以前有文章介绍可用网站工具来测量实物长度,但遗憾的是还需要一个标准的实物来校正电脑屏幕尺子,而在校正过程中不可避免地会产生误差,这个误差与校正人本身的操作有很大关系,即使号称史上最准确的屏幕尺子,实际效果也不会太好。 Previous article describes the available site tools to measure the physical length, but unfortunately also need a standard physical to correct the computer screen ruler, and in the correction process will inevitably produce errors, the error and correction of the operation of the person itself The big relationship, even if known as the history of the most accurate screen ruler, the actual effect will not be too good.