COLOR ADJUSTMENT CIRCUIT

摘要

The fact that B is close to a U axis and R is close to a V axis is noted and an example of a color adjustment parameter following the direction of each color is shown. If V of input is in the range of negative, the influence degree of the B is found out to be small and thus the B component is omitted from computation in order to reduce the amount of the computation. Similarly, when a component having a small influence degree is omitted if the B is in the range of positive, U is in the range of positive, and the U is in the range of negative, adjustment parameters AR, AG, and AB of the directions shown in figure can be defined. If the V of the input is in the range of positive, the V component can be adjusted by multiplying the V of the input by the AR. When considering that the cases where the V of the input is in the range of negative, the U is in the range of positive, and the U is in the range of negative are similarly processed, a color transformation processing for adjusting the shading of color can be performed so as to bring the values of the UV close to the direction of a color component to be intensified independently of brightness by setting the value of each adjustment parameter of RGB larger than 1 or setting it smaller than 1. This makes it possible to alleviate the burden on the processing in the color transformation.