About accuracy accuracy and resolution resolution

About accuracy accuracy and resolution resolution, for example: a plastic ruler, the minimum scale is 1mm, take it to measure things, you can not read the number of 1mm below, then this 1mm is its (minimum) resolution, that is, the smallest discernible measure. If you already know the actual length of an object is 100mm, take this ruler to measure, the amount of data is 102mm, then the accuracy of this ruler is (102-100)/100=0.02, that is, the error between the measured result and the real value.
Another concept of precision precision, this refers to the same instrument each measurement of the degree of dispersion between the value of the comparison of the object is the data of each measurement. Also use the ruler above to do the measurement, or the last object, measured 5 times, the data is 108,109,107,107,108,108. The error between these data and the real value of 100mm is not small, but the gap between these data is very small, indicating that the precision is good.
Many people often mistake precision precision for accuracy, and some instrument manufacturers mislead users deliberately to use precision instead of precision. Generally speaking, the accuracy is the accuracy.

About accuracy accuracy and resolution resolution