Color replacement method base on HSV space

Abstract

The invention discloses a color replacement method base on an HSV space, which belongs to the technical filed of special effect processing and analysis of videos and images. The method comprises the following steps: firstly, converting a source color and a target color from an RGB space to the HSV space; then calculating the difference values delta H, delta S and delta V between the components H, S and V of the source color and the components H, S and V of the target color; then, converting the input images from the RGB space to the HSV space; respectively adding the delta H, the delta S and the delta V into the components H, S and V requiring color pixel replacement in the input images; and finally, converting the images after the color replacement from the HSV space to the RGB space. The invention realizes the replacement effect on the colors in a certain range in the images or the videos, and is particularly suitable for being used in high-quality and high-efficiency special effect treatment and analysis of videos or images.

Description

technical field [0001] The invention belongs to the technical field of special effect processing and synthesis of videos and images, and in particular relates to a color replacement method based on HSV space. The invention is especially suitable for high-quality, high-efficiency video or image special effect processing and synthesis. Background technique [0002] The RGB color mode is a color standard in the industry. It obtains a variety of colors by changing the three color channels of red (R), green (G), and blue (B) and superimposing them with each other. , RGB is the color that represents the three channels of red, green, and blue. This standard includes almost all the colors that human vision can perceive. It is one of the most widely used color systems at present. The RGB color mode uses the RGB model to assign an intensity value in the range of 0 to 255 to the RGB component of each pixel in the image. For example: the R value of pure red is 255, the G value is 0, a...

AI Technical Summary

Problems solved by technology

Although this method is simple and easy to implement, it is not practical, because under normal circumstances, it is necessary to replace all colors within a certain range, such as replacing the entire blue sky in the background. At this time, what is to be replaced is not a color, but is a large range of blue

It is more difficult to replace directly in the RGB space, because the RGB space is the space of the superposition coefficients of the three components of the three primary colors, which itself does not conform to the color perception characteristics of the human eye, so it is difficult to model in this space for color replacement

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