What is the principle behind the significant effect of beauty device lenses?

The principle of a filter is:

Beauty device lenses are made of plastic or glass with special dyes added, and the red filter can only allow red light to pass through, and so on. The refractive index of glass sheets was originally similar to that of air, allowing all colors of light to pass through, making them transparent. However, after dyeing, the molecular structure changes and the refractive index also changes, resulting in changes in the passage of certain colors of light. For example, a beam of white light passing through a blue filter emits a beam of blue light, while green light and red light are very rare and mostly absorbed by the filter.

The filter plays a significant role and is widely used in the photography industry. Why is the main scene always so prominent in some landscape paintings taken by photography masters? Is this how it is achieved? This requires the use of a filter. For example, if you want to take a picture of a yellow flower with a blue sky and green leaves as the background using a camera, it cannot stand out if taken as usual; Huanghua” This theme is not prominent enough due to the image of yellow flowers. However, if a yellow filter is placed in front of the lens to block a portion of the Li Zhong light emitted by green leaves, the blue light emitted by blue sky, and a large amount of yellow light emitted by yellow flowers passing through, the yellow flowers will appear very obvious and highlight; Huanghua” This theme.