diff --git a/FigureGenerator/screenshot_maker.py b/FigureGenerator/screenshot_maker.py
index 9bec310..6f8992e 100644
--- a/FigureGenerator/screenshot_maker.py
+++ b/FigureGenerator/screenshot_maker.py
@@ -140,7 +140,6 @@ def __init__(self, args):
         self.read_images_and_store_arrays()
 
     def read_images_and_store_arrays(self):
-
         input_images = [
             rescale_intensity(resample_image(sitk.ReadImage(image)))
             for image in self.images
@@ -262,7 +261,9 @@ def read_images_and_store_arrays(self):
             self.input_masks_bounded = None
             # if mask is not defined, pick the middle of the array
             max_id = (
-                np.around(np.true_divide(np.array(self.input_images_bounded)[0].shape, 2))
+                np.around(
+                    np.true_divide(np.array(self.input_images_bounded)[0].shape, 2)
+                )
                 .astype(int)
                 .tolist()
             )
@@ -315,7 +316,6 @@ def save_image(self, output_file):
             for mask_slice in mask_slices:
                 for image_slice in image_slices:
                     for i, _ in enumerate(image_slice):
-
                         mask = None
                         if mask_slice[i] is not None:
                             mask = mask_slice[i]
@@ -387,3 +387,47 @@ def save_image(self, output_file):
 
         plt.tight_layout()
         plt.savefig(os.path.join(output_file))
+
+
+def figure_generator(
+    input_images: str,
+    ylabels: str,
+    output: str,
+    input_mask: str = None,
+    opacity: float = 0.5,
+    borderpc: float = 0.05,
+    axisrow: bool = False,
+    fontsize: int = 15,
+    boundtype: str = "image",
+) -> None:
+    """
+    This is a functional interface to the class :class:`FigureGenerator`. It takes in the same arguments as the class and generates the figure.
+
+    Args:
+        input_images (str): The input images separated by comma. The images should be in the same order as the ylabels.
+        ylabels (str): The ylabels separated by comma. The ylabels should be in the same order as the input images.
+        output (str): The output file name.
+        input_mask (str, optional): The input masks separated by comma. The masks should be in the same order as the input images. Defaults to None.
+        opacity (float, optional): The opacity of the mask. Defaults to 0.5.
+        borderpc (float, optional): The border percentage of the mask. Defaults to 0.05.
+        axisrow (bool, optional): Whether to show the axis row. Defaults to False.
+        fontsize (int, optional): The fontsize of the figure. Defaults to 15.
+        boundtype (str, optional): The type of bounding. Can be "image" or "mask". Defaults to "image".
+    """
+    assert len(input_images.split(",")) == len(
+        ylabels.split(",")
+    ), "Number of images and number of ylabels should be same"
+    import argparse
+
+    # save the screenshot
+    args_for_fig_gen = argparse.ArgumentParser()
+    args_for_fig_gen.images = input_images
+    args_for_fig_gen.ylabels = ylabels
+    args_for_fig_gen.opacity = opacity
+    args_for_fig_gen.borderpc = borderpc
+    args_for_fig_gen.axisrow = axisrow
+    args_for_fig_gen.fontsize = fontsize
+    args_for_fig_gen.boundtype = boundtype
+    args_for_fig_gen.output = output
+    fig_generator = FigureGenerator(args_for_fig_gen)
+    fig_generator.save_image(args_for_fig_gen.output)