| 摘要 |
An apparatus for controlling the quality of a picture which is to be processed in a reproduction process, comprising a carrier and at least one measurement element applied to the carrier, said measurement element possessing at least one measurement symbol, the surface area of which is in a predetermined relationship with regard to the total surface area of the measurement element, and wherein the measurement symbol is subdivided into at least two non-contiguous parts or components or has a ring-shaped configuration. There is also disclosed a method of producing such apparatus wherein the measurement symbol is recorded in an enlarged scale and thereafter photographically reduced in size to the desired size.
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