Sony XVS-7000 Users Guide - Page 113

>Matte Adjust menu (1112.1), allowing you to adjust the pattern. For details, see "Matte color mixing for key edge fill" (page 118). 6 When adjusting color 1 and 2, select [Color 1] and [Color 2], respectively, then adjust the following parameters. No. Parameter Adjustment 1 Luminance Luminance 2 Saturation Saturation 3 Hue Hue 7 To interchange color 1 and color 2, press the [Color Invert] button, turning it on. Chroma Key Composition and Settings A key signal based on a particular color is used to cut out the background, and the key fill is then inserted. The inserted signal is also referred to as the foreground, and the composite image is called a chroma key image. Foreground Background Chroma key image In creating a chroma key image, either a normal mix or an additive mix can be used. Normal mix The foreground is cut out with the key signal, and then combined with the background, which has also been cut out with the key signal. Additive mix The background, which has been cut out with the key signal, is combined with the unshaped foreground. This is effective for a natural-looking composite when the scene includes glass or other translucent objects. The following functions are also used in additive mixing. Plane function In an additive mix, the foreground is not shaped by the key signal, and variations in the (blue) background appear in the composite image. To avoid this, a particular luminance level can be set for the (blue) background, and regions of lower luminance forcibly cut. Color cancel function In an additive mix, the (blue) background parts of the foreground video must be converted to black using the color cancel function (see page 115). Composing an image by chroma keying 1 Open the M/E-1 >Key1 >Type menu (1111). 2 In the group, select [Chroma]. You can now adjust the key density (see page 110). 3 Press [Chroma Adjust]. The Chroma Adjust menu (1111.1) appears. 4 Execute auto chroma key. Make manual adjustments as necessary to obtain an optimum chroma key image (see page 114). 5 In the group, select the chroma key composition method. Normal Mix: Compose using a normal mix. Additive Mix: Compose using an additive mix. Using the plane function 1 In the M/E-1 >Key1 >Type >Chroma Adjust menu (1111.1), press [Plane], turning it on. 2 Set the following parameter. No. Parameter Adjustment 1 Luminance Luminance level 113