evmlmotion: area configure

opencv-motion-detect/evmlmotion.cpp

@@ -654,7 +654,7 @@ private:
             avg.release();
             avg = gray.clone();
             first = false;
-            area = detPara.area == 0 ? (AREA_1080P * detPara.size * 1.0/1080) : detPara.area;
+            area = detPara.area == 0 ? (AREA_1080P * detPara.size * detPara.size * 1.0/1080/1080) : detPara.area;
             spdlog::info("{} resize: {}, area: {}, origin area: {}", selfId, detPara.resize, area, detPara.area);
             return;
         }