How much is a spherical camera?The price of the spherical cameras varied greatly. For example, the price of the Hikvision ds2dc4223iw-d network camera was 1588 yuan; the TP-Link TL-ipc55ae series (the price varied according to the card capacity), the price was between 259 - 419 yuan; there was also the Dingling intelligent pan-tilt camera X3 (with the function of a spherical camera), which was priced less than 100 yuan.
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The process of using the spherical cameraThe spherical camera had the following aspects in use:
** 1. Installations **
1. ** installation method **
- ** Lifting **: Hanging from the roof and ceiling through a support. For example, in some indoor places such as shopping malls and exhibition halls, spherical cameras are installed in this way for comprehensive monitoring.
- ** Side mounting **: Use a support to fix it on the wall or pole. This method is commonly used when installing it on the exterior of a building or the wall of an indoor corridor.
- ** Embedding **: Directly open a hole in the ceiling without any support. It is suitable for places with high aesthetic requirements and allowed by the ceiling structure, such as the office area of a high-end office building.
2. ** Installment and adjustment **
- For example, some smart spherical cameras could adjust the angle between the connecting parts by pushing specific parts (such as the T-shaped push plate), which was easy to install on the wall or ceiling. The camera body could also be installed by pulling up the limit plate, which was easy to operate to meet different installation needs.
** 2. Function and operation **
1. ** Image shooting related **
- ** Focus Control **: The user can adjust the focal distance by controlling the keyboard to obtain a panoramic view or a close-up view. For example, when monitoring a large parking lot, it could be adjusted to a panoramic view, and when checking a car's license plate, it could be adjusted to a close-up view.
- ** Focus Control **: The system will automatically focus. When the lens zooms, the camera will automatically focus on the center of the scene to maintain a clear image. In special circumstances, you can also manually focus.
- ** Aperture Control **: The camera has an automatic back-light compensation function. In a strong background, it automatically compensated for the brightness of darker targets and adjusted the lighting of the bright background to prevent the target from being unrecognizable due to the brightness or darkness of the screen.
- ** Automatic flip **: When the operator turns the lens to the bottom (vertical), the camera lens will automatically flip 180° and then turn up. You can directly view the scenery behind you, achieving 180° vertical continuous monitoring.
- ** Focus/Speed Automatic Match **: During manual control, the pan head's horizontal and vertical rotation speed will be automatically adjusted according to the distance of the focal length. For example, in the case of a long focal length, the pan head's rotation speed will be slowly adjusted, making it easier to track the target manually during monitoring.
2. ** Monitor Function Operation **
- ** Preset Point or Preset Position **: Able to store the horizontal angle, tilt angle, focal length of the camera lens, and other related parameters of the pan head in the current state into the memory. When needed, these parameters can be quickly called to adjust the pan head and camera to this position.
- ** Automatic cruise **: It can be pre-programmed to arrange some preset points into the automatic cruise queue according to the required order. An external command can make the ball machine move back and forth according to the set preset point order at a set time interval. It is suitable for the scenario of circulating monitoring multiple fixed monitoring points.
- ** Automatic scanning **: Preset the left and right limits. The camera can scan back and forth between the left and right limits at a set speed.
- ** Mode (Pattern) or Pattern Scanning **: After the user activates the recording function, the dome camera can continuously record the rotation of the dome camera and the operation trajectory of the lens within a certain period of time. The recorded operation process can be automatically replayed through the operation command.
- ** Automatic Operation **: When the user has no operation for a period of time (can be freely set), the smart ball can automatically return to the pre-set important position (guard position) or perform the pre-set functions (such as automatic scanning, pattern scanning, automatic cruise, etc.).
** 3. Special functions of different types of spherical cameras **
1. ** Smart Dome Cameras **
- Some of the smart dome cameras had the function of convenient assembly and removal, which avoided the troublesome problem of camera assembly and removal.
- Some smart ball-shaped cameras could also be rotated to increase the shooting range, overcoming the situation of limited shooting range and unsatisfactory results.
- Some smart dome cameras may also have facial image recognition, automatic tracking, voice automatic positioning, etc. They can be used for public surveillance, fugitive hunting, or video conference systems.
2. ** Pet AI camera (similar to a special spherical camera)**
- For example, the Pikfang Pet Short videos Self-made Machine, which was similar to a spherical camera, could automatically take videos of pets, edit videos, automatically search for pets in the whole house, and capture the interesting behaviors and expressions of cats and dogs. It also had the function of automatically returning to the cockpit to charge, real-time images, two-way voice, and the ability to shout to pets and hear their voices. There was also a laser on the device to tease pets, and during the operation, it could be operated through a mobile phone APP to connect to the Internet to easily achieve various functions.
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spherical hollowed-out relicThe following are some spherical hollowed out cultural relics:
- The gold-plated hollowed-out flower-and-bird ball-shaped silver sachet was unearthed from the cellar of Shapo Village, Xi'an, Shaanxi Province in 1963.
- The hollow metal ball decoration was a first-class cultural relic of the Wei and Jin Dynasties. It was unearthed in Jinsha Township, Liangzhou District, Wuwei in 1976. There were two pieces in total. It was 1 cm in diameter and weighed 1.2 grams. The gold was nearly spherical and hollow. It was decorated with beads made of silk, and all the hollowed edges were welded. The undulations echoed, and it was beautiful and clear. It is now stored in Wuwei City Museum.
- The court pearls of the Qing Dynasty, of which 108 main pearls and 30 coral pearls were carved hollowed-out. The whole was made of 108 white jade pearls strung together, divided into four sections by four jade beads. There were also three memorial strings made of 10 coral pearls and jade pendants. There were also back clouds inlaid with green jade and purple crystal pendants connected by golden-green ribbons.
- The semi-spherical hollowed-out smoking stove was from the Western Han Dynasty. It was 19.2 cm high, 8.6 cm in diameter, and 16 cm in diameter. It was a incense burner. The stove cover was semi-spherical and had hollowed-out geometric patterns. The cover and the shallow disk furnace body are connected by a button shaft. On one side of the furnace plate, there is a small chisel with a curved leaf shape, a bamboo-shaped high column, and a trumpet-shaped seat below. It is connected with the circular bearing plate. The top of the cover is missing a button. The pattern of the furnace cover is intertwined, complicated and delicate. The seat is decorated with three embossed dragon patterns. It was unearthed from the tomb of the Western Han Dynasty in the living area of Pingshuo Open Coal Mine in 1983.
- The Tang Dynasty gilded silver sachet with two moth patterns was unearthed in 1987 in the Tang Dynasty underground palace of the Damen Temple.
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What is the reaction of metal objects after entering the human body?Metal objects could cause a variety of reactions after entering the human body:
1. [Heavy metal poisoning: If heavy metal elements (relative atomic mass greater than 65) enter the human body, it may cause heavy metal poisoning.] Generally, there would be symptoms such as nausea, vomiting, diarrhea, and difficulty breathing. In the digestive system, there might be abdominal pain, diarrhea, nausea, vomiting, and other symptoms of digestive diseases. Some patients would be accompanied by black stool. In serious cases, patients would also have weakness in their limbs and symptoms of jaundiced all over the body. They might also have itchy skin, slow reaction, anesthesia, affect vision, and in serious cases, there was a risk of inducing tumors.
2. ** Metal foreign body **:
- ** Life-threatening **: For example, if a metal foreign body remains after cardiac trauma, it can cause fatal bleeding or cardiac obstruction. The position of the foreign body is easy to change, which will have unpredictable consequences.
- [** Infected **: Metallic foreign objects causing internal infection is a common complication.] The metal with bacteria could bring bacteria into the body, and the tissues around the metal foreign body would be deactivated, and the resistance would be reduced. The necrotic tissue would also provide a good living environment for the bacteria. After the bacteria survived and proliferated, it would further cause infection.
- ** Dysfunction **: Metal foreign bodies in the brain and spinal cord may compress different functional areas and cause corresponding functional reduction or loss; foreign bodies in the joints may cause functional disorder in the affected joints.
- Allergy and rejection reactions: For example, after orthopedic sterile surgery, implanted plants may cause redness, swelling, itching, and other uncomfortable reactions. Some patients may also have liquefied or dark-brown changes in the surrounding tissues of internal fixations.
3. ** Special metal elements **: For example, radioactive metal uranium, even if a small amount (50 milligrams can kill an adult) enters the human body, it may cause radioactive pollution, cancer, damage to the human immune system, etc. If it was thorium, the symptoms would be similar to the flu, and there would be hair loss and other conditions that were not easy to diagnose at once.
4. ** Reaction in the magnetic field **: If there is a metal object in the body, when it is placed in a strong magnetic field (such as the magnetic field environment of MRI), the metal object will self-magnetize. The metal object in the body may also be strongly attracted and removed.
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Fisheye lens panoramic spherical mosaicFisheye lens panoramic spherical stitching is a technique that stitches images taken by multiple fisheye lenses to form a panoramic spherical image.
First, he had to choose the right fisheye lens. This included choosing the appropriate imaging mode (such as horizontal or vertical internal cut) according to the size of the chip and the application field to effectively use the effective pixelation of the lens or chip. It was also necessary to determine the number of lenses according to the angle required by the application. For example, for 360° surround view, two fisheye lenses larger than 180° could be selected for stitching.
Then, he captured images from multiple fisheye lenses. He had to ensure that there was a certain overlap between adjacent images so that he could perform subsequent stitching.
Then, the image captured by each fisheye lens was corrected and converted into a planar image. The correction algorithm could adopt the polar line correction method or the spherical projection method. The epipolar line correction method was to project the corresponding feature points in each image onto a horizontal line. Before using this method, it was usually necessary to use some algorithm (such as SIFT, Surf, ORB, etc.) to extract the feature points from each image.
Finally, the corrected images were stitched together by a special software algorithm to obtain a panoramic spherical image.
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The world's third largest Imax spherical theaterChina's largest Imax spherical theater was located in Long Beach, Shanghai, Baoshan. It was the third largest spherical theater in the world. The inner diameter of the theater was about 37.5 x 34.5 meters, and the giant screen was about 22.4 meters wide and 12 meters high. It could accommodate about 380 people at the same time. The theater used a dome-shaped structure and a hemisphere screen to create a sky-like image, bringing the audience an extremely shocking sensory feast. The theater was equipped with naked-eye 3D effects, high-end surround sound, and world-class imaging systems to create a three-dimensional, shocking, and technological visual effect for the audience. Shanghai Long Beach was a comprehensive riverside space. In addition to the Imax spherical theater, it also included a crystal concert hall, a sightseeing tower, a yacht exhibition center, and other facilities. The design of this giant spherical cinema was inspired by the finless porpoise chasing the waves. It was like a bright pearl embedded in the river, giving people a beautiful visual enjoyment.
potential objectsPotential targets referred to the division that a person made in their heart for competitors or targets that they had an intersection with. This kind of target was not public at the moment, and the other party might not know, but he knew in his heart which people were his potential competitors or competitive targets. In a relationship, for example, if a girl asked a boy how many times he had been in a relationship, the boy would be regarded as a potential partner by the girl. And when looking for a partner, certain behaviors could also reflect the other party's attitude towards potential partners. For example, some people who already had a partner when socializing were single, but actually wanted to make more potential partners to obtain higher comprehensive benefits; Some people had been together for many years but did not talk about marriage. They might just use their current partner as a temporary companion, waiting for the opportunity to abandon their relationship and find other potential partners.
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