Finding
in [Matlab]
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From: Archana Ananthanarayan on 21 Apr 2008 00:40 Just to bring this thread up!! If someone knows the answer pls reply!!
From: Roger Stafford on 21 Apr 2008 01:05 "Archana Ananthanarayan" <archana1985_ms(a)hotmail.com> wrote in message <fuftoi$qut$1(a)fred.mathworks.com>... > I've a problem with the implementation of the following > problem : > > Consider an image of size m x n. Now, we bifurcate the image > into two parts column wise( vertically). the X co-ordinates > of all the rows are same. Now from each row we need to draw > lines from different angles. say from 0 to 15 degrees. But, > to do this we need to find y co-ordinate at that position. > how to achieve this? is any concept from calculus or > geometry helful? ------------- You will have much better luck getting answers if you explain your request far more extensively. As it stands I can't understand what you are asking. Try giving a concrete example of what you are trying to accomplish. Roger Stafford
From: Archana Ananthanarayan on 21 Apr 2008 08:10 Ok, Here i Go: I've a scanned document image. I partition the image into two slabs vertically. Now, in each slab, I've to draw horizontal scan lines. I've to consider each row and draw the lines. But the data i will have will be just the angle thetha and the X co-ordinate. How do i find the y co-ordinate? Do respond with your ideas! Thanks! "Roger Stafford" <ellieandrogerxyzzy(a)mindspring.com.invalid> wrote in message <fuh79v$fap$1(a)fred.mathworks.com>... > "Archana Ananthanarayan" <archana1985_ms(a)hotmail.com> wrote in message > <fuftoi$qut$1(a)fred.mathworks.com>... > > I've a problem with the implementation of the following > > problem : > > > > Consider an image of size m x n. Now, we bifurcate the image > > into two parts column wise( vertically). the X co-ordinates > > of all the rows are same. Now from each row we need to draw > > lines from different angles. say from 0 to 15 degrees. But, > > to do this we need to find y co-ordinate at that position. > > how to achieve this? is any concept from calculus or > > geometry helful? > ------------- > You will have much better luck getting answers if you explain your request far > more extensively. As it stands I can't understand what you are asking. Try > giving a concrete example of what you are trying to accomplish. > > Roger Stafford >
From: Roger Stafford on 21 Apr 2008 11:55 "Archana Ananthanarayan" <archana1985_ms(a)hotmail.com> wrote in message <fui06s$5bb$1(a)fred.mathworks.com>... > Ok, Here i Go: > > I've a scanned document image. I partition the image into > two slabs vertically. Now, in each slab, I've to draw > horizontal scan lines. I've to consider each row and draw > the lines. But the data i will have will be just the angle > thetha and the X co-ordinate. How do i find the y co-ordinate? > > Do respond with your ideas! Thanks! ---------- You still haven't expressed yourself clearly, in my opinion, Archana. What do the "slabs" have to do with the "lines", the "data", and the "coordinates"? Coordinates of what points? Where? In what relation to one another? I'll try to make a guess as to your problem, but mind you it is a wild guess. If you have a line drawn from the coordinate origin (0,0) to a point with coordinates (x,y) and you know only x and the angle, theta, the line makes with the x-axis, then you can determine y as y = x*tan(theta). However, that is such a trivial identity of elementary trigonometry, I doubt that is what you are asking. Try again to explain what it is you really want to know. Try to imagine you were explaining the problem to some grade school children and were drawing the problem on a blackboard. What pictures would you draw? Then translate those pictures clearly into words for us. Our abilities to read minds is limited. Roger Stafford
From: Archana Ananthanarayan on 21 Apr 2008 22:16 http://www.iis.sinica.edu.tw/papers/fchang/2018-F.pdf Am trying to implement this paper as a part of my project! Can you infer anything? "Roger Stafford" <ellieandrogerxyzzy(a)mindspring.com.invalid> wrote in message <fuidcn$pm7$1(a)fred.mathworks.com>... > "Archana Ananthanarayan" <archana1985_ms(a)hotmail.com> wrote in > message <fui06s$5bb$1(a)fred.mathworks.com>... > > Ok, Here i Go: > > > > I've a scanned document image. I partition the image into > > two slabs vertically. Now, in each slab, I've to draw > > horizontal scan lines. I've to consider each row and draw > > the lines. But the data i will have will be just the angle > > thetha and the X co-ordinate. How do i find the y co-ordinate? > > > > Do respond with your ideas! Thanks! > ---------- > You still haven't expressed yourself clearly, in my opinion, Archana. What > do the "slabs" have to do with the "lines", the "data", and the "coordinates"? > Coordinates of what points? Where? In what relation to one another? > > I'll try to make a guess as to your problem, but mind you it is a wild guess. > If you have a line drawn from the coordinate origin (0,0) to a point with > coordinates (x,y) and you know only x and the angle, theta, the line makes > with the x-axis, then you can determine y as y = x*tan(theta). > > However, that is such a trivial identity of elementary trigonometry, I doubt > that is what you are asking. Try again to explain what it is you really want to > know. Try to imagine you were explaining the problem to some grade school > children and were drawing the problem on a blackboard. What pictures > would you draw? Then translate those pictures clearly into words for us. Our > abilities to read minds is limited. > > Roger Stafford > >
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