Siheyuan: Starting from a fitter

Chapter 255 The COMS lens is born
The impact of the 10 billion dividend has gradually shown its power. Now, recruitment in various laboratories has become extremely easy, and the best of the best has been achieved.

The company is developing rapidly, and the current staff is sufficient, and Li Guocheng has become a handy shopkeeper again.Only the monthly performance communication with senior executives is rock solid.

With the experience of later generations, he will never test human nature, leave no room for people to act recklessly, and give them no chance from the beginning.

Li Guocheng regards all performance communication with senior executives more than anything else.

What sounds good is not as good as performance.Performance speaks for itself, and his plan cannot fool anyone.So he creates a profile for each person.

You can say whatever you want, as long as you dare, but the performance data tables and analysis curves will tell Li Guocheng who is really doing things and who is messing around.

Fortunately, the company is very young, and everyone now has higher pursuits. These analysis curves show that everyone has worked very hard, and their performance has also increased significantly.

Before, he did manual input, manual statistics, and manual analysis, with the computer only assisting.

Now I have written a small program, which automatically counts and analyzes data. It will also track the data for a long time. If any abnormalities are found, a red alarm will be displayed.

This allows him to safely hand over the company to others without worrying about being ripped off or funds being transferred.People can lie, data cannot lie.

After solving possible problems in company management, Li Guocheng turned his energy back to technical research.

In 1970, the CCD image sensor was invented at Bell Laboratories and became the dominant image sensor market due to its high quantum efficiency, high sensitivity, low dark current, high consistency, low noise and other properties.

In the late 90s, we entered the CMOS era.

The CCD manufacturing process is complex, and cameras using CCD are relatively expensive.In fact, after technological transformation, the gap between the actual effects of CCD and CMOS has been reduced a lot.

Moreover, the manufacturing cost and power consumption of CMOS are much lower than that of CCD, so many camera manufacturers use CMOS photosensitive elements.

In terms of imaging: the imaging transparency and sharpness of the CCD are very good under the same pixels, and the color reproduction and exposure can be basically accurate.

CMOS products often have average permeability, weak color reproduction capabilities for real objects, and poor exposure. Due to their own physical characteristics, the imaging quality of CMOS is still far behind CCD.

However, due to its low price and high degree of integration, it is still widely used in the camera field.

After many considerations, Li Guocheng decided to develop COMS lenses in advance. After all, the CCD patent had been applied for, so he chose to change the track.

At Li Guocheng's request and providing technical ideas, the Semiconductor Laboratory finally developed a CMOS lens half a month ago, but unfortunately it was only a black and white lens.

Their next research direction is to increase the color RGB mode decomposition lens with color filters.

The resolution of the first version of the COMS lens was only 480*600, but its size was about the size of a turning head.There is no way, they now design and engrave manually.

Since each CMOS pixel contains an amplifier and A/D conversion circuit, too many additional devices compress the surface area of ​​the photosensitive area of ​​a single pixel.

If measured in megapixels, more than one million ADC amplifiers are needed.

Although it is a product under unified manufacturing, each amplifier has more or less slight differences, making it difficult to achieve the effect of amplification synchronization, and the final calculated noise of CMOS is relatively high.

But Li Guocheng is confident that these differences will slowly narrow.

The patent has been applied for and covers all aspects of subsequent application scenarios, lens appearance, lens performance, interfaces, etc.

Now Li Guocheng is using micro-carving and multi-layer technology to compress it, and it has now become the size of a matchbox.After testing and comparison, the noise was reduced by 10 percentage points compared with the first version.

When I was preparing to continue compressing, I got a notification that Sam’s visa application had been completed.

He took the passport from secretary Chen Yuhe and came to Chen Li's office.

"The visa has been applied for. I'm going to leave in a week. I have some personal matters that need to be taken care of. It's inconvenient to take you and my daughter with me."

"Oh, you said it once, I know. Besides, the company can't do without me." Chen Li didn't complain.

"When the company develops for another period of time and the company's talents grow, we can go traveling together."

"I said long ago that I will not interfere with your private life. And who you are, I already knew. If you were a messy person, there are so many beautiful girls in the company, you would have hugged you from left to right. ".

Li Guocheng stepped forward, hugged her hard, and kissed her forehead.

"I'll try to come back as soon as possible. What do you want? I'll bring it to you."

"Looking at you like this, I just want to make a request. Just bring me some cosmetics."

"OK".

When Li Guocheng returned to the office, he didn't need to prepare anything. Now he had 1 U.S. dollars in the secret realm, and there was nothing to buy. It should be enough wherever he went.

Since there is no need to prepare, let’s continue studying COMS lenses.

One week is not enough time to write image processing software. The main functions are image coding and compression and image enhancement and restoration.

Image coding and compression technology can reduce the amount of data (i.e., the number of bits) used to describe an image in order to save image transmission and processing time and reduce the memory capacity occupied.

The purpose of image enhancement and restoration is to improve the quality of the image, such as removing noise and improving image clarity.Image enhancement does not consider the reasons for image degradation and highlights the interesting parts of the image.

These functions are very mature in later generations, and the basic principles can be obtained as long as you are interested.

The simple principle of the above two functions is that the values ​​of most adjacent pixels are the same, and the changes are also gradual.According to a set tolerance value, take the middle value of the pixel value in the tolerance range.

If it is compression, it is to record how many similar pixels there are, and thousands of pixels can be represented by one point.

After the software was written, the departure date was approaching.

Putting the latest Sam Nation newspapers collected by Chen Yuhe into the space, carrying a large trolley case and a small backpack, he rushed to Kai Tak International Airport in Chen Li's car.

I boarded the plane smoothly with my ticket, and my seat was in economy class.Chen Li originally wanted to buy first class, but was told that there were no available seats.But when the plane took off, through his telekinesis, Li Guocheng discovered that there were empty seats in the first class cabin.

Li Guocheng is not pretentious. After all, the purpose of going to Sam Country this time is to study and try not to cause trouble.When you study the most, work harder and learn more.

If the other person is enthusiastic, you can accept some gifts reluctantly.

His seat was close to the engine, and the two seats inside looked like they belonged to a mother and daughter.My mother is in her 30s, dignified, elegant, and a standard beauty.

The youngest daughter is about 5 years old and very polite. Seeing Li Guocheng sitting down, she took the initiative to call him 'Uncle'.

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(End of this chapter)