Fisheye lens panoramic spherical mosaic
Fisheye 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. Read more exciting novels for free
Fisheye lens drone
Fisheye lenses could be used in drones. For example, LAOWa has a 4mm F2.8 210° circular fun fisheye lens that can be used for drone aerial photography, suitable for a variety of camera mounts such as Fuji micro-single X mount, Sony micro-single E mount, etc.; Chuangan Optoelectronics developed a 0.7mm, F2.8, 210° M8 fisheye lens, which was successfully applied to the visual obstacle avoidance of drones. By installing this lens in four directions, it could achieve no dead angle image acquisition. The image could be processed to give movement instructions to bypass obstacles. It could cruise automatically with the satellite positioning system and cooperate with the ground station for image big data analysis. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is a camera software with a fisheye lens?
The Fisheye app included the Fisheye app, which was a unique mobile camera app. It had a powerful function, version 1.05, and a size of 1.86MB. It had a variety of functions, such as a variety of effects to easily create large-sized photos, a time-lapse function, and a rich material library. When editing photos, it was very convenient to cut, add text, or filter. There were also simulated 170-degree wide-angle fisheye lenses, four professional fisheye lenses, and dozens of LOMO effects. It allows users to experience different shooting fun and take a variety of styles of photos. In addition, when the fisheye camera system was built at the Northern Corona Observatory, Sharpcap software was selected to automatically capture fisheye images. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Which fisheye lens software is better?
Currently, there were some fish-eye lens related software, such as the POCO camera, which was a popular mobile phone camera tool launched by the POCO.TN original photo community for mobile phone users. It had a built-in fish-eye camera lens and many other special lenses, as well as excellent filter, extreme light effects, and other functions. There was also the Fisheye lens app, which was a special effects camera software. The user could use the fisheye filter to capture the world in the eyes of the fish. There were eight types of fisheye lens to choose from, and a large number of filter to use at will. It also provided 28 flexible layout, ultra-fast selfie function, 90 color filter, etc. You could choose according to your needs, but it was difficult to directly determine which software was better. It depended on the user's specific needs in terms of functions and effects. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Pentax full-frame fisheye lens?
Pentax had full-frame fisheye lenses, such as the Pentax DA Fish-Eye 10 - 17mm f/3.5 - 4.5ED fisheye lens (zoom), which had an attention index of 100 and a price of 2889 yuan. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to take pictures of buildings with a fisheye lens
When using a fisheye lens to shoot a building, you can use its distortion feature to create an effect to compose the scene. Because of its wide focal length, it is often possible to combine the elements behind it, emphasizing the lines in the composition to create an expressive architectural photo. It could shoot landmark buildings from a new angle. The fisheye effect would distort the scene, presenting a very exaggerated bending effect, thus creating a different visual experience. In addition, when shooting buildings, you must know how to use light. In the morning, you can shoot with the light to illuminate the details of the building. The side light helps to express the three-dimensional sense of the building. If the line of the building is more beautiful, you can reduce the exposure and shoot at a backlighting angle. Silhouette techniques can be used to strengthen the line structure. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Is there a big difference between a panoramic lens and a wide-angle lens
The panoramic lens was mainly used to show the full view of the scene or the movements of the whole body of the character. It was used to show the relationship between the characters and the environment. It was a lens concept defined from the perspective of shooting content and usage. The wide-angle lens was a lens with a shorter focal length than the standard lens and a larger angle of view than the standard lens. According to the focal length and angle of view, it could be divided into ordinary wide-angle lens and super wide-angle lens. This was a concept defined from the perspective of the physical properties of the lens. From the perspective of the imaging effect, the wide-angle lens had a wide viewing angle and a large depth of field. It was suitable for shooting long and panoramic images. It could show open space and grand scenes. It had distortion effects. If used reasonably, it could present a unique visual effect. If used incorrectly, it would cause the image to be distorted. The panoramic lens did not mention these characteristics. There was a big difference between the two, and each played a different role in the filming. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
360 degree fisheye camera
There were many brands that supplied 360-degree fisheye cameras. For example, Joan had a 360-degree panoramic fisheye camera, and Puwei had a panoramic 360-degree network HD camera, a smart house-keeping remote Wi-Fi surveillance VR panoramic fisheye camera, and so on. These cameras usually had a panoramic surveillance function, which could achieve large-scale surveillance without blind spots. Some of them also had a variety of image display modes, video security encryption, and other functions. Different products might have differences in terms of price, image quality, and functional details. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The process of using the spherical camera
The 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. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
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. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
spherical hollowed-out relic
The 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. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>