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해당 포스팅은 자율주행 Sensor 와 Sensor/Data Fusion 간의 Logical Interface 에 관한 표준인 ISO 23150 에서 정의된 용어 중 Measurement 에 관한 내용을 정리합니다.
| Term | Description |
| measurement | measuring and processing result of a measurement cycle |
| measurement cycle |
time period from the start of a data acquisition event to the start of the next data acquisition event Note 1 to entry: A measurement cycle of one sensor is a consistent view of an observed scene and not overlapping in time. |
| accuracy | closeness of agreement between a measured quantity value and a true quantity value Note 1 to entry: The concept accuracy is not a quantity and is not given a numerical quantity value. A measurement is said to be more accurate when it offers a smaller error. Note 2 to entry: The term accuracy should not be used for trueness and the term precision should not be used for accuracy, which, however, is related to both these concepts. Note 3 to entry: Accuracy is sometimes understood as closeness of agreement between measured quantity values that are being attributed to the measurand. |
| trueness | closeness of agreement between the average of an infinite number of replicated measured quantity values and a reference quantity value Note 1 to entry: Trueness is not a quantity and thus cannot be expressed numerically, but measures for closeness of agreement are given in the ISO 5725 series. Note 2 to entry: Truness is inversely related to systematic error, but is not related to random error. Note 3 to entry: The term accuracy should not be used for trueness. |
| precision | closeness of agreement between indications or measured quantity values obtained by replicate measurements on the same or similar measurands under specified conditions Note 1 to entry: Precision is usually expressed numerically by measures of imprecision, such as standard deviation, variance, or coefficient of variation under the specified conditions of measurement. Note 2 to entry: The specified conditions can be, for exmaple, repeatability conditions of measurement, intermediate precision conditions of measurement, or reproducibility conditions of measurement. Note 3 to entry: Precision is used to define measurement repeatability, intermediate measurement precision and measurement reproducibility. Note 4 to entry: Sometimes precision is erroneously used to mean accuracy. Note 5 to entry: Precision is inversely related to random error, but is not related to systematic error. |
| error | measured quantity value minus a reference quantity value Note 1 to entry: The concept of error can be used both Note 2 to entry: a) when there is a single reference quantity value to refer to, which occurs if a calibration is made by means of a measurement standard with a measured quantity value having negligible measurement uncertainty or if a conventional quantity value is given, in which case the error known Note 3 to entry: b) if a measurand is supposed to be represented by a unique true quantity value or a set of true quantity values of negligible range, in which case the error is not known. Note 4 to entry: Error should not be confused with production error or mistake. |
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