| T O P I C R E V I E W |
| Janex |
Posted - Nov 14 2014 : 00:17:44
Hi all.
I have picture with some very small objects, viruses, for example.
I know picture scale, 1:100000 for example.
Is there some way to programmatic set ruler to display
real size of measured object ?
WBR
Janex |
| 2 L A T E S T R E P L I E S (Newest First) |
| w2m |
Posted - Nov 16 2014 : 12:18:46
For objects see:
ScaleFactor, SetScaleFromPixels and SetScaleFromSelectionLen
Declaration
property ScaleFactor: double;
Description
ScaleFactor specifies the scale factor (default 1).
In the common representation X:Y (ex. 1:100000) is the Y value (100000).
This value, with DpiX and DpiY (and measure unit MUnit), weight the measurements of areas and line lengths.
Example
// Sets a scale factor of 1:100000
ImageEnVect1.ScaleFactor:=100000;
Declaration
procedure SetScaleFromPixels(px:integer; mm:double);
Description
SetScaleFromPixels changes the ScaleFactor property such that px pixels correspond to one mm (MUnit).
Example
// This code makes so that 100 pixels are equals to 1 meter.
ImageEnVect1.MUnit:=ieuMETERS;
ImageEnVect1.SetScaleFromPixels(100,1);
Declaration
procedure SetScaleFromSelectionLen(mm:double);
Description
SetScaleFromSelectionLen makes the perimeter of the selection region correspond to one mm (MUnit) by changing ScaleFactor property.
Example
// This computes scalefactor so that the length of the current selection measures 5 millimeters.
TImageEnVect1.MUnit := ieuMILLIMETERS;
TImageEnVect1.SetScaleFromSelectionLen(5);
Bill Miller
Adirondack Software & Graphics
Email: w2m@hughes.net
EBook: http://www.imageen.com/ebook/
Custom Commercial ImageEn Development |
| xequte |
Posted - Nov 15 2014 : 20:10:36
Hi Janex
Do you mean a ruler along the top/side of the image, or a ruler that the user can select the start and end of the object.
Nigel
Xequte Software
www.xequte.com
nigel@xequte.com
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