What are the external parameters of the camera?
The external parameters of the camera were the parameters in the world coordinate system, such as the camera's position, rotation direction, and so on. In terms of specific values, there were six external parameters of the camera, including the rotation parameters of the three axes (
External parameters of the camera
The external parameters of the camera were parameters in the world coordinate system, mainly referring to the rotation and translation matrix between the camera systems, such as the position and rotation direction of the camera. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The relationship between the internal and external parameters of the camera
The internal parameters of the camera mainly included light sensitivity (USB), shutter speed, aperture, AF-ON, depth of field button, M-GN, image confirmation, lens aberration correction, high USB noise reduction, unequipped memory card release shutter, gridline, white balance, color temperature, saturation, etc. These internal parameters affected each other and were also related to external parameters such as the external shooting environment of the camera. The higher the sensitivity value, the brighter the picture, but the higher the value, the lower the quality of the picture and the more noise. The higher the shutter speed, the less light entering, and the lower the brightness of the picture. On the contrary, the higher the light entering, the brighter the picture. However, the shutter speed should not be too low when shooting high-speed moving objects to avoid blurring the picture. The larger the aperture value, the smaller the aperture, the deeper the depth of field, the less light entering, and the darker the picture. On the contrary, the lighter the depth of field, the more light entering, the brighter the picture. AF-ON can be set to switch between single-shot focus, autofocus, and servo-autofocus, which affects the focus mode. The depth of field button can be set to the photo style to choose portrait or landscape shooting. M-GN can be set to drive mode, focus mode, white balance, and light measurement mode. After clicking M-mn, the settings can be switched. Image confirmation can set the time the photo stays on the camera, which is convenient to check the effect of the photo. The sensitivity can be adjusted by setting the minimum and maximum values; the peripheral brightness correction, distortion correction, digital lens optimization and other operations in the lens aberration correction affect the dark angle and distortion of the picture; the high Iso noise reduction can adjust the brightness of the picture in dark environments; the setting of releasing the shutter when the memory card is not installed is related to whether the shutter can be pressed when the memory card is not installed; the grid line can be used as the reference line for composition; The white balance color temperature affected the color of the screen. If it was less than 5200, it would be cold, and if it was greater than 5200, it would be warm. The saturation affected the color of the screen. The external parameters, such as the light intensity of the shooting environment, would affect the settings of the internal parameters. When the light is dim, you may need to increase the sensitivity, reduce the shutter speed, and increase the aperture to ensure enough light. When shooting external situations such as high-speed moving objects (such as sports events), the shutter speed needs to be set higher. When shooting different subjects such as people or scenery (external parameters), you can use the depth of field button to set the photo style to better shoot. Internal parameters such as white balance and saturation needed to be adjusted accordingly to achieve the ideal color effect under different shooting scenes (external parameters). <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>
Recording parameters of camera
The camera recording parameters mainly included the following aspects: 1. ** Video format **: There are two types of video, namely, feast and PAL. China (Europe)'s television industry standard was PDA, while the United States (Japan, South Korea, and other countries)'s television industry standard was NSA. The video frame rate that could be selected was 25 frames per second (50 frames, 100 frames) in the PDA format, and 30 frames per second (60 frames, 120 frames) in the NSA format. It was recommended to choose the Polar format for filming in China to avoid the phenomenon of light strobing. 2. ** resolution **: It refers to the number of the number of the displayed image in each picture. It is usually expressed by the product of the number of horizontal and vertical images (for example, 1920X1080) or the number of vertical images (for example, directly marked as 1080). The higher the value, the finer the image and the better the quality. 3. ** frame rate **: For example, 1080P 60fps, 1080P 30fps, etc., often appear together with the resolution. 4. ** Bitrate (Bitrate)**: This is also a setting that needs to be selected before shooting a video. 5. [** USB (Light Speed)**: Can be adjusted in professional video mode or movie mode. When the USB is low (e.g. around 100), the picture will be more delicate, with less noise and higher contrast. However, high sensitivity will easily produce noise. After determining the shutter and aperture, the USB is mainly used to coordinate the light in the picture.] 6. ** Shutter Speed **: Normally, the shutter speed is twice the number of frames. For example, if the video format has a frame rate of 25 frames, the shutter speed can be set to 50. If the shutter speed is lower than this value, the video will have a serious smear effect. If the shutter speed is higher than this value, the image will be clearer. 7. ** Aperture **: The aperture size affects the depth of field effect of the picture. The smaller the aperture, the larger the value, and the deeper the depth of field. The larger the aperture, the smaller the value, and the lighter the depth of field. For example, F5.6 was easy to shoot with a shallow depth of field (the subject was clear and the background was blurry), while F16 had a deeper depth of field. 8. ** Recording format **: If there are no special requirements, you can choose to record a 1920*1080 25 frame MOV format HD video. If there are special requirements for zooming in, you can choose 4K or other format. In addition, when shooting with multiple cameras, it was recommended to set up a unified video recording format to reduce the trouble in the later stages. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What are the camera parameters?
The camera's parameters were divided into two parts: 1. * * Internal reference: - focal length (fx, fy, generally equal): It is related to the optical characteristics of the camera lens and affects the zooming in or out of the image. - Coordinates of the principal point (x0, y0, relative to the imaging plane): In the ideal case, the optical axis of the lens passes through the middle of the image, but in reality, there is an error due to the installation accuracy. This is used to describe this error. - Axis tilt (s, 0 in the ideal case): A variable that reflects the difference between the camera's x-direction and y-direction size reduction ratio. It can convert the length measured by the number of pixels into the length measured by other units in three-dimensional space. It can also indicate the difference between the x-direction and y-direction scale transformation. - Distortion parameters (including the distortion of the radius and the direction of the cut): This is used to describe the distortion effect produced when the lens maps a three-dimensional space straight line onto the image. Under ideal circumstances, the lens should map the straight line into a straight line, but there is actually a deviation. 2. * * External reference **: - Rotation Matrix: It is used to describe the direction of the coordinate axis of the world coordinate system relative to the camera coordinate axis. It is used to determine how the world coordinate point will rotate and fall on the camera coordinate point. - Translational Matrix: It described the position of the origin of space in the camera coordinate system, which was the relevant parameters of the world coordinate point after translation to the camera coordinate point. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
camera sensitivity parameters
The parameters related to the camera's sensitivity were the light sensitivity and the minimum illumination. In terms of light sensitivity (USB), the lower the USB, the clearer the photo would be, and the less noise there would be. In the video recording mode, the setting of the sensitivity was related to the camera mode, and the fourth setting was the shutter speed in the camera mode. When the video was being recorded, it became the automatic limit of the sensitivity for time-lapse photography. For example, it could be lowered to 6400 to reduce the value. The minimum illumination is an important indicator to measure the sensitivity of the CCD-based camera. It represents the corresponding environmental illumination when the environmental illumination is reduced to a certain level, so that the video signal level output by the CCD-based camera is reduced to a certain value. For example, when the environmental illumination is reduced to 0.04lx, the output video signal of the CCD-camera is reduced to 50% of the maximum magnitude, then the minimum illumination of the CCD-camera is 0.04x (F1.2), and the minimum illumination of the CCD-camera is related to the maximum relative aperture of the lens used. When providing the minimum illumination of the camera, the relative aperture of the lens during the test should be indicated. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Nightclub camera parameters
To take photos in a dark environment like a nightclub, the camera parameters were set as follows: - Aperture: If you want to ensure the depth of field (clear front and back), the aperture can be set to a small aperture, such as F8 - F13. However, in some special cases, if a large aperture is needed to increase the amount of light, a relatively large aperture value such as f/4.5 (Ref. 3) may be used, or a large aperture lens such as f/1.8 (Ref. 6) may be used to adapt to dark environments. - ** Light sensitivity (USB)**: If the camera has good noise control, such as the Nikon Z6 II (Ref. 6), you can also get a clear picture in dark and night environments with high sensitivity. You can increase the USB. However, in general, the higher the USB, the more noise it may produce. If a tripod or stabilizing device is allowed, try to use a low USB (such as 100 USB) to ensure the quality of the photo (reference 1). However, if you can't use a tripod and you want to avoid blurring the photo, you can increase the IQ appropriately, even if it will cause some noise (Ref. 1). For example, the information in the third document stated that the value of the spell was 3200. - ** Shutter Speed **: If the camera is fixed (such as using a tripod), you can use a longer shutter speed to get enough exposure, such as 20 seconds (Ref. 1). However, if it was hand-held, the shutter speed needed to be determined according to the anti-shake performance of the camera and the movement of the subject to avoid blurring the photo. A faster shutter speed such as 1/200 second (Ref. 3) might be used. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Sunset camera parameters
Here are some of the camera settings for shooting sunsets: ** 1. Exposing Mode ** 1. ** Aperture priority mode (Av or A)** - The aperture can be set between F8 - F16. In this mode, the camera automatically adjusted the shutter speed according to the set aperture, allowing better control of the depth of field and clear images of both near and far scenes. 2. ** Manual mode ** - Setting the parameters manually could allow them to respond to different scenarios more flexibly. ** 2. Light sensitivity (USB)** - Normally, it was set to between 100 - 400. If you wanted a more detailed picture with less noise, you could set it to 100 or lower. A low IQ would ensure the quality of the image in a well-lit sunset scene. ** 3. Metering Mode ** 1. ** Spot Metering ** - He changed the focus mode to center single-point focus and the light measurement mode to spot measurement. Then, he aimed at the clouds around the setting sun. Be careful not to focus on the building or the sun, or the image will be too bright or too dark. 2. ** Focus Average Metering ** - You can also set the measurement mode to focus on average measurement, which takes into account the key areas of the picture and the overall lighting situation. ** 4. Shutter Speed ** - If you use manual mode, the shutter speed can be set to 1/30 second or longer (depending on the shooting needs). ** 5. White Balance ** - You can choose the daylight white balance (or choose the appropriate color temperature value yourself, such as adjusting to the fluorescent light cool white can create a purple-pink romantic atmosphere, making the shooting scene more like the sunset atmosphere). ** 6. Shot ** - According to the shooting needs, you can choose 18 - 24mm or 100 - 400mm lenses. ** 7. Other Equipment and Points for Attention ** 1. ** Tripod ** - It's best to have a tripod to hold the camera, especially when using a slower shutter speed or taking long shots (such as time-lapse photography) to avoid blurring the picture due to camera shake. 2. **ND fade filter (option)** - If there was a ND filter, it could better balance the exposure difference between the sky and the ground. If not, try shooting the scene twice to mix the exposure. <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>
Sonyx280 camera external microphone
If it was a Sonyx280 camera connected to an external microphone, the first thing to do was to check the manual for the external microphone. Generally speaking, the external microphone was usually connected to the rear port, and the rear switch needed to be turned on. If the external function button of the camera could be directly set, then it could be directly set. If not, then it needed to enter the camera menu to set it. At the same time, he had to ensure that the connection between the canon's mouth was intact and check if the needle inside was broken. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>