KitPlus - The TV-Bay Magazine

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Histogram is a tool for checking overall brightness (luma) or colour level (chrominance) within an image. It displays how many pixels there are at each brightness or colour level. Like waveform, the histogram can have three modes— luma, RGB overlay, and RGB parade. It can be used to quickly determine whether the full dynamic range is being captured. In other words, most pixels should be distributed broadly around the centre of the horizontal axis. Too hard to the left, and the image is underexposed. Too hard to the right, and the image is overexposed. Vectorscope is a circular graphical tool for monitoring colour saturation and hues. It may be used to help make creative choices on overall look, eliminate unwanted colour casts (offsets), and check white/ black colour balance. It’s also a crucial tool for ensuring that colour saturation falls within a legal broadcast colour gamut. While modern HD televisions can handle the full tonal range (for 8-bit, RGB 0,0,0 to 255,255,255), there are still specifications for “broadcast safe colors” that remain in effect worldwide and limit the range to 16,16,16 (safe black) to 235,235,235 (safe white). On a monitor’s vectorscope, colour saturation is determined by the distance from the centre of the scope; the greater the saturation or more vivid a colour, the further its trace reach is from the centre. Colour hue is determined by the direction or angle of the trace. Small boxes represent target values for fully saturated REC 709 primary and secondary colors. There is also a line, between the red and yellow target boxes that indicates skin tone. With today’s fast-paced, ever-evolving industry, a high-quality monitor with scopes is crucial for any professional to have in their arsenal. Proper colour correction, with the application of the right scopes, can help to bring any video imagery to life. Kit Plus IBC - MStor - Relax - IBC 010816.indd 1 16/09/2016 16:18:07 KITPLUS - THE TV-BAY MAGAZINE: ISSUE 119 NOVEMBER 2016 | 49