Create app.py

app.py

@@ -0,0 +1,202 @@
+import cv2
+import numpy as np
+import math
+from PIL import Image, ImageDraw, ImageFont, ImageOps
+Image.MAX_IMAGE_PIXELS = None
+import gradio as gr
+
+def get_exif(image_path):
+    try:
+        with Image.open(image_path) as img:
+            exif_data = img.getexif()
+            # print(exif_data)
+            if not exif_data:
+                return None, None, None
+            if "Local Coordinates (m)" in exif_data[34737]:
+                return None, None, None
+            pixel_scale = exif_data[33550]  # Tag ID for PixelScale
+            model_tie_point = exif_data[33922]  # Tag ID for ModelTiePoint
+            pixel_scale_x, pixel_scale_y, _ = pixel_scale
+            _, _, _, _, latitude, _ = model_tie_point
+            return pixel_scale_x, pixel_scale_y, latitude
+    except Exception as e:
+        print(f"Error extracting metadata: {e}")
+        return None, None, None
+    
+def pixel_size_in_feet(x_scale_degrees, latitude):
+    meters_per_degree_lat = 111320  # Average meters per degree of latitude
+    meters_per_degree_lon = meters_per_degree_lat * math.cos(math.radians(latitude))
+    pixel_size_x_feet = x_scale_degrees * meters_per_degree_lon * 3.28084
+    return pixel_size_x_feet
+
+def feet_per_inch(dpi, pixel_size_x_feet):
+    # Calculate the number of pixels in 1 inch
+    pixels_per_inch = dpi
+    # Calculate the number of feet in 1 inch
+    feet_per_inch = pixels_per_inch * pixel_size_x_feet
+    return feet_per_inch
+
+def nearest_number(n):
+    numbers = [1, 5, 10, 20, 50, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000]
+    return min(numbers, key=lambda x: abs(x - n))
+    
+def calculate_dpi(x_scale_degrees, latitude):
+    pixel_size_x_feet = pixel_size_in_feet(x_scale_degrees, latitude)
+    pixel_size_x_inches = pixel_size_x_feet / 12
+    dpi = 1 / pixel_size_x_inches
+    
+    return dpi
+
+def add_white_space(img):
+    _, height_px = img.size
+    bottom_space = int(height_px * 0.2)  # Calculate the size of the bottom space
+    top_space = int(height_px * 0.1)  # Calculate the size of the top space
+    new_height_px = int(height_px + bottom_space + top_space)
+    img = ImageOps.expand(img, border=(0, top_space, 0, bottom_space), fill='white')
+    return img, new_height_px
+
+def add_white_space_right(img):
+    width_px, height_px = img.size
+    right_space = int(width_px * 0.3)  # Calculate the size of the right space
+    left_space = int(width_px * 0.1)  # Calculate the size of the left space
+    new_width_px = int(width_px + right_space)
+    img = ImageOps.expand(img, border=(0, 0, right_space, 0), fill='white')
+    return img
+
+def draw_scale_bar(right_img, exif_data, compass, line_img, paste_x_position, paste_y_position):
+    pixel_scale_x = exif_data[0]
+    pixel_scale_y = exif_data[1]
+    latitude = exif_data[2]
+    if pixel_scale_x is None or pixel_scale_y is None or latitude is None:
+        return
+    # Calculate pixel size in feet
+    pixel_size_x = pixel_size_in_feet(pixel_scale_x, latitude)
+    image_width_feet = round(line_img.width * pixel_size_x)
+    scale_max = nearest_number(image_width_feet / 5)
+    # Calculate scale bar dimensions
+    scale_bar_width_px = int(line_img.width * (scale_max / image_width_feet))
+    scale_bar_height_px = int(scale_bar_width_px * 0.08)
+    # x_position = int(right_img.width * 0.90 - scale_bar_width_px)  # Adjusted for 5% from the right
+    x_position = paste_x_position
+    y_position = int(right_img.height - (right_img.height - paste_y_position - scale_bar_height_px) * 2)   # Adjusted for new height
+    font_size = int(scale_bar_width_px * 0.1)
+    # Draw scale bar
+    draw = ImageDraw.Draw(right_img)
+    try:
+        font = ImageFont.truetype("Arial Unicode.ttf", font_size) #DejaVuSans.ttf, Arial.ttf
+        print("loaded font")
+    except IOError:
+        font = ImageFont.load_default()
+        print("default :()")
+    section_width = scale_bar_width_px / 4
+    section_x_position = x_position - 1 * section_width #base 0 incremental position
+    text_position = (section_x_position + section_width - font_size / 4, y_position - font_size - 20)
+    draw.text(text_position, "0", fill="black", font=font)
+    for i in range(4): #other incremental positions
+        section_x_position = x_position + i * section_width
+        fill_color = "black" if i % 2 == 0 else "white"
+        draw.rectangle([section_x_position, y_position, section_x_position + section_width, y_position + scale_bar_height_px], fill=fill_color)
+        text = str(round(scale_max / 4 * (i + 1), 2))
+        if text.endswith('.0'):
+            text = text.rstrip('0').rstrip('.')
+        if i == 3:
+            text += " feet"
+        text_position = (section_x_position + section_width - font_size / 4, y_position - font_size - 20)
+        draw.text(text_position, text, fill="black", font=font)
+            
+    # Draw outline around scale bar
+    outline_width = 3
+    draw.line([(x_position, y_position), (x_position + scale_bar_width_px, y_position)], fill="black", width=outline_width)
+    draw.line([(x_position, y_position), (x_position, y_position + scale_bar_height_px)], fill="black", width=outline_width)
+    draw.line([(x_position + scale_bar_width_px, y_position), (x_position + scale_bar_width_px, y_position + scale_bar_height_px)], fill="black", width=outline_width)
+    draw.line([(x_position, y_position + scale_bar_height_px), (x_position + scale_bar_width_px, y_position + scale_bar_height_px)], fill="black", width=outline_width)
+    
+    #feet per inch
+    try:
+        font = ImageFont.truetype("Arial Unicode.ttf", int(font_size * 1.3)) #DejaVuSans.ttf, Arial.ttf
+    except IOError:
+        font = ImageFont.load_default()
+    dpi = calculate_dpi(pixel_scale_x, latitude)
+    dpi = 96
+    fpi = round(feet_per_inch(dpi, pixel_size_x), 2)
+    feet_per_inch_text = '1" = ' + str(fpi) + ' feet'
+    paste_y_position = int(right_img.height - (right_img.height - paste_y_position - scale_bar_height_px) * 3)
+    text_position = (x_position, paste_y_position)
+    # text_position = (x_position, y_position - font_size - 200)
+    draw.text(text_position, feet_per_inch_text, fill='black', font=font)
+    
+    # # Add in a small compass
+    compass = compass.convert("RGBA")
+    new_compass_width = int(right_img.width * 0.05)
+    compass_ratio = new_compass_width / compass.width
+    new_compass_height = int(compass.height * compass_ratio)
+    compass = compass.resize((new_compass_width, new_compass_height))
+    # Paste the compass in the top right of the image with 5% margin
+    paste_compass_x_position = int(right_img.width - (right_img.width + new_compass_width * 2 - paste_x_position) / 2)
+    # paste_compass_x_position = int(right_img.width * 0.05)
+    paste_compass_y_position = int(right_img.height * 0.05)  # 5% margin on the top
+    right_img.paste(compass, (paste_compass_x_position, paste_compass_y_position), compass)
+    return right_img
+
+def watermark(right_img, sb_logo, line_img):
+    sb_logo = sb_logo.convert("RGBA")
+    new_logo_width = int(line_img.width * 0.2)
+    logo_ratio = new_logo_width / sb_logo.width
+    new_logo_height = int(sb_logo.height * logo_ratio)
+    sb_logo = sb_logo.resize((new_logo_width, new_logo_height))
+    # Calculate the position for the logo to be 5% from the right
+    paste_x_position = int(right_img.width * 0.95 - new_logo_width)
+    paste_y_position = int(right_img.height * 0.95 - new_logo_height)#new_height_px - new_logo_height - int(bottom_space / 4)
+    right_img.paste(sb_logo, (paste_x_position, paste_y_position), sb_logo)
+    return right_img, paste_x_position, paste_y_position
+        
+def freemium_watermark(img, sb_logo):
+    width_px, height_px = img.size
+    # Convert the logo to "RGBA" mode and resize it to 80% of the image width
+    sb_logo = sb_logo.convert("RGBA")
+    new_logo_width = int(width_px * 0.8)  # 80% of the image width
+    logo_ratio = new_logo_width / sb_logo.width
+    new_logo_height = int(sb_logo.height * logo_ratio)
+    sb_logo = sb_logo.resize((new_logo_width, new_logo_height))
+    # Make the logo semi-translucent
+    transparent_img = Image.new('RGBA', (sb_logo.width, sb_logo.height), (0, 0, 0, 0))  # Create a transparent image of the same size
+    sb_logo = Image.blend(transparent_img, sb_logo, alpha=0.3)  # Blend the logo with the transparent image
+    # Calculate the position to paste the logo at the center of the image
+    paste_x_position = (width_px - new_logo_width) // 2
+    paste_y_position = (height_px - new_logo_height) // 2
+    img.paste(sb_logo, (paste_x_position, paste_y_position), sb_logo)
+    # Save the image
+    return img
+
+def create_line_drawing(input_path):
+    with Image.open(input_path) as img:
+        img_array = np.array(img)
+    # Line processing
+    blurred = cv2.GaussianBlur(img_array, (7, 7), 0)
+    edges = cv2.Canny(blurred, 100, 180)
+    structuring_element = cv2.getStructuringElement(cv2.MORPH_RECT, (4,3))
+    dilated_edges = cv2.dilate(edges, structuring_element, iterations=1)
+    line_drawing = 255 - dilated_edges
+    line_img = Image.fromarray(line_drawing)
+    
+    right_img = add_white_space_right(line_img)
+    right_img, paste_x_position, paste_y_position = watermark(right_img, sb_logo, line_img)
+    exif_data = list(get_exif(input_path))
+    if str(exif_data) != str([None, None, None]):
+        print(str(exif_data))
+        print("drawing scale bar")
+        line_img = draw_scale_bar(right_img, exif_data, compass, line_img, paste_x_position, paste_y_position)
+        line_img = freemium_watermark(line_img, sb_logo)
+        return line_img
+    else:
+        line_img = freemium_watermark(line_img, sb_logo)
+        return line_img
+        
+sb_logo = Image.open("./SB_logo_horizontal.png")
+compass = Image.open("./compass.jpg")
+
+demo = gr.Interface(create_line_drawing, 
+                    inputs=gr.File(type="filepath"), 
+                    outputs="image",
+                    live=True)
+demo.queue(max_size=10).launch()