yes. you can do it manully with limited accuracy, .

來源: coolwin 於 2013-02-02 18:54:26 [] [舊帖] [給我悄悄話] 閱讀數 : (297 bytes)

open the image with Paint or whatever an image editor.

Measure the distance the point you want measure to the grid line on the bottom, in pixel. Measure the distace between two grid lines, also in pixel. Then take the ratio and get the number you want.

 

 

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