https://community.esri.com/t5/python-questions/cv2-error-scannedmapdigitizer/m-p/1164512#M64343 <P>I'm trying to repeat the code from&nbsp;<A href="https://developers.arcgis.com/python/guide/geo-referencing-and-digitization-of-scanned-maps/" target="_blank" rel="noopener"> https://developers.arcgis.com/python/guide/geo-referencing-and-digitization-of-scanned-maps/</A></P><P>&nbsp;</P><P>&nbsp;</P><LI-CODE lang="python">from arcgis.learn import ScannedMapDigitizer smd = ScannedMapDigitizer(r"D:\Arcgis\TEST\RASTER", r"D:\Arcgis\TEST\RASTER\OUT") smd.create_mask(color_list=[[115, 178, 115]], color_delta=10, kernel_size=[3, 3], kernel_type="rect", show_result=False) smd.create_template_image([100, 100,100], 10, 4, show_result= False) extent = { 'spatialReference': {'wkid': 4326}, 'xmin': -180, 'ymin': -89, 'xmax': 180, 'ymax': 85 } smd.set_search_region_extent(extent) ssearch_extent = { 'spatialReference': {'wkid': 4326}, 'xmin': -180, 'ymin': -89, 'xmax': 180, 'ymax': 85 } smd.prepare_search_region(r"D:\Arcgis\cover2_admin_M1-1.0\cover2_admin_M1-1.0.shp", [255, 255, 255], search_extent, 2068, 3744, show_result=True) smd.match_template_multiscale(0.2, 2.0, 40, show_result=False) smd.georeference_image((150, 50), show_result=False) smd.digitize_image(show_result=False)</LI-CODE><P>&nbsp;</P><P><SPAN>The script throws an error</SPAN></P><P>Traceback (most recent call last):<BR />File "D:\Arcgis\SCRIPT\LEARN.py", line 4, in &lt;module&gt;<BR />smd.create_mask(color_list=[[115, 178, 115]], color_delta=10, kernel_size=[3, 3], kernel_type="rect", show_result=False)<BR />File "C:\Users\WF\AppData\Local\Programs\Python\Python39\lib\site-packages\arcgis\learn\_scannedmapdigitizer.py", line 1763, in create_mask<BR />rgb_img = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)<BR />cv2.error: OpenCV(4.5.5) D:\a\opencv-python\opencv-python\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'</P><P><SPAN>Tell me where I went wrong ???</SPAN></P> Fri, 15 Apr 2022 06:51:10 GMT Sergey_Grechkin 2022-04-15T06:51:10Z https://community.esri.com/t5/python-questions/cv2-error-scannedmapdigitizer/m-p/1164512#M64343 <P>I'm trying to repeat the code from&nbsp;<A href="https://developers.arcgis.com/python/guide/geo-referencing-and-digitization-of-scanned-maps/" target="_blank" rel="noopener"> https://developers.arcgis.com/python/guide/geo-referencing-and-digitization-of-scanned-maps/</A></P><P>&nbsp;</P><P>&nbsp;</P><LI-CODE lang="python">from arcgis.learn import ScannedMapDigitizer smd = ScannedMapDigitizer(r"D:\Arcgis\TEST\RASTER", r"D:\Arcgis\TEST\RASTER\OUT") smd.create_mask(color_list=[[115, 178, 115]], color_delta=10, kernel_size=[3, 3], kernel_type="rect", show_result=False) smd.create_template_image([100, 100,100], 10, 4, show_result= False) extent = { 'spatialReference': {'wkid': 4326}, 'xmin': -180, 'ymin': -89, 'xmax': 180, 'ymax': 85 } smd.set_search_region_extent(extent) ssearch_extent = { 'spatialReference': {'wkid': 4326}, 'xmin': -180, 'ymin': -89, 'xmax': 180, 'ymax': 85 } smd.prepare_search_region(r"D:\Arcgis\cover2_admin_M1-1.0\cover2_admin_M1-1.0.shp", [255, 255, 255], search_extent, 2068, 3744, show_result=True) smd.match_template_multiscale(0.2, 2.0, 40, show_result=False) smd.georeference_image((150, 50), show_result=False) smd.digitize_image(show_result=False)</LI-CODE><P>&nbsp;</P><P><SPAN>The script throws an error</SPAN></P><P>Traceback (most recent call last):<BR />File "D:\Arcgis\SCRIPT\LEARN.py", line 4, in &lt;module&gt;<BR />smd.create_mask(color_list=[[115, 178, 115]], color_delta=10, kernel_size=[3, 3], kernel_type="rect", show_result=False)<BR />File "C:\Users\WF\AppData\Local\Programs\Python\Python39\lib\site-packages\arcgis\learn\_scannedmapdigitizer.py", line 1763, in create_mask<BR />rgb_img = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)<BR />cv2.error: OpenCV(4.5.5) D:\a\opencv-python\opencv-python\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'</P><P><SPAN>Tell me where I went wrong ???</SPAN></P> Fri, 15 Apr 2022 06:51:10 GMT https://community.esri.com/t5/python-questions/cv2-error-scannedmapdigitizer/m-p/1164512#M64343 Sergey_Grechkin 2022-04-15T06:51:10Z https://community.esri.com/t5/python-questions/cv2-error-scannedmapdigitizer/m-p/1167762#M64407 <P>A little late to reply... but how are you running this code?<BR /><BR />That error looks like it's calling OpenCV from your D drive. Do you have OpenCV installed more than once on your computer (outside of ArcPro)?<BR /><BR />There are some notorious Python/Conda OpenCV installation and path conflict issues. Perhaps for some reason arcpy is seeing the wrong cv2.</P> Mon, 25 Apr 2022 23:25:42 GMT https://community.esri.com/t5/python-questions/cv2-error-scannedmapdigitizer/m-p/1167762#M64407 Anonymous User 2022-04-25T23:25:42Z