From 0bd8a93f14a4f2c44ada7e27eef57efa38d8af63 Mon Sep 17 00:00:00 2001
From: Fam Zheng <fam@euphon.net>
Date: Thu, 20 Mar 2025 23:10:46 -0700
Subject: [PATCH] alg: Factor in camera_sensitivity in sobel check

---
 alg/libqr.cpp       | 2 +-
 alg/libqr.h         | 1 +
 alg/qrtool_wasm.cpp | 1 +
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/alg/libqr.cpp b/alg/libqr.cpp
index 16f1618..c7827e7 100644
--- a/alg/libqr.cpp
+++ b/alg/libqr.cpp
@@ -242,7 +242,7 @@ bool check_blur_by_laplacian(ProcessState &ps, Mat &gray, string &err)
 static
 bool check_blur_by_sobel(ProcessState &ps, Mat &gray, string &err)
 {
-    const float thres = 15;
+    const float thres = ps.sobel_thres;
     Mat sobel_x, sobel_y;
     Sobel(gray, sobel_x, CV_64F, 1, 0, 3);
     Sobel(gray, sobel_y, CV_64F, 0, 1, 3);
diff --git a/alg/libqr.h b/alg/libqr.h
index ffc06c1..bd69077 100644
--- a/alg/libqr.h
+++ b/alg/libqr.h
@@ -25,6 +25,7 @@ struct ProcessState {
     string qrcode = "";
     double clarity;
     float laplacian_thres = 0.1;
+    float sobel_thres = 15;
     int sharpness_method = 2;
 };
 
diff --git a/alg/qrtool_wasm.cpp b/alg/qrtool_wasm.cpp
index 6cfd914..88910a4 100644
--- a/alg/qrtool_wasm.cpp
+++ b/alg/qrtool_wasm.cpp
@@ -29,6 +29,7 @@ const char *qrtool_angle(uint8_t *data,
                          float camera_sensitivity) {
     ProcessState ps;
     ps.laplacian_thres = camera_sensitivity / 10.0;
+    ps.sobel_thres = camera_sensitivity * 15;
     auto start = std::chrono::system_clock::now();
     static char ret[512];
     printf("qrtool_angle, width: %d height %d\n", width, height);