Measure length/distance on an image w/o calibrated bar

Measure Length/Distance on an Image w/o Calibrated Bar
- Python for Integrated Circuits -
- An Online Book -

Python for Integrated Circuits http://www.globalsino.com/ICs/

Chapter/Index: Introduction | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Appendix

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Measure length on an image w/a calibrated bar: Measure distance by mouse clicks, that is the first two clicks are for standards, and the last two clicks are for measurements. Code:
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Input:

Output:

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Measure pixel distance by mouse clicks: the first two clicks are obtained from the ends of a diagonal of the image, and the last two clicks are feature needed. Code:
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Input:

Output:

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