HELP this problem .. how to FIND Lenght pixel of line on edge image.

help me to solve this problem, i need m-file coding to solve this : <http://tinypic.com/view.php?pic=14160aq&s=6>

this my link picture :

<http://tinypic.com/view.php?pic=2czer0o&s=6>

<http://tinypic.com/view.php?pic=2i74z2t&s=6>

Answer 1

[Walter Roberson]

The square of the length of the hypotenuse of a triangle is equal to the sum of the squares of the other two sides.

[KURNIAWAN]

but how ? how implentation in coding m-file

[Walter Roberson]

linelen = sqrt((x2-x1).^2 + (y2-y1).^2);

[KURNIAWAN]

use koordinaat? can give the specify mr, roberson?

[Ryan]

He's telling you to use the height of "triangle" and width of the "triangle" formed between the square box shown (size of the matrix) and the tile edge to find the length of the tile's edge using geometry

[Walter Roberson]

I do not understand your question?

[KURNIAWAN]

what if do not use the triangle method, by measuring the direct line?? im newbie use matlab, i need m-coding for more understand,, or any turial tu measure the line... help pls