How to choose the lens of the car lens
The following factors can be considered when choosing a car lens: 1. ** Usage scenario **: - The lens design was different for different car cameras. If the functions of the car's front view, surround view, and DPS lens were different, there would be differences in design. For example, Hongjing Optoelectronics 'forward-looking, binoculars, and DPS lenses used f-tan 0 ortho-projection, focusing on the guarantee of optical main points, etc., while the surrounding lens used a Holographic model design to ensure a high density of surrounding graphics. The In-Cabin lens in the cabin would use different band options and possibly RGBI-R Confocal design. - The functions of imaging cameras (surround view, rear view, built-in camera) and sensory cameras (front view, side view camera) were different, and the lens requirements were also different. The imaging camera was used for panoramic parking, reversing, monitoring the driver's status, etc. The sensory camera was used to provide lane departure warning, blind spot monitoring, and other functions. 2. ** Optic performance index **: - The quality of a lens could be measured by optical parameters such as focal length, aperture, distortion, and resolution. For example, distortion would affect the degree of distortion of the image. In the application of vehicle vision, optical companies needed to indicate what kind of distortion model was used on the specifications because the distortion model would affect the difficulty of the algorithm and the success rate of the verification. Different lenses, such as DV, Front, LM, RVP and other conventional lenses, often used f - tan theta-orthography;Fisheye fisheye lenses often used f -theta-equidistance projection; AVI and other surround lenses often used 2*f*tan(theta-theta2) three-dimensional projection. - With the upgrade of the image quality, the number of aspheric glass lenses needed to be combined in the lens increased to reduce aberrations. The curvature and diameter of the lens could be adjusted, and the technical requirements for manufacturers increased. At present, the 8M camera needed to combine multiple aspheric glass lenses with spherical glass lenses. 3. ** Adaptability to the environment **: - The car lens had to meet the requirements of the complex use environment, such as the need to be exposed to harsh environments for a long time (strong light, sand, rain, mud, etc.), so it had to be able to meet high and low temperature impact, corrosion resistance, vibration resistance, waterproof and salt fog resistance tests. - Compared with plastic lenses, glass lenses had the characteristics of high heat resistance, low distortion, high light transmission, and high refraction index. The imaging effect was better, and the influence of thermal difference was small. It was more in line with the harsh working environment and high performance requirements of the car lens. Therefore, the car lens was mostly all-glass lens or glass-plastic hybrid lens. Generally, the front view lens, high-resolution lens, etc., which had high performance requirements, were more inclined to glass lenses. 4. ** Adaptability with the algorithm **: - Different optical distortion design models would facilitate different algorithms. For example, the optical distortion design model for different application scenarios was convenient for stitching algorithms and visual effects, and the band selection for different application scenarios was convenient for recognition algorithms and visual experience. 5. ** Anti-stray light ability **: - In practical applications, the car lens would face a variety of light environments, and it was prone to stray light. For example, the "ghost" phenomenon when taking photos with a mobile phone could also appear in the car camera. This required the lens design, material selection, and other aspects to consider reducing the generation of stray light and ghost images, such as optical design simulation, coating process, structural design optimization, and so on. 6. ** Special Function Requirement **: - For example, in order to cope with the impact of the weather on the imaging and recognition of the lens, the lens and camera module should have an automatic auxiliary heating function to quickly remove the water, ice, frost, etc. on the surface of the lens. Read more exciting novels for free
Back to the drama
The reference mentioned a short drama called " Back to 1994." This short drama had a total of 96 episodes, which told the story of the ex-husband's remarriage after divorce. It was a story of the former love. In the story, the male and female protagonists were once a loving couple. After divorce, they lived separately and experienced different emotions and life changes. A street encounter allowed them to reunite. The ex-husband began a long road to remarry, but the female protagonist was afraid of repeating the same mistakes and was cautious. The ex-husband still needed to make more efforts to prove his change and sincerity. There was also a mention of a trembling video that involved a love story related to the front, but the plot was relatively simple. It was mainly a short conversation between the two people who had not contacted each other for many years and a topic related to child support. The novel, Drunken Golden Cup, is equally exciting. Everyone is welcome to click and read it!
Hair Fanning Face
In the anime " Kempfer,"" Love Research Institute," and " Swaying Lily," there was an infinite loop of slapping. In addition, in a certain anime, there was a plot of Sha You slapping the blonde, which might involve anime content related to hair slapping the face. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What are the common aberrations of machine vision lenses?
In addition to the color difference between the polychromatic light, the lens could be divided into five types of aberrations, namely spherical aberrations, coma aberrations, aberrations, field curvatures, and distortions that affected the similarity of the images. The spherical aberration was caused by the different condensing abilities of the points on the lens surface of the lens. The converging points of the near-axis light and the far-axis light were different. The converging light formed a circle of dispersion that was symmetrical with the optical axis as the center, resulting in blurred images. It was related to the size of the aperture. The image was clearer when the aperture was small, and the image was blurred when the aperture was large. Coma aberrations were aberrations caused by off-axis imaging. After parallel light rays emitted from a point outside the optical axis passed through the optical system, they formed an symmetrical diffused spot on the image plane, shaped like a comet. Its size was related to the aperture and field of view. Aspect was also a type of off-axis aberrations that was only related to the field of view. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Once upon a time, there was a Spirit Sword Mountain, who did Zhou Mumu like?
Zhou Mumu liked A Ye (First Love) and Zhan Ziye. While waiting for the TV series, he could also read the exciting content related to this site!
Wandering the earth is beautiful, do you know?
According to Zhihu's rankings," The Wandering Earth 2 " was listed on the 2023 Zhihu High Scores Movies List, the 2023 Zhihu High Scores Chinese Movies List, the 2023 Zhihu Annual Hot Discussion List, and the 2023 Zhihu High Scores Sci-fi List. This showed that the film had received more recognition on Zhihu. However, there were also some other views. For example, some people questioned the feasibility of the planetary engine in Wandering Earth 1 to change the Earth's orbit from a scientific point of view. In addition, there were also in-depth discussions about the original plot of " The Wandering Earth," such as the controversy reflected behind the plot of the main character's army rebellion. In general, Zhihu's evaluation of the Wandering Earth series was diverse. There were voices of affirmation, but there were also questions and discussions from different angles. Wandering Earth 2: Adventures Again is not enough. Everyone is welcome to click to read the novel!
Earning more money is your only way out
Making more money is your only way out. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Is the female CEO's cultivation husband over? What's the name of the novel?
The novel " The Female CEO's Cultivation Husband " was the original work of the signed author " Second Master of Jiangmen " on the Blackrock Reading Network. It was first published and signed exclusively on the Blackrock Reading Network. However, the reference did not mention whether the novel was completed or not. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
A novel infected by the virus in the end of the world
The following are some recommendations for novels related to the virus in the apocalypse: - " Acid Rain Doomsday ": In the novel, people are vicious in the apocalypse. Someone releases the plague virus into the fallout shelter for supplies. The infected people will have symptoms such as festering and itching in a short period of time. Even the superpowered people will not be spared. Although Doctor Xia had developed a drug to alleviate the symptoms, he still had no idea how to cure it completely. Meanwhile, Ji Shaohui had initially found an antidote for the virus. - [Doomsday: The story of the apocalypse.] - [Life of Calamity]: A catastrophe reduced the world to a wasteland where order collapsed. - [Demon Hunter's Hand]: After the nuclear war, the massacre spread throughout the world. It is speculated that there may be dangers such as virus infection in such a chaotic post-apocalyptic environment. - " The 10th Year of the Apocalypse ": A sci-fi novel written by Fu Hua, depicting the life of the female protagonist 10 years after the apocalypse. - " Doomsday Passerby A " was written by the cat, Xiao Jian. The female protagonist had not been reborn in the apocalypse and had no supernatural powers. She had to survive in the apocalypse, which was full of dangers, including possible virus infection and other crises. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What books are there in the novels of traveling through Xiangjiang?
The following were some novels that involved traveling through Xiangjiang: " Playing in Xiangjiang "," Xiangjiang's First Sister-in-law [80]"," Shocking, I caught the criminal with a fortune-telling "," Xiangjiang Detective "," Xiangjiang Fortune Teller, A Fortune Teller,"," Metaphysical Beauty Explodes Xiangjiang "," The Original Wife [80] Dressed as a Rich Young Master in Xiangjiang ", etc. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>