From 3386e586ac0f0ae07535036efe6293f6118f7e2b Mon Sep 17 00:00:00 2001
From: jaseg <git@jaseg.de>
Date: Tue, 1 Jun 2021 23:36:32 +0200
Subject: Work on chain approx

---
 svg-flatten/src/nopencv_test.cpp | 52 +++++++++++++++++++++++++++++++++++-----
 1 file changed, 46 insertions(+), 6 deletions(-)

(limited to 'svg-flatten/src/nopencv_test.cpp')

diff --git a/svg-flatten/src/nopencv_test.cpp b/svg-flatten/src/nopencv_test.cpp
index 21710b9..901c7a8 100644
--- a/svg-flatten/src/nopencv_test.cpp
+++ b/svg-flatten/src/nopencv_test.cpp
@@ -40,7 +40,7 @@ MU_TEST(test_complex_example_from_paper) {
     };
     Image32 test_img(9, 6, static_cast<int*>(img_data));
 
-    const Polygon expected_polys[3] = {
+    const Polygon_i expected_polys[3] = {
         {
             {1,1}, {1,2}, {1,3}, {1,4}, {1,5},
             {2,5}, {3,5}, {4,5}, {5,5}, {6,5}, {7,5}, {8,5},
@@ -64,18 +64,18 @@ MU_TEST(test_complex_example_from_paper) {
     const ContourPolarity expected_polarities[3] = {CP_CONTOUR, CP_HOLE, CP_HOLE};
     
     int invocation_count = 0;
-    gerbolyze::nopencv::find_blobs(test_img, [&invocation_count, &expected_polarities, &expected_polys](Polygon poly, ContourPolarity pol) {
+    gerbolyze::nopencv::find_blobs(test_img, [&invocation_count, &expected_polarities, &expected_polys](Polygon_i &poly, ContourPolarity pol) {
             invocation_count += 1;
             mu_assert((invocation_count <= 3), "Too many contours returned"); 
 
             mu_assert(poly.size() > 0, "Empty contour returned");
             mu_assert_int_eq(pol, expected_polarities[invocation_count-1]);
 
-            d2p last;
+            i2p last;
             bool first = true;
-            Polygon exp = expected_polys[invocation_count-1];
+            Polygon_i exp = expected_polys[invocation_count-1];
             //cout << "poly: ";
-            for (d2p &p : poly) {
+            for (auto &p : poly) {
                 //cout << "(" << p[0] << ", " << p[1] << "), ";
                 if (!first) {
                     mu_assert((fabs(p[0] - last[0]) + fabs(p[1] - last[1]) == 1), "Subsequent contour points have distance other than one");
@@ -149,7 +149,7 @@ static void testdata_roundtrip(const char *fn) {
         << "xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">" << endl;
     svg << "<rect width=\"100%\" height=\"100%\" fill=\"black\"/>" << endl;
 
-    gerbolyze::nopencv::find_blobs(ref_img, [&svg](Polygon poly, ContourPolarity pol) {
+    gerbolyze::nopencv::find_blobs(ref_img, [&svg](Polygon_i &poly, ContourPolarity pol) {
         mu_assert(poly.size() > 0, "Empty contour returned");
         mu_assert(poly.size() > 2, "Contour has less than three points, no area");
         mu_assert(pol == CP_CONTOUR || pol == CP_HOLE, "Contour has invalid polarity");
@@ -212,7 +212,45 @@ MU_TEST(test_round_trip_two_px)             { testdata_roundtrip("testdata/two-p
 MU_TEST(test_round_trip_two_px_inv)         { testdata_roundtrip("testdata/two-px-inv.png"); }
 
 
+static void chain_approx_test(const char *fn) {
+    int x, y;
+    uint8_t *data = stbi_load(fn, &x, &y, nullptr, 1);
+    Image32 ref_img(x, y);
+    for (int cy=0; cy<y; cy++) {
+        for (int cx=0; cx<x; cx++) {
+            ref_img.at(cx, cy) = data[cy*x + cx] / 255;
+        }
+    }
+    stbi_image_free(data);
+
+    TempfileHack tmp_svg(".svg");
+
+    //ofstream svg(tmp_svg.c_str());
+    ofstream svg("/tmp/teh-chin-test.svg");
+
+    svg << "<svg width=\"" << x << "px\" height=\"" << y << "px\" viewBox=\"0 0 "
+        << x << " " << y << "\" "
+        << "xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">" << endl;
+    svg << "<rect width=\"100%\" height=\"100%\" fill=\"black\"/>" << endl;
+
+    gerbolyze::nopencv::find_blobs(ref_img, simplify_contours_teh_chin(2, [&svg](Polygon_i &poly, ContourPolarity pol) {
+        svg << "<path fill=\"" << ((pol == CP_HOLE) ? "black" : "white") << "\" d=\"";
+        svg << "M " << poly[0][0] << " " << poly[0][1];
+        for (size_t i=1; i<poly.size(); i++) {
+            svg << " L " << poly[i][0] << " " << poly[i][1];
+        }
+        svg << " Z\"/>" << endl;
+    }));
+    svg << "</svg>" << endl;
+    svg.close();
+}
+
+
+MU_TEST(chain_approx_test_chromosome)         { chain_approx_test("testdata/chain-approx-teh-chin-chromosome.png"); }
+
+
 MU_TEST_SUITE(nopencv_contours_suite) {
+    /*
     MU_RUN_TEST(test_complex_example_from_paper);
     MU_RUN_TEST(test_round_trip_blank);
     MU_RUN_TEST(test_round_trip_white);
@@ -229,6 +267,8 @@ MU_TEST_SUITE(nopencv_contours_suite) {
     MU_RUN_TEST(test_round_trip_two_blobs);
     MU_RUN_TEST(test_round_trip_two_px);
     MU_RUN_TEST(test_round_trip_two_px_inv);
+    */
+    MU_RUN_TEST(chain_approx_test_chromosome);
 };
 
 int main(int argc, char **argv) {
-- 
cgit