Chroma and luma keying – post correction

To enable this function click on the Post Correction icon. This function allows you to adjust the object (a talent) to the lighting conditions of the virtual background. The post-correction, carried out with the sliders, will only concern the object (a talent) and so it will have no effect on the virtual background.

• Icon: Enabled – check this box to enable or disable the Post Correction.
• Slider: Brightness – this is a feature that allows you to bring additional brightness of the color into the talent’s image.
• Slider: Contrast – this feature allows you to increase contrast between colors.
• Slider: Saturation – this is a feature that allows you to increase color saturation.
• Color box: Ambient Color – this feature enables bringing the scene (ambient) color component into the talent’s image.
• Slider: Intensity – this is a feature that allows you to set the intensity of the ambient color.

The Post Correction functions are used to adjust the object (a talent – a figure of a presenter) to the background. This is possible by incorporating an additional component of a color already dominant in the virtual image. For example, when a background of a sunny beach is put under the discussed above object (talent) in the studio, you should add a yellow color (dominant color of sand and sun that affect the object) as Ambient Color. When you click on the Ambient Color icon, a color wheel window, where you select the exact color and hue, will open.

The color wheel shown in the picture above is based on RGB (Red, Green, Blue) model extended by Hue, Saturation, and Value.

The color can be set with the sliders available on the right side of the screen:

• Hue – the hue parameter corresponding to the colors on the edge of the color wheel – from 0 (red), through 120 (green) and 240 (blue) to 360 (red), – by changing the value of the slider, you change the position of
  the dash marker on the wheel.
• Saturation – the value of saturation parameter lays in a range of 0 (white) to 255 (100% full saturation), by moving the slider, you change the position of the black circle along one of the sides of the square.
• Value – the brightness parameter that lays in the in the range of 0 (black) to 255 (100% bright color of a given hue and saturation), by moving the slider, you change the position of the circle along one of the
  sides of the square.

You can also set all of these values with a cursor. You just need to hook the cursor on the dash marker. Changing the marker’s position on the wheel allows you to set the color by setting its Hue parameter. When you hook the cursor on the black circle, you can move this circle inside the square. This allows you to change all the remaining parameters. The current color will be visible in the middle of the black circle.

You can adjust the object to the conditions in the scene by setting the options of correction functions with the sliders. The figure of a talent will then gain a natural appearance.

After setting the key in this mode, you can save all of your settings to a file on your hard drive by clicking on the icon: Save in the lower right corner of the window.

The Reckeen 3D Studio system has its own key files – *.recKey . If the lighting conditions, hardware, etc. in the studio remain unchanged, then going back to the production screen, you can load your key’s settings from a file by clicking on the icon: Load.