Why do my photos always reflect light?

It is possible to solve the reflection problem with a polarizer.

Generally, when white light shines on an ordinary object, the surface of the object will absorb some colored light and reflect the other part, so that human eyes can know the inherent color of the object from the reflected colored light. However, when high-intensity white light (such as outdoor sunlight) shines on the surface of a smooth object, the object will not only reflect a part of colored light that reflects the inherent color of the object, but also directly reflect a considerable part of all colored light emitted by the light source without being absorbed (if the light source is sunlight, this part will be reflected as white light without any color). In the highlight part of a smooth object, the intensity of the latter reflection is much greater than the former, which makes the highlight part of the object form bright spots and flares, weakens the color tone of the object itself, and makes it appear as a light source color, thus significantly reducing the color saturation of the object there. For example, in the sun, the highlight of the roof reflects strong white light, which often makes this part of the body color unsaturated. Another example is the wet grass with dew and water drops, and the green color often looks pale. On sunny days, some green leaves and grass areas will reflect a lot of blue light, showing a tendency of light blue and cool colors.

When the brightness of the bright spots on the surface of an object is too high (too dazzling), the area is too large, the position is not good, or there are too many flares, it will often have a bad influence on the hue and color of the whole picture, which will damage the level, detail, texture, clarity and color reproduction of the bright spots and flares to a certain extent, which will easily interfere with the audience's line of sight.

In many occasions in real life, at the bright spots and flares on the surface of non-metallic objects, the reflected light that can present the inherent color of the object is natural light (i.e. unpolarized light), while the strongly reflected light that presents the color of the light source is polarized by the surface of the object-turned into polarized light. Obviously, at this time, the bright spots and flares formed by these polarized lights can be easily eliminated by using polarizers, and the inherent hue and tone of the place can be truly recorded and its texture can be reproduced.

For example, when photographing glassware, porcelain, painted objects (such as painted surfaces of furniture and automobiles), waxed floors and plastics, with thin waxy green leaves and fruits growing on the surfaces, and landscapes with large areas of water (such as sea surface and lake surface), and when remaking artistic works and photographic works (such as photos and oil paintings) and materials, photographers often use polarizers and adjust their directions appropriately to

For example, some green leaves and fruits will reflect a lot of blue sky light on sunny days and make it linearly polarized. Therefore, using a polarizer and properly adjusting its orientation can obviously weaken the blue polarized light reflected by such green leaves, green grass and fruits, thus correcting the tendency of light blue and cool tones caused by reflection and making the colors such as green more saturated.

In a word, the polarizer can obviously weaken or even eliminate the smooth surface of some opaque non-metallic objects, as well as the strong bright spots and flares on the surface of transparent objects and other harmful reflections with excessive brightness. Therefore, the polarizer can not only significantly improve the image clarity of such bright spots, but also truly show the inherent color of objects covered, blocked and diluted by highlights at such bright spots, and significantly improve the color saturation of their images. Therefore, the photographed images have rich layers, clear details, distinct textures, delicate shadows, harmonious colors, strong texture, bright, rich, magnificent, rich and pleasing to the eye.