Changes between Version 3 and Version 4 of barSoftwareGapFillDetails

Timestamp:

07/25/11 12:13:36 (13 years ago)

Author:

pmajka

Comment:

--

barSoftwareGapFillDetails

@@ -4 +4 @@
 === Detailed description of gap-filling algorithm ===
 
-The most common defect encountered in digital versions of published PDF atlases are gaps in structures' outlines. It commonly happens when two contour lines which should touch are drawn so that they leave a little space in between. Such an arrangement may not be visible in a printed atlas but it greatly disturbs tracing process where every pixel may influence the results. In this case the structure being traced overtakes the space of its neighbour through the broken contour which we call leaking of the structure. 
+The most common defect encountered in digital (e.g. PDF) versions of published atlases are gaps in structures' outlines. It commonly happens when two contour lines which should touch are drawn so that they leave a little space in between. Such an arrangement may not be visible in a printed atlas but it greatly disturbs tracing process where every pixel may influence the results. In this case the structure being traced overtakes the space of its neighbour through the broken contour which we call leaking of the structure (see figure below).
 
 [[Image(debug_476_576_AOM_step_0.png)]]
+
+Fragment of rasterized contour slide based on Paxinos and Franklin ''The Mouse Brain In Stereotaxic Coordinates, third edition''.
 
 Leaking structures are handled in 3dBAR by gap filling algorithm, an extension of the basic tracing procedure. The algorithm requires single input parameter – `MaxGrowLevel` describing maximal size of the gaps that will be closed during tracing of a particular area. The algorithm creates multiple (`n=MaxGrowLevel`) copies of initial input bitmap, each with the contours expanded using the [http://en.wikipedia.org/wiki/Dilation_%28morphology%29 dilation filter]  approximately by one pixel.