diff --git a/app/streamlit-ui.py b/app/streamlit-ui.py
index 53a5c1e..f4eadf7 100644
--- a/app/streamlit-ui.py
+++ b/app/streamlit-ui.py
@@ -18,6 +18,17 @@ DEEPSTACK_TIMEOUT = int(os.getenv("DEEPSTACK_TIMEOUT", 10))
 DEFAULT_CONFIDENCE_THRESHOLD = 0
 TEST_IMAGE = "street.jpg"
 
+DEFAULT_ROI_Y_MIN = 0.0
+DEFAULT_ROI_Y_MAX = 1.0
+DEFAULT_ROI_X_MIN = 0.0
+DEFAULT_ROI_X_MAX = 1.0
+DEFAULT_ROI = (
+    DEFAULT_ROI_Y_MIN,
+    DEFAULT_ROI_X_MIN,
+    DEFAULT_ROI_Y_MAX,
+    DEFAULT_ROI_X_MAX,
+)
+
 predictions = None
 
 
@@ -29,6 +40,7 @@ def process_image(pil_image, dsobject):
     return predictions
 
 
+## Setup sidebar
 st.title("Deepstack Object detection")
 img_file_buffer = st.file_uploader("Upload an image", type=["png", "jpg", "jpeg"])
 
@@ -36,12 +48,33 @@ st.sidebar.title("Parameters")
 CONFIDENCE_THRESHOLD = st.sidebar.slider(
     "Confidence threshold", 0, 100, DEFAULT_CONFIDENCE_THRESHOLD, 1
 )
+
 CLASSES_TO_INCLUDE = st.sidebar.multiselect(
     "Select object classes to include",
     options=const.CLASSES,
     default=const.DEFAULT_CLASSES,
 )
 
+# Get ROI info
+st.sidebar.title("ROI")
+ROI_X_MIN = st.sidebar.slider("x_min", 0.0, 1.0, DEFAULT_ROI_X_MIN)
+ROI_Y_MIN = st.sidebar.slider("y_min", 0.0, 1.0, DEFAULT_ROI_Y_MIN)
+ROI_X_MAX = st.sidebar.slider("x_max", 0.0, 1.0, DEFAULT_ROI_X_MAX)
+ROI_Y_MAX = st.sidebar.slider("y_max", 0.0, 1.0, DEFAULT_ROI_Y_MAX)
+ROI_TUPLE = (
+    ROI_Y_MIN,
+    ROI_X_MIN,
+    ROI_Y_MAX,
+    ROI_X_MAX,
+)
+ROI_DICT = {
+    "x_min": ROI_X_MIN,
+    "y_min": ROI_Y_MIN,
+    "x_max": ROI_X_MAX,
+    "y_max": ROI_Y_MAX,
+}
+
+## Process image
 if img_file_buffer is not None:
     pil_image = Image.open(img_file_buffer)
 
@@ -59,7 +92,9 @@ all_objects_names = set([obj["name"] for obj in objects])
 # Filter objects for display
 objects = [obj for obj in objects if obj["confidence"] > CONFIDENCE_THRESHOLD]
 objects = [obj for obj in objects if obj["name"] in CLASSES_TO_INCLUDE]
+objects = [obj for obj in objects if utils.object_in_roi(ROI_DICT, obj["centroid"])]
 
+# Draw object boxes
 draw = ImageDraw.Draw(pil_image)
 for obj in objects:
     name = obj["name"]
@@ -76,13 +111,25 @@ for obj in objects:
         color=const.YELLOW,
     )
 
+# Draw ROI box
+if ROI_TUPLE != DEFAULT_ROI:
+    utils.draw_box(
+        draw,
+        ROI_TUPLE,
+        pil_image.width,
+        pil_image.height,
+        text="ROI",
+        color=const.GREEN,
+    )
+
+# Display image and results
 st.image(
     np.array(pil_image), caption=f"Processed image", use_column_width=True,
 )
 st.subheader("All discovered objects")
 st.write(all_objects_names)
 
-st.subheader("Object count")
+st.subheader("Filtered object count")
 obj_types = list(set([obj["name"] for obj in objects]))
 for obj_type in obj_types:
     obj_type_count = len([obj for obj in objects if obj["name"] == obj_type])
diff --git a/usage.png b/usage.png
index 5d91a2c..4618c9f 100644
Binary files a/usage.png and b/usage.png differ