Fish-eye lens correction and stitching
The correction and stitching of the fisheye lens involved the following contents: ** 1. Fish-eye lens correction ** 1. ** Extracting the camera's parameters ** - First of all, the fisheye camera's parameters had to be obtained, including the lens distortion model and the camera's internal and external parameters. These parameters could describe the optical characteristics of the fisheye lens and the camera's imaging geometry. 2. ** Distortion correction ** - The distortion in the image was corrected using the obtained camera correction parameters. This was usually achieved by re-projecting each of the elements to make the lines and shapes of the image more straight and natural. 3. ** Perspective transformation (for the corrected shape)** - The image after fisheye correction would often become a circle or hemisphere, so perspective transformation was needed to restore it to a standard rectangular or square shape. This was achieved by adjusting the projection method of the image. 4. ** Image Cropping ** - After the perspective transformation, the image might be distorted or have black edges. Image trimming could remove invalid areas and edges, ensuring that the image was complete and without distortion. In addition, there were other methods of correction: - ** Polar line correction method (for paired images)** - This was a common technique in computer vision. Before use, feature points were extracted from each image using algorithms such as SIFT, URF, and ORB. Then, these feature points were matched to find the corresponding points in the two images. Then, the epipolar line between the two images was calculated using the essential matrix or the fundamental matrix. Finally, each image was corrected by the epipolar line. The correction process included calculating the epipolar lines for each image, calculating the rotation matrix to align the epipolar lines, rotating and translating the images to align the epipolar lines, and trimming and zooming the images to make the distance between the pixels equal. This method is helpful to improve the accuracy and efficiency of disparity calculation and 3D matching. - ** Sphere Projection Method ** - The basic idea was to expand the fisheye image from a spherical surface into a flat image, so that the straight line in the image would still be a straight line after the expansion, thereby eliminating the distortion caused by the fisheye lens. The specific steps were: First, select the appropriate center of the sphere (such as the position of the optical axis of the fisheye lens or the center of the front end), establish a spherical coordinate system (the longitude and latitude correspond to the x and y coordinates of the image respectively), and then map each point of the fisheye image to the spherical surface according to its spherical coordinates to obtain a spherical image. Then, expand the spherical image into a planar image (using methods such as orthonormal or oblique projection), and finally perform post-processing such as distortion removal, trimming, rotation, etc. on the planar image to obtain the corrected image. There was also a correction method that involved self-supervised pre-training: - Firstly, a fish-eye image data set was constructed and the fish-eye image was divided into 2D image blocks. A self-supervised pre-training module was used to perform self-supervised pre-training to extract the fine-grained distortion representation of the fish-eye image. Then, the representation was used to learn the full-scale map flow through the fish-eye image correction module, and the corrected fish-eye image pair was obtained. ** 2. Fisheye lens stitching ** 1. ** Image Capture * - Using multiple fisheye lenses to capture overlapping images, it was necessary to ensure that there was a certain overlap between adjacent images so that subsequent image stitching could be carried out. 2. ** Image correction ** - The image captured by each fisheye lens is corrected and converted into a planar image. The correction algorithm such as the polar line correction method or the spherical projection method can be used. 3. ** Steps to Mosaic Images ** - Characteristic point matching: detect the key points in the image and match these key points between different images. - Image Fusion: Fusing the matched images to obtain a complete panoramic image. 4. ** Post-processing ** - After the mosaic, the panoramic image was adjusted and post-processed, such as cutting, color correction, and distortion removal. In addition, there was another fisheye image correction stitching method: - Firstly, a fish-eye image data set is constructed and divided into 2D image blocks. Self-supervised pre-training is used to extract a fine-grained distortion representation to correct the fish-eye image to obtain a corrected fish-eye image pair. The corrected fish-eye image pair is divided into a target image and a reference image, and the target image's picture element is relocated to the reference image plane by using a map.(The two-dimensional map is directly estimated for the overlapping region in the target image, and the loss of the non-overlapping region is regularized to obtain the target image after the map is obtained). Finally, the target image after the map and the reference image are fed to the Siamesemae network to be mixed to generate the final panoramic mosaic image. Read more exciting novels for free
Simple rat blocking board for kindergarten canteen
The rat blocking board could be used to prevent rats from entering the kindergarten canteen and ensure the safety of the canteen environment. There were aluminum alloy and stainless steel rat traps available on the market. The price ranged from 10.00 to 15.00 yuan. The height was generally 50cm. The width could be customized, starting from 100 cm. There were also customized models such as 100 cm wide x 50 cm high (non-refundable). Some brands, such as Huachuang and Hegang, could customize the appropriate rat blocking board according to the actual size of the canteen entrance and exit, and there were types suitable for various regions. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Invitation letter inviting kindergarten parents to build snowmen
Dear parents, Hello! Winter had arrived and snow was falling. It was a season full of fun and surprises. In order to improve the parent-child relationship, let the children better experience the fun of winter and feel the charm of nature, we specially invite you and your child to participate in the snowman activity organized by the kindergarten. Building a snowman was a very interesting activity and had many benefits for children. It can let children know about snow and understand the functions and uses of snow; it can let children experience the fun of playing with snow and stimulate their love for nature; it can also cultivate children's creative awareness and cooperative spirit, and train children's strong will to not be afraid of the cold. [Event time: specific time] [Event venue: The kindergarten playground or other designated location] On the day of the event, please wear warm clothes, shoes, gloves, and other cold-proof equipment. Let's laugh together in the snow and create a cute snowman with our children to leave behind beautiful memories. I look forward to your participation! [Name of the kindergarten] [specific date] <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What novel is Meng Yao from?
Meng Yao was a character in the online novel "Treasure Mirror". She also appeared in the novel "Love Like Rain Stopping". In addition, she was also mentioned in "I Didn't Know How You Were"(when Meng Yao and Shi Su were young). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Does the triangular bone grow fat?
Triangular bones would not gain weight. The triangular bone was located in the shoulder and connected the upper limbs to the torso. Above it was the acromion and below it was the head of the radius, which played a role in supporting the upper limbs. However, from the perspective of being associated with weight gain, the area where the triangular bone was located might change in appearance due to a variety of situations: - If one often did heavy physical labor or strenuous exercise, it might cause the acromion and greater humerus to collide with each other, resulting in the phenomenon of acromion protrusion. This was not the " fat " of the triangular bone itself. - In the process of aging and obese people, the bone marrow would fatten. However, this was a change in the bone marrow and not the " fatness " of the triangular bone. However, this change in the bone marrow would lead to a series of problems that affected bone health, such as a decrease in bone density and hardness. In addition, if the triangular bone was used as a food, the triangular bone contained a certain amount of calories. During the weight loss period, moderate consumption generally would not gain weight, but excessive consumption may cause excess calories to be converted into fat accumulation in the body, causing the body to gain weight. The novel "Ledge" is equally exciting. Everyone is welcome to click and read it!
Landscape arrangement for the kindergarten graduation season
The kindergarten graduation season was an important moment in the growth of children. The careful arrangement of the environment could add more beautiful atmosphere to this special period. In terms of color selection, blue could be used as the main color. For example, a dark blue background cloth could be chosen. It formed a sharp contrast with the hot summer. From the exhibition board to the hanging ornaments, from the decoration to the corner design, it could give people a fresh and cool feeling. Or use the original color, such as wood color, although it seems to lack innocence, but can show the charm of nature, other colors on the basis of wood color to neutralize, will not appear abrupt; Classic black and white can also play with new tricks, with fresh macarons as embellishments, high-end and grand; If from the child's point of view, you can also choose a variety of light and fresh color combinations, full of innocence and simplicity. As for the layout of the rostrum, the light blue background was matched with the clouds arranged by the thin yarn. Together with the hot air balloon painted by the teachers and children, it was clean and comfortable. If the elements of the bachelor's hat were added, it would be more suitable for the graduation theme. From a distance, the bachelor's hat with tassels floating in the clouds was like a bird flying into the distance. It could also be used to form a long exhibition board and decorated with large flowers and grass paper-cuts. Sunflowers were also a good choice, symbolizing the positive children. The bright colors of the sun and flowers could save the overly serious background color. There were "clouds" hanging above the stage like cotton candy. The rainbow, sun, moon, little stars and other children's favorite cartoon shapes were all good decorative elements. They could also use pure color geometric paper-cut (gold, silver, and other shiny paper were preferred) to decorate the stage background, and string up colorful balloons around it to enhance the color tone. They could also use the diagonal arrangement method to arrange colorful origami, balloons, etc. in the two corners to enhance the color and fill in the gaps. Simple colorful theme words could reflect the graduation ceremony atmosphere. If you want to create a beautiful rainbow element, you can use colored paper to arrange a curved rainbow bridge, or use cloth and crepe paper to increase the soft texture. You can also match the colorful hearts with rainbow tassels and hang the colorful fabric. They could also start from one point and use a divergent layout. If the theme was starlight, the curtains would be arranged in a random way. The colors would be uniform and full of childlike fun. Using balloons to build a star bridge, or fixing the stars strung together on chairs in different positions to create a sense of disorder, simple pasted arrangements could also achieve good results. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
I love you China lyrics
The lyrics of "I Love You, China" were: "Larks fly across the blue sky, I love you, China." I love you, China. I love your vigorous seedlings in spring, I love your golden fruits in autumn. I love your green pine temperament, I love your red plum character. I love the sweet cane of your hometown, like milk nourishing my heart. I love you, China. I love you, China. I want to dedicate the most beautiful song to you, my mother, my motherland. I love you, China. I love you, China. I love your blue waves rolling in the South China Sea, I love your snow-white Northland. I love you for the boundless forest, I love you for the lofty mountains. I love your gurgling stream, with its clear waves flowing through my dreams. I love you, China. I love you, China. I want to dedicate my beautiful youth to you, my mother, and my motherland. Ah, ah, I want to dedicate my beautiful youth to you, my mother, my motherland." <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
12-year-old child has bloodshot eyes, what medicine should be used to treat it?
If a 12-year-old child's eyes were bloodshot due to lack of sleep, rubbing his eyes, and other physiological factors, there was generally no need to take special treatment. He should rest more and avoid rubbing his eyes with his hands. If it was caused by sinutis, it may be necessary to use external antibiotics eye drops under the guidance of a doctor, such as levofloaxin, tobramycins, etc., or anti-viral eye drugs, such as ganciclovir, aciclovir, etc.; If it was caused by scleretis, it was necessary to follow the doctor's advice to use external steroids, such as pretendinone. If it is eye fatigue caused by overuse of the eyes, you can use some eye drops to relieve eye fatigue, such as soybean eye drops. However, it was not recommended to take the medicine by themselves. It was recommended to find out the cause of the disease first and take the medicine under the guidance of a doctor. As he did not see the specific picture, he could not accurately determine the specific condition of the bloodshot eyes. He suggested that he seek medical attention in time. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Transportation to Cornell
Cornell University is located in the small town of Ithaka in the Finger Lakes area of central New York. Here are some common transportation routes to Cornell University: 1. ** Arrival at Ithaka-Tompkins County Airport **: If you arrive at the airport, you can take bus No. 32 (Monday-Friday)/No. 72 (Weekend) as the airport special line. The starting point is Ithacea Tompkins Regional Airport, and the terminal is Tompkins County Public Library. It passes through the Trip hammer Mall, Cornell university, College town, and other places. It can directly reach the campus. It is suitable for freshmen or returning students who don't have a lot of luggage. The bus line operated from 7:12 a.m. to 9:43 p.m.(the last bus time would be extended on weekends). The interval between each bus was about half an hour, and it took 40 minutes to reach Cornell University. 2. ** Arriving at Syracuse Hancock International Airport (SY R)**: Syracuse Airport is about 60 miles away from Cornell University. It will take about an hour to drive south along highway 81. Since the Syracuse public transport system had not yet opened a connecting route to Syracuse International Airport, and there was no airport bus service, there were only two options from the airport to the city or other parts of New York State, namely, taking a taxi or renting a car. If you don't have much luggage, you can also take the most economical airport bus No. 32 (Monday to Friday)/No. 72 (weekends) to the campus. 3. ** Arrival at New York's major airport (JFK, LBA, ECPR)**: After arriving at the airport, you will need to transfer to other means of transportation to go to Ithaka Town, where Cornell University is located. The public transportation facilities in the town of Ithaka were not as developed as those in the big cities, but the bus in Ithaka could reach almost all the main off-campus apartments and the shopping areas of the town. You can take the Ithacia bus to Cornell University. For example, the No. 10 bus is the connecting line between Downtown and the campus. The frequency is very frequent, and the interval between each bus is 6 - 12 minutes. The No. 30 bus is the connecting line between Downtown and Pyramid mall. It passes through Cornell campus, and the interval between each bus is about 15 minutes. Route 51 was the connecting line between College Town and East Hill. Students who lived in off-campus apartments in Maplewood, Maple Hill, Summer Hill, and Snyder Hill often took this bus or Route 82. Route 81 connected Cornell University's North and South Campus. The interval between each bus was about 15 minutes. In addition, to other cities in New York State, you can take the Greyhound bus or rent a car. Students who live close to school and like sports can also use bicycles as their preferred means of transportation. If the economy allows, buying a car is also a very convenient way to travel. While waiting for the TV series, he could also read the exciting content related to this site!
Do I need to write out my resume for the college entrance examination?
If it was a college degree, it usually needed to be written in the resume. In the educational background section of the resume, state that your educational background is a college, including the school you graduated from, the major you studied, the date of graduation, and other relevant information, so that the employer can fully understand the education of the job seeker. This helped the employer to assess whether the candidate met the job requirements based on their educational background. For example, some jobs might have preferences or specific requirements for the way to obtain academic qualifications (general recruitment or other methods). At the same time, when competing with other job applicants, accurately filling in their academic qualifications was also an honest and complete display of their own qualifications. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Breastfeeding period breast has agglomerated what medicine to use to recover quickly
Breastfeeding lumps can be caused by many reasons. Different reasons have different medications. The following are some common situations: 1. ** Milk siltation or early stage of acute mastiff **: - Usually, medication was not considered first. One could first massage the breasts to promote the discharge of milk, or use a breast pump to discharge milk. - If medication was needed, cefradine, penicillin, and other antibiotics could be used for anti-infection treatment under the guidance of a doctor. Cephalothems can prevent the synthesis of bacteria cell walls and have a disinfecting effect. They can be used for mastiff caused by bacteria, but they should be used carefully according to the doctor's advice to avoid harm to the baby. - It could also be taken by mouth. Its ingredients included dandelion, antler, pseudo-ginseng, etc. It could soften and disperse hard masses, clear away heat and detoxify, and also had the effect of anti-bacteria, anti-inflammation, relieving breast pain and eliminating lumps. At the same time, it could be taken with Xiaoyao Pill to relieve chest and rib pain, loss of appetite, and breast swelling caused by liver qi stagnation. 2. ** If it is breast cancer during breast-feeding (rarer)**: - This kind of situation required a professional evaluation at the hospital. It could be treated with surgery such as breast preservation surgery or total mastectomy. It might not be solved with medicine alone. The specific treatment plan needed to be formulated according to the condition. If there is a lump in the breast during breast-feeding, it is not recommended to buy medicine for treatment. It is recommended to go to the hospital in time to find out the cause and treat it under the doctor's judgment. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>