From 96fc17b99d56eb636c894c5be9ab39bfdb4ba454 Mon Sep 17 00:00:00 2001
From: Chris Xiong <chirs241097@gmail.com>
Date: Sat, 27 Aug 2022 00:55:38 -0400
Subject: Initial code dump.

---
 tests/image_util_tests.cpp | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 tests/image_util_tests.cpp

(limited to 'tests/image_util_tests.cpp')

diff --git a/tests/image_util_tests.cpp b/tests/image_util_tests.cpp
new file mode 100644
index 0000000..af77f75
--- /dev/null
+++ b/tests/image_util_tests.cpp
@@ -0,0 +1,46 @@
+#include "imageutil.hpp"
+
+#include <cstdio>
+#include <string>
+
+#include <opencv2/imgcodecs.hpp>
+#include <opencv2/highgui.hpp>
+#include <opencv2/imgproc.hpp>
+
+int main(int argc, char** argv)
+{
+    if (argc < 2)
+    {
+        printf("usage: %s <image file>\n", argv[0]);
+        return 1;
+    }
+    cv::Mat i = cv::imread(argv[1], cv::IMREAD_UNCHANGED);
+    if (i.data == NULL)
+    {
+        printf("invalid image.\n");
+        return 1;
+    }
+    cv::Mat fi, bw;
+    double sc = 1;
+    switch (i.depth())
+    {
+        case CV_8U: sc = 1. / 255; break;
+        case CV_16U: sc = 1. / 65535; break;
+    }
+    i.convertTo(fi, CV_32F, sc);
+    if (fi.channels() == 4)
+        fi = image_util::blend_white(fi);
+    cv::cvtColor(fi, bw, cv::COLOR_RGB2GRAY);
+    cv::imshow(std::string("test"), bw);
+    cv::Range xr, yr;
+    double contrast_threshold = 0.05;
+    double max_crop_ratio = 0.25;
+    xr = image_util::crop_axis(bw, 0, contrast_threshold, max_crop_ratio);
+    yr = image_util::crop_axis(bw, 1, contrast_threshold, max_crop_ratio);
+    cv::Mat cfi = image_util::crop(bw, contrast_threshold, max_crop_ratio);
+    cv::imshow(std::string("cropped"), cfi);
+    printf("xxx [%d, %d) [%d, %d)\n", yr.start, yr.end, xr.start, xr.end);
+    puts("press q to quit.");
+    while (cv::waitKey(0) != 'q');
+    return 0;
+}
-- 
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