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Posted on 07/10/09 8:26:42 PM |
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jwhite
Collage Critter Posts: 274 Reply  |
CS4 Extended - Measurement tool
I can't seem to figure out how to measure down the mid-line of this snake to get a total length. It looks as if the ruler tool will only allow one to measure from point A to point B and won't allow multiple points to measure the total length of curved surfaces. Is this correct or am I missing something? Thanks! John |
Posted on 14/11/09 02:04:07 AM |
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tank172
ThreeDee Thriller Posts: 692 Reply  |
Re: CS4 Extended - Measurement tool
Hi John, the first thing that came to mind is this: Use the pen tool to create a curved line down the snake's spine. Add a 2 px stroke around the path and keep the selection active. With the selection active, choose Analysis --> Record Measurements. You should see the "Perimeter" measurement, which is measuring the distance around the entire stroke. Take that number and divide by 2. The resulting number should be the approximate length of your original, curved path. 
If you need more accuracy, you'll also need to measure the width of the stroke and subtract. If you plan to do several of these measurements, you can always employ the use of an Action. And run the action after creating the intended path with the Pen Tool. My math may be completely wrong, though... 
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Posted on 14/11/09 08:31:37 AM |
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maiden
Golden Gif Gagster Posts: 471 Reply  |
Re: CS4 Extended - Measurement tool
I'm not sure what measurement you want jwhite but I used tank172's method and used the Pen Tool to draw a curved line down the middle of the snake's length and stroked the path in a new layer with a 1px brush set to 100 hardness. I then loaded this stroked line as a selection [Ctrl]+ LMB on the Layer's icon in the Layer Palette and used the Analysis --> Record Measurements and opened the Measurement Log and checked the Perimeter Column for the figure 3448.492424 pixels Divide this figure by 2 to get the length 1724.246212 pixels Then I checked the Image Size of the document and found that the Resolution: is 96.012 pixels/inch or 37.8 pixels/cm. so I divided that figure from the length figure 1724.246212 / 96.012 = 17.96 inches. 1724.246212 /37.8 = 45.64 cm. so Tank was right if these figures can be validated. Becky *Edit revised the maths as I had copied and pasted the image into Photoshop the actual image is 200 pixels/inch so therefore 1724.246212 / 200 = 8.62 inches 1724.246212 / 78.74 = 21.9 cm |
Posted on 14/11/09 12:23:50 PM |
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jwhite
Collage Critter Posts: 274 Reply |
Re: CS4 Extended - Measurement tool
Tank & Becky, Thank you! You guys are awesome! John |
Posted on 16/11/09 07:40:49 AM |
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Steve Caplin
Administrator Posts: 7072 Reply  |
Re: CS4 Extended - Measurement tool
Indeed. Very clever solutions. |