navy to imagine.

"sure."

Chang Haonan showed a smile:

“Actually, as long as the fitting function corresponding to the evolution curve is used to replace the gray level mean in the model in the local energy term.”

"In most cases, the picture captured in a photo does not involve too many complicated grayscale heterogeneous conditions. Combined with the weak performance of the spaceborne computer, we can basically handle it by selecting two fitting functions. Most of the time."

While talking, Chang Haonan continued to turn the pages.

This time, an overhead picture of a port appeared on the PPT.

More importantly, although the clarity is very poor, it can still be seen that there is a full-deck ship parked in the lower left corner of the picture.

"This is…"

Wang Shuguang frowned and realized that things didn't seem simple.

"The environment feels a bit familiar..."

"Wait a minute, isn't this Jinmen Nanjiang Wharf?"

Someone soon recognized the location:

"So this ship is the Kiev?"

"That's right."

Chang Haonan replied:

"This is a photo taken by a 244-channel CCD optical reconnaissance camera. I applied to the Air Force and got it just a few days ago."

"In addition to the Kiev, there are several other large ships whose outlines can barely be seen clearly."

"And after our processing."

He clicked the mouse again.

In an instant, except for the ground, dock buildings and the few ships, all parts involving the water surface turned into a light gray background with uniform grayscale.

“Even in shallow sea areas with complex hydrological conditions, we can still identify large surface targets!”

After finishing speaking, Chang Haonan turned around again.

In the conference room, silence fell again.

But anyone could tell that this time, it wasn't due to listlessness.

Instead, he was shocked to the point of speechlessness.

"boom-"

Until a crisp sound broke the silence.

It was a naval leader who was holding a tea cup. He accidentally knocked the bottom of the cup on the edge of the table.

Apparently, the technology doesn't even have to be put into practical use.

As long as a little leakage is revealed, it will be enough for Americans to have trouble sleeping...

(End of chapter)

Chapter end

Report