How does the camera contrast light and dark?

Advantages and disadvantages of contrast between light and shade

1, another advantage of contrast between light and dark is to weaken the messy environment. When the subject is bright and the background is dark, it will not interfere with the subject even if the background is chaotic. Spot metering is used to measure the subject, and other scenes in the shooting background will be covered by shadow tones.

2. It can form a level of light and shade, giving people a unified beauty of simplicity, brightness, simplicity and harmony. Disadvantages of the same color contrast: the use of the same color collocation lacks a sense of color layering and belongs to a weak color group.

3. The intensity of light and shadow makes the work layered, highlighting the central figure and central idea. He is good at using the effect of spotlight, highlighting the main body, depicting the image of strong contrast between light and shade, and has a unique personal style. Rubens, a Flemish painter, pays great attention to the contrast between light and shade and the use of color, and has a unique grasp and application of lines.

Hello, there are similarities between high-definition cameras and ordinary standard-definition cameras, such as appearance structure, switch design, operation and use. However, the realization of HD mainly depends on technological breakthroughs, especially in the unique scanning format.

1. Measurement of definition: When testing multiple high-definition surveillance cameras, the same lens should be used (fixed focus and two variable lenses are recommended), and the given scale lines *** 10 vertical lines and 10 horizontal lines should appear on the left and right sides of the monitor screen according to the central circle of the test card, so as to count clearly and accurately.

The advantage is that in the same environment, high-definition monitoring can provide clearer and more delicate images, better capture details and achieve clear and identifiable goals. Clear picture quality provides favorable conditions for intelligent monitoring, so the high-definition monitoring camera can provide more high-definition pictures with more contents and details, thus creating conditions for the application of intelligent monitoring.

Mobile phone photography technology and skills

1. First of all, the photographer should be familiar with how your mobile phone camera works and understand its limitations. Usually, mobile phone cameras have a certain shutter speed range and fixed aperture, so users need to know them well and get the best exposure effect by adjusting ISO.

2, mobile phone photography skills are as follows: from another angle, most people pick up their mobile phones and shoot, and the height is also around the chest. Of course, this is the most comfortable posture. But if you want to bid farewell to plain photos, you might as well try it from another angle.

3. Mobile phones with powerful camera functions generally support these scenes-ordinary, intelligent, macro, portrait, landscape, sports, night scene, snow scene, etc. , close to professional digital SLR. If you have time before taking pictures, try to adjust to the corresponding scene, let the machine find the most suitable aperture, focal length and shutter time, and control the white balance.

4, the basic knowledge of mobile phone photography skills are: composition rules: put the theme of photography in about one-third of the picture, giving people a more harmonious aesthetic feeling. Use curve composition and diagonal composition with perspective effect. Handle the relationship between photosensitive surface and backlight surface.

5. The mobile phone photography skills are introduced as follows: Choose the appropriate focus. For mobile phone photography users, the first thing to learn is focusing. Many people pick up their mobile phones to take pictures, relying on their own focusing ability, and no one chooses focusing operation artificially.

6, basic knowledge of mobile phone photography skills: clever use of light, composition, focusing, filters, etc. Clever use of light is the soul of photography. If you are good at using sunlight, you will take lively photos. When shooting, we must pay attention to the relationship between the subject, shooting position and angle, and lighting conditions.

Basic course of light for SLR photography

1. Aperture priority AE is an automatic exposure mode in which the photographer manually selects the aperture size when shooting, and the camera automatically selects the appropriate shutter time according to the scene brightness, CCD sensitivity and manually selected aperture, that is, the exposure mode of manual aperture automatic shutter time.

2.④ When shooting people on the beach, in the snow, in sunny places or in front of a white background, you should increase the exposure and use a flash, otherwise the subject will be very dark. ⑤ When shooting a snow scene, the background light is strongly reflected by the snow, and the photometric deviation of the camera is particularly large. Increase the exposure at this time, or the snow will turn gray.

3. Generally speaking, when shooting moving things, use the shutter to give priority to automatic exposure; If you shoot something that is dead and can't move, you should use the aperture to give priority to automatic exposure. When you are not sure whether the lens is moving or still, you should use the program to automatically expose it, and the camera will automatically recognize it, such as when taking a snapshot.

Divide the picture into nine areas with two vertical lines. When shooting, you can put the subject on two vertical lines for composition, and the best composition position is the four intersections of horizontal lines and vertical lines. Triangular composition is a very useful composition method. Camera shooting mode Automatic mode: The camera controls all parameters.

When you are in front of the beach, snow, sunny day or white background, you should increase the exposure and use the flash, otherwise the subject will be very dark.

6. The use of light Photography is the artistic product of light and shadow, and it is not an exaggeration to call light the soul of photography. To take good photos, you have to master the key element of light.

Five film shooting techniques

Aerial photography: a method of shooting scenes with aircraft, such as movies and television. Underwater photography: a photography method in which cameras and people are immersed in water to shoot. Infrared photography: a photography method using infrared light as light source and infrared film.

Tripod, an indispensable weapon for photographers, is bulky when the camera is put on the shelf. In fact, for professional film and television people, although it is not convenient to move, at least the success rate of each group of lenses is guaranteed. Shooting stabilizer is an auxiliary shooting equipment introduced in recent years.

Panning is a shooting technique in shooting video, which refers to the shooting method of changing the optical lens axis of the camera with the help of the movable chassis on the tripod or the photographer himself as the fulcrum when the camera position is fixed.

Far-near switching transition Far-near switching transition is a transition mode in which the previous shot is close-up or close-up, the latter shot is distant or panoramic, from far and near, and from local to panoramic.

How to create a contrast between light and shade

1. The method to determine the contrast is to compare the light on one side of the main light (i.e. main light plus auxiliary light) with the light on the other side of the shadow (i.e. main light plus auxiliary light: only auxiliary light). If the reading of main light plus auxiliary light is 120FC, and the reading of single auxiliary light is 60FC, then the contrast is 120.

2. Creating a contrast between light and dark It is the most common in black and white photos to create a contrast between light and dark. Because black and white photos lack color rendering, light and shadow set off the whole picture. If there is obvious contrast between light and dark in the scene you shot, you can consider turning the photo into black and white after taking pictures.

3, using telephoto cropping When we need to highlight the subject, one of the most effective methods is to "subtract" the picture. Using telephoto lens to cut the picture and filter out unnecessary environmental background is a common means to highlight the main body of the picture. Contrast photography is the art of light, and light is one of the most basic photographic elements.

4. Select the logo layer, create a new layer, and use the brush tool to set the foreground color to black to minimize the hardness and the transparency to 10%. Gently apply it to the upper left corner of the standard, the more natural the better, and don't have a stiff border. Load the selection of the logo layer (hold down the ctrl key and click the red logo thumbnail).