diff --git a/src/MaaCore/Vision/Miscellaneous/DepotImageAnalyzer.cpp b/src/MaaCore/Vision/Miscellaneous/DepotImageAnalyzer.cpp
index 03ddb88072..cf856ed3bd 100644
--- a/src/MaaCore/Vision/Miscellaneous/DepotImageAnalyzer.cpp
+++ b/src/MaaCore/Vision/Miscellaneous/DepotImageAnalyzer.cpp
@@ -320,12 +320,13 @@ int asst::DepotImageAnalyzer::match_quantity(const Rect& roi)
         digit_str.erase(m_pos, digit_str.size());
     }
 
+    constexpr char Dot = '.';
     if (digit_str.empty() ||
-        !ranges::all_of(digit_str, [](const char& c) -> bool { return std::isdigit(c) || c == '.'; })) {
+        !ranges::all_of(digit_str, [](const char& c) -> bool { return std::isdigit(c) || c == Dot; })) {
         return 0;
     }
-    if (auto dot_pos = digit_str.find('.'); dot_pos != std::string::npos) {
-        if (dot_pos == 0 || dot_pos == digit_str.size() - 1) {
+    if (auto dot_pos = digit_str.find(Dot); dot_pos != std::string::npos) {
+        if (dot_pos == 0 || dot_pos == digit_str.size() - 1 || digit_str.find(Dot, dot_pos + 1) != std::string::npos) {
             return 0;
         }
     }
diff --git a/src/MaaCore/Vision/Miscellaneous/StageDropsImageAnalyzer.cpp b/src/MaaCore/Vision/Miscellaneous/StageDropsImageAnalyzer.cpp
index 69bad6eca2..a95ca36045 100644
--- a/src/MaaCore/Vision/Miscellaneous/StageDropsImageAnalyzer.cpp
+++ b/src/MaaCore/Vision/Miscellaneous/StageDropsImageAnalyzer.cpp
@@ -553,12 +553,13 @@ int asst::StageDropsImageAnalyzer::match_quantity(const Rect& roi, bool use_word
         digit_str.erase(k_pos, digit_str.size());
     }
 
+    constexpr char Dot = '.';
     if (digit_str.empty() ||
-        !ranges::all_of(digit_str, [](const char& c) -> bool { return std::isdigit(c) || c == '.'; })) {
+        !ranges::all_of(digit_str, [](const char& c) -> bool { return std::isdigit(c) || c == Dot; })) {
         return 0;
     }
-    if (auto dot_pos = digit_str.find('.'); dot_pos != std::string::npos) {
-        if (dot_pos == 0 || dot_pos == digit_str.size() - 1) {
+    if (auto dot_pos = digit_str.find(Dot); dot_pos != std::string::npos) {
+        if (dot_pos == 0 || dot_pos == digit_str.size() - 1 || digit_str.find(Dot, dot_pos + 1) != std::string::npos) {
             return 0;
         }
     }