Color Bars is the most used Test Pattern known for more than 50 years. It can be used in classic full screen variant and it is also an important component of many other tests.
Continue reading “Color Bars Test Pattern”Color Bars Reference Levels
Color Bars is the most used Test Pattern.
At first it was defined in analog RGB signal format, then in analog composite NTSC/PAL/SECAM formats, then in analog component format (YPbPr aka YUV), and finally – in digital component RGB and YUV formats.
In accordance with ITU-R Recommendation BT.471 the nomenclature (type specification) of any color bars test pattern should consist of RGB levels as a percentage of Reference White in the following sequence:
White Bar / Black Bar / Max Colored Bars / Min Colored Bars.
For 100/0/75/0 “EBU Bars” the MathCAD RGB_Bars matrix in percents looks like this:
Continue reading “Color Bars Reference Levels”