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import gradio as gr
import torch
from PIL import Image
import json
import numpy as np
import cv2
week8_model = torch.hub.load(
'./', 'custom', path='Weights/Week_8.pt', source='local')
week9_model = torch.hub.load(
'./', 'custom', path='Weights/Week_9.pt', source='local')
def draw_own_bbox(img,x1,y1,x2,y2,label,color=(36,255,12),text_color=(0,0,0)):
"""
Draw bounding box on the image with text label and save both the raw and annotated image in the 'own_results' folder
Inputs
------
img: numpy.ndarray - image on which the bounding box is to be drawn
x1: int - x coordinate of the top left corner of the bounding box
y1: int - y coordinate of the top left corner of the bounding box
x2: int - x coordinate of the bottom right corner of the bounding box
y2: int - y coordinate of the bottom right corner of the bounding box
label: str - label to be written on the bounding box
color: tuple - color of the bounding box
text_color: tuple - color of the text label
Returns
-------
None
"""
name_to_id = {
"NA": 'NA',
"Bullseye": 10,
"One": 11,
"Two": 12,
"Three": 13,
"Four": 14,
"Five": 15,
"Six": 16,
"Seven": 17,
"Eight": 18,
"Nine": 19,
"A": 20,
"B": 21,
"C": 22,
"D": 23,
"E": 24,
"F": 25,
"G": 26,
"H": 27,
"S": 28,
"T": 29,
"U": 30,
"V": 31,
"W": 32,
"X": 33,
"Y": 34,
"Z": 35,
"Up": 36,
"Down": 37,
"Right": 38,
"Left": 39,
"Up Arrow": 36,
"Down Arrow": 37,
"Right Arrow": 38,
"Left Arrow": 39,
"Stop": 40
}
# Reformat the label to {label name}-{label id}
label = label + "-" + str(name_to_id[label])
# Convert the coordinates to int
x1 = int(x1)
x2 = int(x2)
y1 = int(y1)
y2 = int(y2)
# Save the raw image
# img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
# Draw the bounding box
img = cv2.rectangle(img, (x1, y1), (x2, y2), color, 2)
# For the text background, find space required by the text so that we can put a background with that amount of width.
(w, h), _ = cv2.getTextSize(label, cv2.FONT_HERSHEY_SIMPLEX, 0.6, 1)
# Print the text
img = cv2.rectangle(img, (x1, y1 - 20), (x1 + w, y1), color, -1)
img = cv2.putText(img, label, (x1, y1 - 5), cv2.FONT_HERSHEY_SIMPLEX, 0.6, text_color, 1)
return img
def yolo(img, model, toggles, signal, size=1024):
if model == "Week 8":
model = week8_model
else:
model = week9_model
results = model(img)
# Original output image and results
original_results = json.loads(results.pandas().xyxy[0].to_json(orient="records"))
output_image = Image.fromarray(results.render()[0])
# Convert the results to a pandas dataframe and calculate the height and width of the bounding box and the area of the bounding box
df_results = results.pandas().xyxy[0]
df_results['bboxHt'] = df_results['ymax'] - df_results['ymin']
df_results['bboxWt'] = df_results['xmax'] - df_results['xmin']
df_results['bboxArea'] = df_results['bboxHt'] * df_results['bboxWt']
# Label with largest bbox height will be last
df_results = df_results.sort_values('bboxArea', ascending=False)
# Filter out Bullseye
pred_list = df_results
if 'Ignore Bullseye' in toggles:
pred_list = pred_list[pred_list['name'] != 'Bullseye']
if len(pred_list) == 0:
return [output_image, original_results, output_image, original_results]
elif len(pred_list) == 1:
pred = pred_list.iloc[0]
else:
pred_shortlist = []
current_area = pred_list.iloc[0]['bboxArea']
# For each prediction, check if the confidence is greater than 0.5 and if the area is greater than 80% of the current area or 60% if the prediction is 'One'
for _, row in pred_list.iterrows():
if row['confidence'] > 0.5 and ((current_area * 0.8 <= row['bboxArea']) or (row['name'] == 'One' and current_area * 0.6 <= row['bboxArea'])):
# Add the prediction to the shortlist
pred_shortlist.append(row)
# Update the current area to the area of the prediction
current_area = row['bboxArea']
# If only 1 prediction remains after filtering by confidence and area
if len(pred_shortlist) == 1:
# Choose that prediction
pred = pred_shortlist[0]
# If multiple predictions remain after filtering by confidence and area
else:
# Use signal of {signal} to filter further
# Sort the predictions by xmin
pred_shortlist.sort(key=lambda x: x['xmin'])
# If signal is 'L', choose the first prediction in the list, i.e. leftmost in the image
if signal == 'L':
pred = pred_shortlist[0]
# If signal is 'R', choose the last prediction in the list, i.e. rightmost in the image
elif signal == 'R':
pred = pred_shortlist[-1]
# If signal is 'C', choose the prediction that is central in the image
else:
# Loop through the predictions shortlist
for i in range(len(pred_shortlist)):
# If the xmin of the prediction is between 250 and 774, i.e. the center of the image, choose that prediction
if pred_shortlist[i]['xmin'] > 250 and pred_shortlist[i]['xmin'] < 774:
pred = pred_shortlist[i]
break
# If no prediction is central, choose the one with the largest area
if isinstance(pred,str):
# Choosing one with largest area if none are central
pred_shortlist.sort(key=lambda x: x['bboxArea'])
pred = pred_shortlist[-1]
filtered_img = draw_own_bbox(np.array(img), pred['xmin'], pred['ymin'], pred['xmax'], pred['ymax'], pred['name'])
return [output_image, original_results, filtered_img, json.loads(pred.to_json(orient="records"))]
inputs = [gr.inputs.Image(type='pil', label="Original Image"),
gr.inputs.Radio(['Week 8', 'Week 9'], type="value", default='Week 8', label='Model Selection'),
gr.CheckboxGroup(["Ignore Bullseye", "Biggest BBox Only and Position-Based Heuristics",], value=["Ignore Bullseye", "Biggest BBox Only and Position-Based Heuristics"], label="Heuristic Toggles"),
gr.inputs.Radio(['Left', 'Center', 'Right', 'Disabled'], type="value", default='Center', label='Position Heuristic'),
]
outputs = [gr.outputs.Image(type="pil", label="Output Image"),
gr.outputs.JSON(label="Output JSON"),
gr.outputs.Image(type="pil", label="Filtered Output Image"),
gr.outputs.JSON(label="Filtered Output JSON")
]
examples = [['Examples/One.jpg'], ['Examples/Two.jpg'], ['Examples/Three.jpg'], ['Examples/1.jpg'], ['Examples/2.jpg'], ['Examples/3.jpg'], ['Examples/4.jpg'], ['Examples/5.jpg'], ['Examples/6.jpg'],
['Examples/7.jpg'], ['Examples/8.jpg'], ['Examples/9.jpg'], ['Examples/10.jpg'], ['Examples/11.jpg'], ['Examples/12.jpg']]
with gr.Blocks(css="#custom_header {min-height: 2rem; text-align: center} #custom_title {min-height: 2rem}") as demo:
gr.Markdown("# YOLOv5 Symbol Recognition for CZ3004/SC2079 Multi-Disciplinary Project", elem_id="custom_header")
gr.Markdown("Gradio Demo for YOLOv5 Symbol Recognition for CZ3004 Multi-Disciplinary Project. To use it, simply upload your image, or click one of the examples to load them.", elem_id="custom_header")
gr.Markdown("CZ3004 is a module in Nanyang Technological University's Computer Science curriculum that involves creating a robot car that can navigate within an arena and around obstacles. Part of the assessment is to go to obstacles and detect alphanumeric symbols pasted on them.", elem_id="custom_title")
gr.Markdown("The two models available, Week 8 and Week 9, are for different subtasks. Week 8 model (as assessment was done in Week 8 of the school semester), \
is able to detect all symbols seen in the first three example images below. Week 9 model is limited to just the bullseye, left and right arrow symbols. \
Additionally, Week 9 model has been further trained on extreme edge cases where there is harsh sunlight behind the symbol/obstacle (seen in some of the examples).", elem_id="custom_title")
gr.Markdown("Heuristics used are based on the task as of AY22-23 Semester 2's edition of MDP. These include ignoring the bullseye symbol, taking only the biggest bounding box, and filtering similar sized detections by the expected position of the symbol based on where the robot is supposed to be relative to the symbol.", elem_id="custom_title")
gr.Markdown("This demo is part of a guide that is currently work-in-progress, for future CZ3004/SC2079 students to refer to.", elem_id="custom_title")
with gr.Row():
with gr.Column():
with gr.Box():
gr.Markdown("## Inputs", elem_id="custom_header")
input_image = gr.inputs.Image(type='pil', label="Original Image")
btn = gr.Button(value="Submit")
btn.style(full_width=True)
with gr.Column():
with gr.Box():
gr.Markdown("## Parameters", elem_id="custom_header")
model_selection = gr.inputs.Radio(['Week 8', 'Week 9'], type="value", default='Week 8', label='Model Selection')
toggles = gr.CheckboxGroup(["Ignore Bullseye", "Biggest BBox Only and Position-Based Heuristics",], value=["Ignore Bullseye", "Biggest BBox Only and Position-Based Heuristics"], label="Heuristic Toggles")
radios = gr.inputs.Radio(['Left', 'Center', 'Right', 'Disabled'], type="value", default='Center', label='Position Heuristic')
with gr.Row():
with gr.Box():
with gr.Column():
gr.Markdown("## Raw Outputs", elem_id="custom_header")
output_image = gr.outputs.Image(type="pil", label="Output Image")
output_json = gr.outputs.JSON(label="Output JSON")
with gr.Box():
with gr.Column():
gr.Markdown("## Filtered Outputs", elem_id="custom_header")
filtered_image = gr.outputs.Image(type="pil", label="Filtered Output Image")
filtered_json = gr.outputs.JSON(label="Filtered Output JSON")
with gr.Row():
gr.Examples(examples=examples,
inputs=input_image,
outputs=output_image,
fn=yolo,
cache_examples=False)
btn.click(yolo, inputs=[input_image, model_selection,toggles, radios], outputs=[output_image, output_json, filtered_image, filtered_json])
demo.launch(debug=True)