From bfe4c68e8afb06ae4cf477309d0046f00f79ca6c Mon Sep 17 00:00:00 2001
From: Naimul Hassan <36055105+NaimulHassan@users.noreply.github.com>
Date: Thu, 9 May 2019 05:58:02 +0600
Subject: [PATCH] Metadata Extraction

---
 metadataExtraction.m | 72 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 metadataExtraction.m

diff --git a/metadataExtraction.m b/metadataExtraction.m
new file mode 100644
index 0000000..82f56c2
--- /dev/null
+++ b/metadataExtraction.m
@@ -0,0 +1,72 @@
+function [age_crop, gender_crop, dominant_hand_crop, medium_crop, division_crop]= metadataExtraction(scanned_img, refPath)
+
+%% Load Scanned Image
+img=imread(scanned_img);
+
+%% OCR detect formID
+roi = [2100 1 450 500];
+dilate = 5; 
+ocrResults = ocrForm(img,roi,dilate,false); % display true
+formID = ocrResults.Words{1};
+formID = strip(formID);
+if ~formID
+    formID= '8';
+end
+
+%% Load Template and Align
+imRef = imread([refPath '\' 'form_' formID '.jpg']);
+[rec,qual] = surfAlignGPU(imRef,img,true,false); % Nonrigid, disp
+figure
+imshowpair(imRef,rec);
+
+%% Crop Scanned image for the metadata portion with suitable ROI
+img=imcrop(rec,[115 185 1900-115 540-185]);
+figure
+imshow(img)
+
+%% Crop metadataRef with Same ROI
+metadata = imread([refPath '\metadataRef.png']);
+metadata=imcrop(metadata,[115 185 1900-115 540-185]);
+figure
+imshow(metadata)
+
+%% Centroids and Bounding Boxes for the OMR options
+omr = ~imbinarize(rgb2gray(img));
+omr = bwareaopen(omr,800);
+CC = bwconncomp(omr);
+L = labelmatrix(CC);
+s = regionprops(CC,'Extent');
+omr = ismember(L, find([s.Extent] >= .7));
+s = regionprops(omr,'Centroid', 'BoundingBox');
+centroids = cat(1, s.Centroid);
+s = struct2cell(s);
+s= s';
+figure
+imshow(omr)
+hold(imgca,'on')
+plot(imgca,centroids(:,1), centroids(:,2), 'r*')
+hold(imgca,'off')
+
+%% Extract
+age= s{1,2};
+gender= s{2,2};
+dominant_hand= s{3,2};
+medium= s{4,2};
+division= s{5,2};
+
+age_crop=imcrop(img,[age(1)+50 age(2) 105 45]);
+gender_crop=imcrop(img,[gender(1)+50 gender(2) 105 45]);
+dominant_hand_crop=imcrop(img,[dominant_hand(1)+50 dominant_hand(2) 105 45]);
+medium_crop=imcrop(img,[medium(1)+50 medium(2) 105 45]);
+division_crop=imcrop(img,[division(1)+50 division(2) 105 45]);
+
+figure
+imshow(age_crop)
+figure
+imshow(gender_crop)
+figure
+imshow(dominant_hand_crop)
+figure
+imshow(medium_crop)
+figure
+imshow(division_crop)