Length Estimator

Load Picture...
Data
Levels of gray
Box size
Line thickness

Observed object is

Estimation
Error distribution
Error standard deviation
Confidence level

Testing
H0 value
Unit
Alternative

× Welcome! Click on Load picture (must be JPEG format), choose start and end points, set data parameters and click on Prepare data. After that, you can perform length evaluation and hypothesis testing.
Please use proportional screen resolution, e.g. 1920x1080 if you use display with 16:9 aspect ratio, or 1920x1200 in the case of 16:10 aspect ratio display.
Start point: x
End point: x
Status: waiting...