Format distance tool label to centimeter.

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Muong
Muong 2011-11-10
Can anyone tell me how to format the text in distance tool's label to centimeter?
Thanks
  2 个评论
Sven
Sven 2011-11-12
The distance tool reports in pixels for a very good reason:
An image doesn't have *physical* distance by itself. Real-world distance is only applied after you answer this question:
"How big (in cm, for example) is each pixel in my image"?
This answer will be very different depending on the image. Take a picture of your house. How many cm in each pixel? Take a satellite picture of your neighbourhood. How many cm in each pixel?
What I suggest you do is determine the "scale" of your pixels, ie, that each pixel represents 0.1cm, then multiply that number by what the distance tool reports.
Jan
Jan 2011-11-13
If this is posted as an asnwer, I'd vote for it.

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回答（1 个）

Ashish Uthama
Ashish Uthama 2012-9-17
" The distance tool reports in pixels for a very good reason:
An image doesn't have physical distance by itself. Real-world distance is only applied after you answer this question:
"How big (in cm, for example) is each pixel in my image"?
This answer will be very different depending on the image. Take a picture of your house. How many cm in each pixel? Take a satellite picture of your neighbourhood. How many cm in each pixel?
What I suggest you do is determine the "scale" of your pixels, ie, that each pixel represents 0.1cm, then multiply that number by what the distance tool reports. "

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