How to correct the distortion of the camera parameters obtained from the plane
1. First, determine the internal reference matrix of the camera.(A=(fx,0,cx;0,fy,cy; 0,0,1) and Distortion coefficient (D=(k1,k2,p1,p2,k3)\)(Usually there is no
panoramic camera distortion
The image distance of the panoramic camera was constant, and the object distance increased with the increase of the scanning angle, resulting in the distortion of the image gradually reducing from the center to the two sides. This distortion existed in the frame sensor. The scanning sensor produced an elevation projection difference and a distortion of the angular ratio. It could also be said that panoramic distortion existed in sensors that were similar to point light sources to obtain information. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The parameters of the camera
There were many parameters for the camera lens. The following were some common parameters: 1. ** Focus **: It determines the degree of zooming of the lens. A longer focal length was used for long-distance shooting. For example, a telephoto lens could be used to shoot long-distance topics such as sports competitions, wild animals, aircraft, etc., and it could also enhance the background blurring effect. A shorter focal length was used for wide-angle shooting, such as wide-angle lenses for landscape photography, architectural photography, and crowded indoor spaces. 2. ** Aperture **: For example, the main camera of the Vivo X200 Pro is equipped with a large aperture of f/1.57, which helps to take brighter and clearer photos in dark environments. Its periscope telephoto lens has an aperture of f/2.67, which can ensure the clarity and details of the picture when shooting telephoto. The size of the aperture affected the amount of light entering, depth of field, and so on. 3. ** Pieces **: It is one of the important indicators to measure the quality of the camera. For example, the main camera of the Vivo X200 Pro is expected to use a 50-million-pel large sensor, and the periscope telephoto lens is equipped with a 200-million-pel periscope telephoto lens. 4. ** Photosensor **: For example, the sensor of the HD - 3000 camera is a LCD; the main camera of the Vivo X200 Pro has a 1/1.28-inch sensor, and the periscope telephoto lens has a 1/1.4-inch base. 5. ** View angle **: For example, the helmet camera lens is a 3.7mm pinhole lens with a 90-degree view angle. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The parameters of the camera
The main parameters of the camera lens were as follows: - Aperture: controls the amount of light that enters the lens. The smaller the aperture, the greater the amount of light that enters the lens, and the more obvious the background blurring effect. For example, in a dark environment, a large aperture could allow more light to enter the camera and take a bright photo. At the same time, it could highlight the subject and blur the background. - ** Focus **: determines the angle of view and magnifying power of the lens. The short focal length lens had a wide angle of view and was suitable for shooting large scenes such as landscapes. The long focal length lens had a narrow angle of view and could zoom in on distant objects. It was often used to shoot portraits, close-ups, or sports events that needed to be zoomed in. - ** Shutter Speed **: The length of time the shutter is opened. A fast shutter speed could freeze instantaneous movements, which was suitable for shooting moving objects, such as fast running athletes. A slow shutter speed could capture the trajectory of the object's movement, such as shooting a smooth effect when shooting water. However, a slow shutter speed needed to be used with a tripod to prevent blurring caused by hand shaking. - [Depth-of-field]: It refers to the range of clear images before and after the focal point. A large aperture would cause the depth of field to become shallow, that is, the clear range before and after the focus was small; a small aperture would cause the depth of field to be large, and the clear range before and after the focus would be wide. - ** Light sensitivity (USB)**: It indicates the sensitivity of the camera to light. The higher the value, the more sensitive the camera was to light. In a dim environment, the camera could increase the brightness by raising the value, but an overly high value would cause noise and affect the image quality. - ** White Balance **: Adjusts the camera to ensure that white objects appear white under different lighting conditions. Automatic white balance (AWB) for daily shooting can basically meet the needs, but it can be manually controlled in special scenes or when you want to change the image effect, such as using the built-in scene mode, manually adjusting the K value, etc. - ** Distortion **: Different types of lenses may have different degrees of distortion. For example, wide-angle lenses may produce barrel distortion, and telephoto lenses may produce pincushion-shaped distortion. This was something to take note of when shooting objects that required strict shapes such as buildings. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The perspective distortion of the camera lens
The perspective distortion referred to the change in relative size and position between objects in the shot. Its main characteristic was "near big, far small". For example, when shooting a road, the distant road would get closer and closer to finally converge into a point. Similarly, the closer the lens was to the subject, the larger the subject appeared. The further away from the subject, the smaller the size change in the appearance of the subject. For example, train windows, the change between the windows closer to the lens was obviously larger than the change between the windows far from the lens. The change in size between the windows was smaller the further back. The perspective distortion was only related to the shooting distance and had nothing to do with the focal length. However, in actual shooting, in order to maintain the same size of the subject, different focal length lenses needed to adjust the shooting distance, which would cause differences in perspective distortion. Generally speaking, a wide-angle lens needed to be shot close to the subject, so the perspective distortion was large. A telephoto lens needed to be shot far away from the subject, so the perspective distortion was small. A short focal length (such as 18mm) would produce a wide perspective, and the objects in the picture would appear to be far away, resulting in strong perspective distortion. This distortion was more obvious when shooting buildings with straight lines; a long focal length (such as 200mm) could eliminate or reduce perspective distortion, making the objects in the picture more realistic. In addition, different shooting methods and equipment would also affect the perspective distortion. For example, using a large frame shiftable camera and shiftable lens to shoot could effectively prevent perspective distortion; finding a suitable height to shoot to ensure that the camera lens was parallel to the vertical line of the building to avoid building distortion; post-adjustment could also deal with perspective distortion. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Understanding of camera parameters
The following is an understanding of some common camera parameters: ** 1. Image quality-related parameters ** 1. ** Pieces ** - Pieces were the smallest unit that made up an image. For example, if the long side of a photo was 6000 pixelation and the wide side was 4000 pixelation, the photo would have 24 million pixelation. Usually, the higher the resolution, the clearer the image would be when magnified. However, the quality of the image was not entirely dependent on the resolution, but also on the size of the sensor. For photography, the resolution was an important consideration. Although some people thought that 20 million pixelation was enough, there were advantages to having a higher pixelation. Unless they often shot sports and dark environments, the high sensitivity of high-pixelation machines could not be considered for the time being. This was because some flagship machines sacrificed high pixelation for sports scenes in continuous shooting and high-sensitivity balance. 2. ** size of the sensor ** - There were different types of full-frame and half-frame sensors. The size of the sensor affected the image quality. For example, full-frame sensors might have certain advantages in terms of image quality. 3. ** Picture format ** - The main ones were the RAW format and JPG format. If you don't want to do post-processing, JPG format will do, but if you want post-editing, it's more suitable to choose the RAW format. 4. ** Picture Quality and size ** - For daily shooting, the size can be adjusted to large size and the image quality can be adjusted to high quality. However, when shooting news topics and other situations that required quick release, the photo size might have to be adjusted to M or S. 5. ** Picture Style ** - The camera had a variety of photo styles. It was recommended to choose the "standard" style for daily shooting unless there were special needs or you wanted to try other styles. ** 2. Exposure-related parameters ** 1. ** Aperture ** - The larger the aperture, the brighter the image. The aperture settings were different in different shooting scenes: - The aperture for landscape shots was usually F8 - F11. - When shooting portraits, you can use the maximum aperture or the maximum aperture can be reduced by one stop. - In cultural street photography, if you need to blur the environment, the aperture is F2.8 or larger. If you don't need to blur the environment, it is F8. - The aperture for macro shooting was F8 - F11. - The aperture range for shooting the starlight effect was F8 - F11. - When shooting flowers, birds, and insects, the aperture should be at F5.6 or below, and the best is to have an IQ of 400 or less. - The aperture also affected the depth of field. The larger the aperture, the shorter the depth of field. 2. ** Shutter ** - The slower the shutter, the brighter the image. There were different shutter speeds for different subjects: - The shutter speed needed to be above 1/60s to shoot general body movements. - Walk for more than 1/125s. - Faster than 1/500s. - Running for more than 1/1000s. - Skiing 1/2000s and above. 3. ** Light sensitivity (USB)** - The higher the sensitivity, the brighter the image. For daily shooting, you can set it to "STAR"(automatic sensitivity). When you use manual (M), you may manually adjust the sensitivity to control the image exposure. ** 3. Focus related parameters ** 1. ** Focus point ** - The more focal points a camera of the same brand had, the better. However, different brands had different focusing techniques, and the speed of focusing could not be compared by the number of focal points. 2. ** Face recognition, eye focus ** - It could focus on a person's face, eyes, and even animal eyes. Many new models had this function. ** 4. Other parameters ** 1. ** White Balance ** - Automatic White Balance (AWB) for daily shooting basically meets the requirements. Manual control is required for special scenes or when you want to change the image effect, such as through the built-in scene mode, manual adjustment of K value, etc. 2. ** Metering Mode ** - This included evaluation photography (Nikon Matrix Metering, Sony-called Multiple Metering), spot photography, partial photography, center-emphasized photography, etc. The most commonly used was evaluation photography, but in complex situations, spot photography, center-emphasized photography, etc. might be chosen. 3. ** Anti shake performance ** - The anti-shake function could reduce the probability of taking photos and making it easy to hold the picture when shooting videos. However, the body with anti-shake function was usually more expensive and needed to be chosen between budget and functional requirements. 4. ** Continuous Shooting Speed ** - If you often shoot sports, you need to pay attention to this parameters. Daily applications can basically be ignored. 5. ** Highest and extended IPs ** - If you are often involved in extreme subject matter shooting, you can consider this factor, but you don't have to consider it for daily use. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What are the camera parameters?
The camera shooting parameters included many aspects: 1. ** Picture format and quality **: - There were two types of photo format: RAW and JPG. If post-processing was not needed, the JPG format was fine, as it took up less memory. If post-editing was needed, the RAW format was more suitable, as it saved more original environmental colors, but most of the photos were gray and took up a lot of memory. 2. White Balance: - Automatic White Balance (AWB) could basically meet the needs of daily shooting and restore the true color of the environment. If you want to adjust the environment, you can also adjust the color temperature parameters later. In addition, the lower the white balance value, the colder the image, suitable for shooting night scenes, snow scenes, etc. The higher the value, the warmer the image, suitable for shooting sunrise, sunset, autumn, etc. 3. ** Light sensitivity (USB): - For daily shooting, the sensitivity could be adjusted to "STAR"(Automatic sensitivity). Now the camera had better high-sensitivity and the image quality was less affected. However, it could also be manually adjusted to 100, unless the three elements of exposure needed to be adjusted to a higher IQ or the quality of the photo was not high. When shooting in low-light areas at night without a flash, it was generally necessary to increase the IQ. 4. ** Compensation for exposure **: - In Aperture priority/Shutter priority mode, the setting of "0EV" was generally sufficient for most scenes. In the automatic mode, aperture priority, and shutter priority modes, the exposure compensation was increased when the photo was dark, and decreased when the photo was bright. 5. ** Shooting Mode **: - There were mainly automatic mode, automatic program mode, P-mode, aperture priority, shutter priority, manual exposure, and other modes. 6. ** Metering **: - Most of the time, you can choose to evaluate the light measurement (matrix light measurement, average light measurement). It can measure the entire shooting scene to meet the needs of most scenes. There were also center-focused average dimming (the dimming area was about 1/3 of the middle of the screen) and spot dimming (about 3% - 5% of the screen) to choose from. 7. Focus: - Commonly used focusing modes were single-point autofocus AF-S (suitable for shooting still objects, etc., half press the shutter to focus once), servo-autofocus AF-C (suitable for capturing moving subjects, half press the shutter to maintain tracking focus), smart autofocus AF-A (automatically select AF-S or AF-C, according to the subject's movement or stillness), and manual focus (manually adjust the focus ring, use when autofocus is not available or when there is an error). 8. ** Picture Style **: - There were many settings such as auto, standard, portrait, and landscape. It was recommended for beginners to choose the standard style first, and then choose or set other styles after familiarizing themselves with photography and camera usage. 9. ** Different shooting scene parameters **: - ** Scene (M-file)**: On a sunny day, around 100, F8, 1/200. On a cloudy day, around 400. - ** Aperture priority mode (LV)**: - Scenery photos taken in the light: F8 - F11, exposure compensation 0. - When shooting a portrait, the maximum aperture or the maximum aperture was reduced by one stop, and the exposure compensation was 0. - Street photography: F2.8 or higher (requires virtual environment)-F8 (does not require virtual environment). - For macro photography, F8 - F11. - [Starlight effects: F8 - F11] - For shooting flowers, birds, and insects, the aperture should be at F5.6 or below, and the best was to have an IQ of 400 or less. - ** Shutter priority mode (TV)**: - General body movements: 1/60s or above. - Walking time: 1/125s or more. - [Fast travel: 1/500s and above.] - Running: 1/1000s or above. - Skiing: 1/2000s and above. - [Bike: 1/2000s and above.] - Normal speed of the car: 1/2000s or above. - [Flight distance: 1/500s] - Follow-up photography: 1/60s- 1/4s - [Freezing birds nearby: 1/4000s] - [Fog Sea: 1/4s or slower] - ** Manual Mode (M)**: - Full Moon: 1/500s, Isotta:200, F5.6 - F8(Clear). - Crescent Moon: 1/500s, USB:200, F4 - F5.6(Clear). - [New Moon: 1/500s, USB:400, F4] - Firework: 1s- 4s, USB:200, F8. - [Lightning: B-door, USB:200, F8 (until the end of the shot, the environment should be darker).] - Street light line: 15s, USB:100, F11 (adjusted according to street brightness). - Water surface boat light line: 30s, USB:100, F8 (adjusted according to environmental brightness). - Galaxy: 30s, USB:1600 - 6400, F2.8 (with super wide angle). - Star Orbit Shooting: Each photo was exposed for 30 seconds, and the next photo was taken at an interval of 1 second. At least 120 photos were taken and stacked later. - Flower Shooting: 1/125s, F2.8, USB:100(sunny weather). - Scenery: 1/125s, F4, USB:100(sunny). - Night scene: 1/15s, F1.8, and 200. - Ripping motion: 1/500s, F2.4, USB:100. - Wedding room: 1/125s, F2.8 - F8, Isotta:400. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Restore camera parameters
If it's a Huawei phone, you can click on the camera icon to set it up. After entering the camera interface, click on the settings icon in the top right corner. In the settings interface, find the last column "Restore default values" and click it. After clicking OK, all the values will be restored to the default values, and it will automatically return to the camera interface. You can also turn on the camera, then open the MENU key, find the symbol of the wrench, find the settings to clear all, and you can restore some of the previously messed up parameters to their original values. There may be differences between different models of phones or cameras, and some operations may not be applicable to all devices. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Japanese camera parameters
The following are some examples of camera parameters for Japanese style photography: - ** Rainy day series **: White balance is 5600K, white balance offset is B4M4, photo style is neutral mode, detailed style parameters are: Strength +4, Fineness +1, Critical Value +1, contrast-4, saturation-2, hue 0. - ** Japanese Fresh **: White balance is K5200, white balance offset is B2, M2, photo style is portrait mode, detailed settings are: intensity 3, precision 4, critical value 4, contrast-3, saturation +1, hue +2. - ** Warm Japanese TV Series **: White balance set to K4800, white balance offset set to B1, G2, photo style set to neutral mode, detailed settings set to intensity 2, precision 3, threshold 1, contrast-4, saturation-2, hue 0. However, in actual shooting, it still needed to be adjusted according to the specific shooting environment, shooting equipment, personal creativity, and other factors. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The parameters of the camera in the library
The settings of the camera in the library would vary according to different shooting scenes and effects: - ** Portrait in the room (Assuming you are taking photos in the library)**: Shutter speed 1/80s, sensitivity 1500, aperture below F2.8. - ** Still life (such as taking pictures of books and ornaments in the library)**: Shutter speed 1/80s- 1/200s, sensitivity 100 - 400, aperture F1.2 - 4. It should be noted that these parameters are only for reference. The actual shooting may need to be adjusted according to the specific lighting conditions, the subject, and the desired artistic effect. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Combined camera parameters
Here are some common camera parameters: 1. ** Light sensitivity (USB)**: The lower the USB, the clearer the picture and the less noise. For daily shooting, you can set it to the "STAR"(automatic sensitivity), and when it's in the manual (M), you can manually adjust it to control the image exposure. 2. ** White Balance **: Used to obtain the correct color, and can also play a role in rendering. Automatic White Balance (AWB) could basically meet the needs of daily shooting. In special scenes or when you want to change the image effect, you can manually control it, such as using the built-in scene mode, manually adjusting the K value, etc. 3. ** Picture format, size, picture quality **: The photo format can be in the format of RAW or JPG. If you don't want to retouch the picture, you can choose JPG. If you want to retouch the picture, you can choose the format of RAW. For daily shooting, you can adjust the size to large size and the picture quality to high quality. However, when shooting news topics and other things that require fast release, you may have to adjust the photo size to M or S. 4. ** Picture Style **: The camera has a variety of photo styles. It is recommended to choose the "standard" style for daily shooting unless you have special needs or want to try other styles. 5. ** Metering Mode **: There are evaluation measuring modes (Nikon Matrix Metering, Sony Multi-Metering), spot measuring, partial measuring, center-emphasized measuring, etc. The most commonly used is evaluation measuring. 6. ** Focus mode **: Choose AF-S + single-point autofocus for daily shooting and AF-C + extended focus for shooting moving objects. 7. ** exposure compensation **: In aperture priority/shutter priority mode, it is usually set to "0EV". Most scenes can be shot. At the same time, it must follow the "white plus black minus" rule. Different models of cameras might have some specific parameters. For example, some cameras had specific internal parameters to set white balance shift, photo style intensity, precision, threshold, contrast, saturation, color tone, and so on. For example, in the backlit scene, you can set the white balance to K5800, the white balance offset to B2, M3, the photo style to portrait mode, and set the intensity: 5, the precision: 4, the critical value: 3, the contrast: -3, the saturation: +2, the hue: +2, etc. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>