app.py

import streamlit as st 
import tensorflow as tf
from PIL import Image
import numpy as np
import cv2
import matplotlib.pyplot as plt
from imutils import perspective
from scipy.spatial import distance as dist

model=tf.keras.models.load_model("dental_xray_seg.h5")
    
st.header("Segmentation of Teeth in Panoramic X-ray Image")

examples=["teeth_01.png","teeth_02.png","teeth_03.png","teeth_04.png"]

def load_image(image_file):
	img = Image.open(image_file)
	return img

def convert_one_channel(img):
    #some images have 3 channels , although they are grayscale image
    if len(img.shape)>2:
        img= cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
        return img
    else:
        return img
    
def convert_rgb(img):
    #some images have 3 channels , although they are grayscale image
    if len(img.shape)==2:
        img= cv2.cvtColor(img,cv2.COLOR_GRAY2RGB)  
        return img
    else:
        return img

def midpoint(ptA, ptB):
	return ((ptA[0] + ptB[0]) * 0.5, (ptA[1] + ptB[1]) * 0.5)

def CCA_Analysis(orig_image,predict_image,erode_iteration,open_iteration):
    kernel1 =( np.ones((5,5), dtype=np.float32))
    kernel_sharpening = np.array([[-1,-1,-1],
                                  [-1,9,-1],
                                 [-1,-1,-1]])
    image = predict_image
    image2 =orig_image
    image=cv2.morphologyEx(image, cv2.MORPH_OPEN, kernel1,iterations=open_iteration )
    image = cv2.filter2D(image, -1, kernel_sharpening)
    image=cv2.erode(image,kernel1,iterations =erode_iteration)
    image=cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
    thresh = cv2.threshold(image, 0, 255, cv2.THRESH_BINARY + cv2.THRESH_OTSU)[1]
    labels=cv2.connectedComponents(thresh,connectivity=8)[1]
    a=np.unique(labels)
    count2=0
    for label in a:
        if label == 0:
            continue

        # Create a mask
        mask = np.zeros(thresh.shape, dtype="uint8")
        mask[labels == label] = 255
        # Find contours and determine contour area
        cnts,hieararch = cv2.findContours(mask.copy(), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
        cnts = cnts[0]
        c_area = cv2.contourArea(cnts)
        # threshhold for tooth count
        if c_area>1000:
            count2+=1

        (x,y),radius = cv2.minEnclosingCircle(cnts)
        rect = cv2.minAreaRect(cnts)
        box = cv2.boxPoints(rect)
        box = np.array(box, dtype="int")
        box = perspective.order_points(box)
        color1 = (list(np.random.choice(range(150), size=3)))
        color =[int(color1[0]), int(color1[1]), int(color1[2])]
        cv2.drawContours(image2,[box.astype("int")],0,color,2)
        (tl,tr,br,bl)=box

        (tltrX,tltrY)=midpoint(tl,tr)
        (blbrX,blbrY)=midpoint(bl,br)
    	# compute the midpoint between the top-left and top-right points,
    	# followed by the midpoint between the top-righ and bottom-right
        (tlblX,tlblY)=midpoint(tl,bl)
        (trbrX,trbrY)=midpoint(tr,br)
    	# draw the midpoints on the image
        cv2.circle(image2, (int(tltrX), int(tltrY)), 5, (255, 0, 0), -1)
        cv2.circle(image2, (int(blbrX), int(blbrY)), 5, (255, 0, 0), -1)
        cv2.circle(image2, (int(tlblX), int(tlblY)), 5, (255, 0, 0), -1)
        cv2.circle(image2, (int(trbrX), int(trbrY)), 5, (255, 0, 0), -1)
        cv2.line(image2, (int(tltrX), int(tltrY)), (int(blbrX), int(blbrY)),color, 2)
        cv2.line(image2, (int(tlblX), int(tlblY)), (int(trbrX), int(trbrY)),color, 2)
        dA = dist.euclidean((tltrX, tltrY), (blbrX, blbrY))
        dB = dist.euclidean((tlblX, tlblY), (trbrX, trbrY))



        pixelsPerMetric=1
        dimA = dA * pixelsPerMetric
        dimB = dB *pixelsPerMetric
        cv2.putText(image2, "{:.1f}pixel".format(dimA),(int(tltrX - 15), int(tltrY - 10)), cv2.FONT_HERSHEY_SIMPLEX,0.65, color, 2)
        cv2.putText(image2, "{:.1f}pixel".format(dimB),(int(trbrX + 10), int(trbrY)), cv2.FONT_HERSHEY_SIMPLEX,0.65, color, 2)
        cv2.putText(image2, "{:.1f}".format(label),(int(tltrX - 35), int(tltrY - 5)), cv2.FONT_HERSHEY_SIMPLEX,0.65, color, 2)
    teeth_count=count2
    return image2,teeth_count    
    
def detect_decays_static_th(images, dental_masks=None, threshhold=0.9):
    decay_masks = []
    for image, dental_mask in zip(images, dental_masks):
        decay_mask = np.zeros_like(dental_mask)
        image_masked_with_dental_mask = image * dental_mask
        decay_mask[image_masked_with_dental_mask > threshhold*255] = 1
        decay_masks.append(decay_mask)
    decay_masks = np.array(decay_masks)
    return decay_masks    
    
    
st.subheader("Upload Dental Panoramic X-ray Image")
image_file = st.file_uploader("Upload Images", type=["png","jpg","jpeg"])

col1, col2, col3, col4 = st.columns(4)
with col1:
    ex=load_image(examples[0])
    st.image(ex,width=200)
    if st.button('Example 1'):
        image_file=examples[0]

with col2:
    ex1=load_image(examples[1])
    st.image(ex1,width=200)
    if st.button('Example 2'):
        image_file=examples[1]

with col3:
    ex2=load_image(examples[2])
    st.image(ex2,width=200)
    if st.button('Example 3'):
        image_file=examples[2]
    
with col4:
    ex2=load_image(examples[3])
    st.image(ex2,width=200)
    if st.button('Example 4'):
        image_file=examples[3]

if image_file is not None:

    image=cv2.imread(image_file)
      
    st.subheader("Original Image")  
    st.image(image,width=1100)

    st.text("Making A Prediction ....")
      
    img=np.asarray(image)

    img_cv=convert_one_channel(img)
    img_cv=cv2.resize(img_cv,(512,512), interpolation=cv2.INTER_LANCZOS4)
    img_cv=np.float32(img_cv/255)

    img_cv=np.reshape(img_cv,(1,512,512,1))
    prediction=model.predict(img_cv)
    predicted=prediction[0]
    predicted_rgb = np.expand_dims(predicted, axis=-1)
    plt.imsave("predict.png",predicted_rgb)
    
    predict1 = cv2.resize(predicted, (img.shape[1], img.shape[0]), interpolation=cv2.INTER_LANCZOS4)

    mask = np.uint8(predict1 * 255)
    _, mask = cv2.threshold(mask, thresh=255/2, maxval=255, type=cv2.THRESH_BINARY)
    cnts, hierarchy = cv2.findContours(mask, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
    img = cv2.drawContours(img, cnts, -1, (0, 0, 255), 2)
    
    decay_masks = detect_decays_static_th(img, mask)
    mask = np.uint8(decay_mask * 255)
    _, mask = cv2.threshold(mask, thresh=255/2, maxval=255, type=cv2.THRESH_BINARY)
    cnts, hierarchy = cv2.findContours(mask, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
    img = cv2.fillPoly(img, cnts, (255, 0, 0))
    
    if img is not None :      
        st.subheader("Predicted teeth shape + caries zones")  
        st.write(img.shape)
        st.image(img,width=1100)

    if image.shape[1] < 3000:
        image = cv2.resize(image,(3100,1150),interpolation=cv2.INTER_LANCZOS4)
    predicted=cv2.imread("predict.png")
    predicted = cv2.resize(predicted, (image.shape[1],image.shape[0]), interpolation=cv2.INTER_LANCZOS4)
    cca_result,teeth_count=CCA_Analysis(image,predicted,3,2)

    if cca_result is not None :      
        st.subheader("Seperate predicted teeth")  
        st.write(cca_result.shape)
        st.image(cca_result,width=1100)

    st.text("Teeth Count = " + str(teeth_count))

    st.text("DONE ! ....")