Différences

Ci-dessous, les différences entre deux révisions de la page.

--- recherche:methodes:ebsd:ebsd_depth_map [23/10/2020 18:10] – simon.breumier
+++ recherche:methodes:ebsd:ebsd_depth_map [27/10/2020 09:29] (Version actuelle) – simon.breumier
@@ Ligne 1: / Ligne 1: @@
 === Compute the depth of each point of a sample relative to its surface whatever its geometry ===
-<Code:matlab linenums:5>
+The following script computes the ditance field between every point inside a *mask* and a *frontiere curve*:
-+1
+<Code:matlab>
+function [ebsdAct] = add_dep_comp(ebsd, front_pic, mask_pic)
+    %Load and adapt
+    front = imread(front_pic);
+    masking = imread(mask_pic);
+    masking = flipdim(masking,2);
+    front = flipdim(front,2);
+    I_max = min([size(front,1), size(masking,1), size(ebsd,1)]);
+    J_max = min([size(front,2), size(masking,2), size(ebsd,2)]);
+    I_min = size(ebsd,1) - I_max+1;
+    ebsd = ebsd(I_min:size(ebsd,1), 1:J_max);
+    front = front(1:I_max, 1:J_max,:);
+    masking = masking(1:I_max, 1:J_max,:);
+    % cut frontier
+    hsvValues = rgb2hsv(front);
+    hueValue = hsvValues(:,:,1);
+    ebsd.prop.hue = hueValue;
+    ebsdFront = ebsd(ebsd.hue>0.);
+    % mask
+    hsvValues2 = rgb2hsv(masking);
+    hueValue2 = hsvValues2(:,:,1);
+    ebsd.prop.mask = hueValue2;
+    ebsdAct = ebsd(ebsd.mask>0.);
+    % Get distance with frontiere
+    distTabAct = 10000*ones(ebsdAct.size);
+    for i=1:ebsdFront.size(1)
+       disp(strcat(string(i),"/",string(ebsdFront.size(1))))
+       distTabAct = min(distTabAct,sqrt((ebsdFront.x(i)-ebsdAct.x).^2 + (ebsdFront.y(i)-ebsdAct.y).^2));
+    end
+    ebsdAct.prop.dep = distTabAct;
+end
 </Code>
+The script takes three arguments:
+  * ebsd: the MTEX ebsd map object to put the distance field in. Note that the field dimensions should be the same than the picture resolution.
+  * front_pic: A picture where everything is black and white except the frontiere line.
+  * mask_pic: A picture where everything is black and white except the sample points used to compute the distance.
+Here are two examples of picture that worked for me (left: frontiere, right: mask):
+{{:recherche:methodes:ebsd:x4_frontiere.png?400|}}
+{{:recherche:methodes:ebsd:x4_inside.png?400|}}