Update test_h5image.py

test_h5image.py

 from h5Image import H5Image
+import cv2
 
 
 h5_image = H5Image("/projects/bbym/shared/data/commonPatchData/256/OK_250K.hdf5", mode='r', patch_border=0)
@@ -6,4 +7,8 @@ h5_image = H5Image("/projects/bbym/shared/data/commonPatchData/256/OK_250K.hdf5"
 map_name = h5_image.get_maps()[0]
 map_array = h5_image.get_map(map_name)
 
-print("map_array.shape", map_array.shape)
\ No newline at end of file
+print("map_array.shape", map_array.shape)
+
+
+# Convert the map array to a grayscale image
+gray = cv2.cvtColor(map_array, cv2.COLOR_BGR2GRAY)  # greyscale image
\ No newline at end of file