c# - AForge ShapeCheker.IsCircle method -

-

well i'm using simpleshapechecker.iscircle method detect pupil. work fine, when sides pupil turns oval/ellipse shape. there method detect ovals?, or there way "relax" iscircle() method?

thanks

unfurtunately in aforge there not isoval() function.

but can take @ source code of shape checker!

https://code.google.com/p/aforge/source/browse/trunk/sources/math/geometry/simpleshapechecker.cs?r=1402

you can see iscircle() function , modify see if oval or not.

this function:

public bool iscircle( list<intpoint> edgepoints, out point center, out float radius )         {             // make sure have @ least 8 points curcle shape             if ( edgepoints.count < 8 )             {                 center = new point( 0, 0 );                 radius = 0;                 return false;             }              // bounding rectangle of points list             intpoint minxy, maxxy;             pointscloud.getboundingrectangle( edgepoints, out minxy, out maxxy );             // cloud's size             intpoint cloudsize = maxxy - minxy;             // calculate center point             center = minxy + (point) cloudsize / 2;              radius = ( (float) cloudsize.x + cloudsize.y ) / 4;              // calculate mean distance between provided edge points , estimated circle’s edge             float meandistance = 0;              ( int = 0, n = edgepoints.count; < n; i++ )             {                 meandistance += (float) math.abs( center.distanceto( edgepoints[i] ) - radius );             }             meandistance /= edgepoints.count;              float maxditance = math.max( minacceptabledistortion,                 ( (float) cloudsize.x + cloudsize.y ) / 2 * relativedistortionlimit );              return ( meandistance <= maxditance );         }

maybe if play minacceptabledistortion variable, can detect ovals too!

hope helped.


Comments

Post a Comment

Popular posts from this blog

Perl - how to grep a block of text from a file -

-
it can in xml or text format. how in general grep block of text in perl? <track type="ws"> <range> <rangestart>0</rangestart> <rangeend>146.912</rangeend> <locationindex>0</locationindex> <propertyindex>0</propertyindex> </range> </track> <track type="ps" id="1"> <range> <rangestart>0</rangestart> <rangeend>146.912</rangeend> <locationindex>1</locationindex> <propertyindex>1</propertyindex> </range> </track> i want grep type="ps" , till </range> . one solution open file, read line line , match block. open(fh, "file.txt"); foreach $line (<fh>) { if ($line =~ m/type="cc"(.*?)<\/range>/) { print $1; } } but there more optimal solution without reading file line l
Read more

delphi - How to remove all the grips on a coolbar if I have several coolbands? -

-
Image
if set mycoolbar.fixedorder true,only grip on first band hidden. well,if use delphi 7 create vcl forms application,then put coolbar on , create 3 coolbans hold other controls,only grip , top coolbands can hidden setting mycoolbar.fixedorder:=true. i've uploaded picture make things clear. you got fixedorder property wrong. fixed property not allow bands rearranged if set true . setting property of coolbar true keep user changing bands order @ runtime, user can still move , resize bands. can give advice can do, actual solution problem, well, have wait answer. my advice use 3 coolbars in row , setting "fixedorder" property true , bandborderstyle bsnone . way grip hidden on of them. about property, it's not bug of ide, actual preference of property.
Read more

javascript - Animating array of divs; only the final element is modified -

-
this baffling me @ moment. i'm experienced programmer looking throw bit of surprise fiancee on countdown page our wedding. desired effect simulated confetti falling behind main page. setup follows: i have array of divs in javascript. each div absolutely positioned on page. have interval set updates every 50 or milliseconds. on each tick, run loop on array of divs, , calculations , update positions. problem problem having, however, though can see divs created, stored array, , modified (in case, each has slight randomized rotation) during initialization phase, once tick update position starts, div stored in whatever last slot of array gets position updated. tried hard-coding each div index testing purposes, strictly last element update position. upon printing current "left" , "top" style values each div before , after calculations shows value has been changed, no visible change noticeable. here's basic code: javascript var container;
Read more