Find out the lightness of color composition and compare it with Jiugongge.

The picture of the color composition brightness contrast nine squares is shown in the text map. Brightness contrast can be divided into simultaneous brightness contrast and successive brightness contrast. The former, like a gray object, appears darker on a white background and brighter on a black background; If the latter looks at a white object on a gray background for a while, and then removes the white object, a dark negative afterimage will appear when looking at the gray background, but a bright negative afterimage will appear when looking at the black object at this time.

The brightness of an object's surface is influenced by its different background brightness, which makes individuals feel different subjective brightness. Cut two small squares from the same gray paper and put them on a piece of black and white background paper. Individuals will feel that the brightness of small squares on white background paper becomes dark, while those on black background paper become bright. At the same time, the brightness contrast is particularly obvious near the boundary between the small square and the background.

Extended data:

The application of contrast brightness is Rembrandt's etching painting Dr. Foster.

In order to show the truth of events, latour often slides the light source into his paintings, achieving a mysterious realism effect. In contrast, the light of color master Rembrandt is more general.

Etching painting skills can create particularly fine shadow changes through different positions of lines, so there is a vivid and diverse color gamut. Although the light and shade of Rembrandt's etched paintings are multi-tonal, many tones are concentrated in two main levels.

From the opposite side of the shadow, Foster, who is exploring, clearly shows his thirst for knowledge from the contrast of the shadow. His insight into the mysteries of life is dramatically reflected in the tension between his figure and the light that appears outside the window.