diff --git a/src/gui/panels/step4_sampling_panel.py b/src/gui/panels/step4_sampling_panel.py
index 7bf5270..10a1cea 100644
--- a/src/gui/panels/step4_sampling_panel.py
+++ b/src/gui/panels/step4_sampling_panel.py
@@ -130,7 +130,7 @@ class Step4SamplingPanel(QWidget):
         params_layout.addRow("内存处理块大小:", w3)
 
         self.use_adaptive_sampling = QCheckBox("启用自适应边缘采样")
-        self.use_adaptive_sampling.setChecked(True)
+        self.use_adaptive_sampling.setChecked(False)
         params_layout.addRow("智能模式:", self.use_adaptive_sampling)
 
         params_group.setLayout(params_layout)
diff --git a/src/utils/sampling.py b/src/utils/sampling.py
index 418e1e2..f006024 100644
--- a/src/utils/sampling.py
+++ b/src/utils/sampling.py
@@ -86,7 +86,7 @@ def get_wavelengths_from_bil_header(bil_file):
 
 def get_spectral_sampling_points_chunked(bil_file, water_mask_shp, severe_glint=None, output_csvpath=None,
                                          interval=100, sample_radius=1, chunk_size=1000,
-                                         use_adaptive_sampling=True, min_interval=10, max_interval=200):
+                                         use_adaptive_sampling=True, min_interval=50, max_interval=200):
     """
     基于bil文件、shp格式water_mask和severe_glint生成采样点并提取光谱数据（分块处理版本）
 
@@ -423,7 +423,7 @@ def get_spectral_sampling_points_chunked(bil_file, water_mask_shp, severe_glint=
 
 def get_spectral_sampling_points(bil_file, water_mask_shp, severe_glint=None, output_csvpath=None,
                                  interval=100, sample_radius=1,
-                                 use_adaptive_sampling=True, min_interval=10, max_interval=200):
+                                 use_adaptive_sampling=True, min_interval=50, max_interval=200):
     """
     基于bil文件、shp格式water_mask和severe_glint生成采样点并提取光谱数据