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powervision.py
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powervision.py
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from netlistbuilder import NetList
import cv2
import numpy as np
import matplotlib.pyplot as plt
from skimage import morphology
import os
import tensorflow as tf
import sys
import re
# ------------------------ Step 1: Image processing -----------------
# Image resizing helper function
def image_resize(image, width = None, height = None, inter = cv2.INTER_AREA):
# initialize the dimensions of the image to be resized and
# grab the image size
dim = None
(h, w) = image.shape[:2]
# if both the width and height are None, then return the
# original image
if width is None and height is None:
return image
# check to see if the width is None
if width is None:
# calculate the ratio of the height and construct the
# dimensions
r = height / float(h)
dim = (int(w * r), height)
# otherwise, the height is None
else:
# calculate the ratio of the width and construct the
# dimensions
r = width / float(w)
dim = (width, int(h * r))
# resize the image
resized = cv2.resize(image, dim, interpolation = inter)
# return the resized image
return resized
# Main image processing method
def img_proc(leimg):
# Read image and add a border to center the image
img = cv2.imread(leimg)
_, w_clean, _ = img.shape
img_padding = cv2.copyMakeBorder(img, int(w_clean/10), int(w_clean/10), int(w_clean/10), int(w_clean/10), cv2.BORDER_CONSTANT, value=[255, 255, 255])
img_raw = cv2.cvtColor(img_padding, cv2.COLOR_BGR2GRAY)
# Resize the image so every incoming image has a constant size
img_resize = image_resize(img_raw, width = 2000)
BLOCK = 81
C = 1
img_blur = cv2.GaussianBlur(img_resize,(5,5),0)
img_clear = cv2.medianBlur(img_blur, 3)
img_tres = cv2.adaptiveThreshold(img_clear,255,
cv2.ADAPTIVE_THRESH_GAUSSIAN_C,
cv2.THRESH_BINARY,BLOCK,C)
# markdown Inversion and skeletonization
kernel = np.ones((5, 5), np.uint8)
img_thick = cv2.erode(img_tres, kernel, iterations=1)
# normalizing thresholded image
img_norm = cv2.bitwise_not(img_thick)/255
# Uncomment both lines to see the image
# Image must be closed for program to continue
# plt.imshow(img_norm)
# plt.show()
return img_norm, img_tres
# ------------------ Step 2: Identifying Components -----------------
# Detecting components helper function
def detect_components(img_skel, SE):
kernel_close = cv2.getStructuringElement(cv2.MORPH_ELLIPSE,(SE,SE))
img_skel.dtype = 'uint8'
img_close = np.copy(img_skel)
img_close = cv2.morphologyEx(img_close, cv2.MORPH_CLOSE, kernel_close, iterations=1)
kernel_erode = np.ones((3,3),np.uint8)
img_blob = cv2.morphologyEx(img_close,cv2.MORPH_OPEN, kernel_erode,iterations=1)
contours, _ = cv2.findContours(img_blob, cv2.RETR_TREE,cv2.CHAIN_APPROX_SIMPLE)
components = []
for _, c in enumerate(contours):
x, y, w, h = cv2.boundingRect(c)
# threshold for 50x50 structuring element
if(w > SE or h > SE):
components.append(np.array((y, h, x, w)))
return components
def cleancomp(components, SE):
for i, comp1 in enumerate(components):
for j, comp2 in enumerate(components[(i+1):]):
y1,h1,x1,w1 = comp1
y2,h2,x2,w2 = comp2
yc1 = y1+h1//2
xc1 = x1+w1//2
yc2 = y2+h2//2
xc2 = x2+w2//2
dist = np.abs(xc2-xc1) + np.abs(yc2-yc1)
if dist < SE*2:
ycn = (yc1+yc2)//2
xcn = (xc1+xc2)//2
dim = (h1+h2+w1+w2)//2
components[i]=np.array((ycn-dim//2, dim, xcn-dim//2, dim))
components.pop(i+j+1)
return components
# Main image finding method
def find_all(img_norm):
# morphological skeletonization
img_skel = morphology.skeletonize(img_norm)
#img_skel is the new core image for processing, normalized
SF = np.sum(img_skel == 1)/10000
SE = int(50/SF)
# Find the components
components = detect_components(img_skel, SE)
# drawing bounding boxes around blobs
img_boxes = cv2.cvtColor(img_skel*255,cv2.COLOR_GRAY2BGR)
for comp in components:
y,h,x,w = comp
cv2.rectangle(img_boxes, (x,y),(x+w,y+h), (0,255,0),2)
clean_comp = cleancomp(components, SE)
img_boxes = cv2.cvtColor(img_skel*255,cv2.COLOR_GRAY2BGR)
for comp in clean_comp:
y,h,x,w = comp
cv2.rectangle(img_boxes, (x,y),(x+w,y+h), (0,255,0),2)
# Uncomment both lines to see the image
# Image must be closed for program to continue
# plt.imshow(img_boxes)
# plt.show()
return img_skel, components
# ------------------ Step 3: CNN ------------------------------------
# Helper function to initialize/load CNN
def init_model(MODEL_PATH):
model = tf.keras.models.load_model(MODEL_PATH)
return model
def v_h(img):
return 0
# Helper function that determines the orientation of a component
# Returns north (n), south (s), east (e), or west (w)
# Direction indicates how pins 1 and 2 will be read, where "1" is our arrow
# Ex: A diode facing east will look like --|<--
# Ex: A voltage source facing west will look like --(+ -)--
# Ex: A diode facing north will actually point down
# Ex: A voltage source facing south will have its "-" port on top
def get_orientation(device, img, focus):
ys,hs,xs,ws = focus
crop = img[(ys):(hs), (xs):(ws)]
h, w = crop.shape
# top, right, bottom, left
TOP = 0
RIGHT = 1
BOTTOM = 2
LEFT = 3
con = [0, 0, 0, 0]
for i in range(h):
if (crop[i, 0] > 0):
con[LEFT] = 1
if (crop[i, w-1] > 0):
con[RIGHT] = 1
for i in range(w):
if (crop[0, i] > 0):
con[TOP] = 1
if (crop[h-1, i] > 0):
con[BOTTOM] = 1
# First do the components that have polarity
if ((device == 'swi_ideal') or (device == 'swi_real')):
comp = 'M'
if (con[TOP]+con[BOTTOM]+con[LEFT]+con[RIGHT] == 3):
x = con.index(0)
if (x == RIGHT):
direction = 'n'
elif (x == BOTTOM):
direction = 'e'
elif (x == TOP):
direction = 'w'
else:
direction = 's'
else:
if ((con[TOP] == 1) and (con[BOTTOM] == 1)):
direction = 'n'
elif ((con[LEFT] == 1) and (con[RIGHT] == 1)):
direction = 'w'
elif (device == 'battery'):
# Sweep the image column by column
# Once you hit some pixels, note the h location
# of the pixels, because that denotes the longer leg
# of the battery.
comp = 'V'
if ((con[TOP] == 1) and (con[BOTTOM] == 1)):
for i in range(w):
running_sum = 0
for j in range(h):
running_sum += crop[j, i]/255
if (running_sum > 10):
if (j < h/2):
direction = 'n'
else:
direction = 's'
break
elif ((con[LEFT] == 1) and (con[RIGHT] == 1)):
for i in range(h):
running_sum = 0
for j in range(w):
running_sum += crop[i, j]/255
if (running_sum > 10):
if (j < w/2):
direction = 'w'
else:
direction = 'e'
break
elif (device == 'volt_src'):
# Find the centroid of the image and see whether
# that lies above or below the center
# The extra pixels of the "+" vs the "-"
# will force the centroid to move, determining its
# orientation.
comp = 'V'
if ((con[TOP] == 1) and (con[BOTTOM] == 1)):
top_half = crop[0:(((int)(h/2))-1), (0):(w-1)]
bottom_half = crop[(((int)(h/2))):(h-1), (0):(w-1)]
th = np.sum(top_half == 1)
bh = np.sum(bottom_half == 1)
if (th < bh):
direction = 's'
else:
direction = 'n'
elif ((con[LEFT] == 1) and (con[RIGHT] == 1)):
left_half = crop[(0):(h-1), (0):(((int)(w/2))-1)]
right_half = crop[(0):(h-1), (((int)(w/2))):(w-1)]
lh = np.sum(left_half == 1)
rh = np.sum(right_half == 1)
if (lh < rh):
direction = 'e'
else:
direction = 'w'
elif (device == 'curr_src'):
# Same method as voltage source
comp = 'I'
if ((con[TOP] == 1) and (con[BOTTOM] == 1)):
top_half = crop[0:(((int)(h/2))-1), (0):(w-1)]
bottom_half = crop[(((int)(h/2))):(h-1), (0):(w-1)]
th = np.sum(top_half == 1)
bh = np.sum(bottom_half == 1)
if (th < bh):
direction = 'n'
else:
direction = 's'
elif ((con[LEFT] == 1) and (con[RIGHT] == 1)):
left_half = crop[(0):(h-1), (0):(((int)(w/2))-1)]
right_half = crop[(0):(h-1), (((int)(w/2))):(w-1)]
lh = np.sum(left_half == 1)
rh = np.sum(right_half == 1)
if (lh < rh):
direction = 'w'
else:
direction = 'e'
elif (device == 'diode'):
# Break up image of diode into columns and add up
# all the pixels in that column.
# Then do a line of best fit on that data.
# Since diodes are triangular, the sum of pixels
# in the columns will tend to either increase or decrease.
# The sign of the slope will tell us which direction
# the diode is facing
comp = 'D'
data = []
if ((con[TOP] == 1) and (con[BOTTOM] == 1)):
for i in range(0, h, (int)(h/4)):
running_sum = 0
for j in range(w):
running_sum += crop[i, j]/255
data.append(running_sum)
t = list(range(0, len(data)))
m, _ = np.polyfit(np.array(t), np.array(data), 1)
if (m > 0):
direction = 's'
else:
direction = 'n'
elif ((con[LEFT] == 1) and (con[RIGHT] == 1)):
for i in range(0, w, (int)(w/4)):
running_sum = 0
for j in range(h):
running_sum += crop[j, i]/255
data.append(running_sum)
t = list(range(0, len(data)))
m, _ = np.polyfit(np.array(t), np.array(data), 1)
if (m > 0):
direction = 'w'
else:
direction = 'e'
elif (device == 'xformer'):
plt.imshow('error.jpg')
plt.show()
exit(-1)
# Take care of components with no polarity
else:
if (device == 'resistor'):
comp = 'R'
elif (device == 'inductor'):
comp = 'L'
elif (device == 'cap'):
comp = 'C'
else:
comp = 'X'
# If there are pixels running off the frame, note where
# and those locations will tell you the orientation.
# Since these are non-polarized, specific cardinal
# directions are not needed.
if ((con[TOP] == 1) and (con[BOTTOM] == 1)):
direction = 'n'
elif ((con[LEFT] == 1) and (con[RIGHT] == 1)):
direction = 'w'
return direction, comp
def predict_components(img_skel:np.array, components, model):
CLASS_NAMES = ['ac_src', 'battery', 'cap', 'curr_src', 'diode', 'inductor', 'resistor', 'swi_ideal', 'swi_real', 'volt_src', 'xformer']
component_list = list()
# figure out the x and y of the component place
print(components[0])
for i,_ in enumerate(components):
y,h,x,w = components[i]
y_center = y + h//2
x_center = x + w//2
dim = (h+w)//4
# expanding aspect ratio to square
square = (y_center-dim, y_center+dim, x_center-dim, x_center+dim) # expand width to size of height
# expanding aspect ratio to square
percmax = 0
for scale in range(0,100,10):
ys,hs,xs,ws = square
crop = img_skel[(ys-scale):(hs+2*scale), (xs-scale):(ws+2*scale)]
img_square = tf.keras.preprocessing.image.img_to_array(crop)
try:
img_square = cv2.resize(img_square, (64, 64))
except:
continue
#plt.imshow(img_square)
img_square = np.expand_dims(img_square, axis=0)
img_square = np.vstack([img_square])
prediction = model.predict(img_square)
perc = np.around(np.max(prediction),3)
# output of softmax -> gives class with highest probaility
if perc > percmax:
classes = np.argmax(prediction, axis=-1)
class_prediction = CLASS_NAMES[int(classes)]
percmax = perc
square = (y_center-dim-scale, y_center+dim+scale, x_center-dim-scale, x_center+dim+scale)
if percmax > 0.6:
# orientation of components, north, south, east, west
orientation, dev = get_orientation(class_prediction, img_skel, square)
component_list.append({
'type': dev,
'location' : square,
'orientation': orientation,
'confidence': percmax
})
return component_list
def classify(img_norm, img_skel, components, model_path):
# initialize CNN
model = init_model(model_path)
# Run classifier
predictions = predict_components(img_norm*255, components, model)
# Prettify everything for viewing
FONT_FACE = cv2.FONT_HERSHEY_DUPLEX
FONT_SCALE = 1
COLOR = (0,255,0)
img = cv2.cvtColor(np.copy(img_skel*255),cv2.COLOR_GRAY2BGR)
for comp in predictions:
y,h,x,w = comp['location']
img_overlay = np.ones_like(img[y:h,x:w])*255
cv2.rectangle(img_overlay, (0, 0), (w, h), (0, 255, 0), -1)
cv2.rectangle(img, (x, y), (w, h), (0, 255, 0), 2)
img[y:h,x:w] = cv2.addWeighted(img[y:h,x:w], 1, img_overlay, 0.1, 0)
# get predicted label for component
component = comp['type']
orientation = comp['orientation']
# add labels above bounding boxes
cv2.putText(img, f'{component},{orientation}', (x, y-12), FONT_FACE, FONT_SCALE, COLOR, 1)
# Uncomment both lines to see the image
# Image must be closed for program to continue
plt.imshow(img)
plt.show()
return predictions
# ------------------------ Step 4: Identify nodes -------------------
# Finds and visualizes nodes
def node_detect(img_tres, predictions):
img_nodes = np.copy(cv2.bitwise_not(img_tres))
for _,square in enumerate(predictions):
y,h,x,w = square['location']
cv2.rectangle(img_nodes, (x,y),(w,h), 0, -1)
SE_dilate = 20
kernel_dilate = cv2.getStructuringElement(cv2.MORPH_ELLIPSE,
(SE_dilate, SE_dilate))
img_nodes_dilate = cv2.dilate(img_nodes, kernel_dilate, 1)
img_nodes_rect = cv2.cvtColor(img_nodes_dilate, cv2.COLOR_GRAY2BGR)
PADDING = 10
for _,square in enumerate(predictions):
y,h,x,w = square['location']
cv2.rectangle(img_nodes_rect,
(x-PADDING,y-PADDING),(w+PADDING,h+PADDING),
(0,255,0), 2)
img_nodes = cv2.cvtColor(img_nodes,cv2.COLOR_GRAY2BGR)
# Uncomment both lines to see the image
# Image must be closed for program to continue
# plt.imshow(img_nodes_rect)
# plt.show()
return img_nodes_dilate
# -----------------Step 5: Generate netlist matrix ------------------
# Detects contour intersection
def contourIntersect(original_image, contour1, contour2):
# Two separate contours trying to check intersection on
contours = [contour1, contour2]
h, w = original_image.shape
# Create image filled with zeros the same size of original image
blank = np.zeros(original_image.shape[0:2])
# Copy each contour into its own image and fill it with '1'
image1 = cv2.drawContours(blank.copy(), contours, 0, 1, -1)
image2 = cv2.drawContours(blank.copy(), contours, 1, 1, -1)
# Use the logical AND operation on the two images
# Since the two images had bitwise and applied to it,
# there should be a '1' or 'True' where there was intersection
# and a '0' or 'False' where it didnt intersect
intersection = np.logical_and(image1, image2)
x = []
y = []
avg_x = 0
avg_y = 0
check = intersection.any()
if (check):
for i in range(h):
for j in range(w):
if (intersection[i,j]):
x.append(j)
y.append(i)
avg_x = (sum(x)/len(x))
avg_y = (sum(y)/len(y))
# Check if there was a '1' in the intersection
return check, avg_y, avg_x
# Helper function to ensure connection to correct pin
def identify_num(device, cntr_h, cntr_w):
EPSILON = 30
driver_needed = 0
TOP = 0
RIGHT = 1
BOTTOM = 2
LEFT = 3
pins = [0, 0, 0, 0]
y, h, x, w = device["location"]
orientation = device["orientation"]
num = 0
if (device["type"] == 'M'):
driver_needed = 1
if ((cntr_h < (y+EPSILON))):
pins[TOP] = 1
elif((cntr_h > (h-EPSILON))):
pins[BOTTOM] = 1
elif((cntr_w < (x+EPSILON))):
pins[LEFT] = 1
elif((cntr_w > (w-EPSILON))):
pins[RIGHT] = 1
if (orientation == 'n'):
if(pins[TOP] == 1):
num = 1
elif(pins[BOTTOM] == 1):
num = 2
elif (orientation == 's'):
if(pins[TOP] == 1):
num = 2
elif(pins[BOTTOM] == 1):
num = 1
elif (orientation == 'w'):
if(pins[LEFT] == 1):
num = 1
elif(pins[RIGHT] == 1):
num = 2
elif (orientation == 'e'):
if(pins[LEFT] == 1):
num = 2
elif(pins[RIGHT] == 1):
num = 1
if ((driver_needed == 1) and (num == 2)):
num = 3
return num, driver_needed
# Helper function that converts square drawn around detected component to contour
def square2contour(square : tuple):
y,h,x,w = square
comp_contour = np.asarray([[[x, y]], [[x, h]], [[w, h]], [[w, y]], [[x,y]]])
return comp_contour
# Main function that generates the netlist matrix
def matrix_gen(img_nodes_dilate, predictions, img_norm):
node_contours, _ = cv2.findContours(img_nodes_dilate, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
# Device list
dev = []
incimatrix = np.zeros((len(predictions),len(node_contours)+1))
for i, comp in enumerate(predictions):
dev.append(comp["type"])
for j, node in enumerate(node_contours):
valid, h1, w1 = contourIntersect(img_norm, node, square2contour(comp["location"]))
if valid:
num, add_driver = identify_num(comp, h1, w1)
incimatrix[i][j] = num
if (add_driver):
incimatrix[i][len(node_contours)] = 2
# nodes that needs to be removed
nodesum = incimatrix.sum(axis=0)
voidnode = []
for j, node in enumerate(node_contours):
if nodesum[j] < 2:
voidnode.append(j)
# clean up incident matrix and node contours
incimatrix = np.delete(incimatrix, voidnode, axis=1)
return incimatrix, dev
# ------------------------- Misc. -------------------------------
def sentence_process(sentence):
# Delay, offtime, period
DELAY = 0
OFFTIME = 1
PERIOD = 2
period = -1
duty = -1
parameters = ["0", "3u", "10u"]
sentence = sentence.lower()
nums = re.findall(r'\d+\.\d+|\d+', sentence)
for i in range(len(nums)):
thing = sentence.split(nums[i])
thing = thing[1].split(' ')
thing = thing[0].split(',')[0]
if (thing.find('hz') > -1):
prefix = thing.split('hz')[0]
if (prefix == 'k'):
period = round(1000.0/((float)(nums[i])), 5)
elif (prefix == 'm'):
period = round(1.0/((float)(nums[i])), 5)
else:
print("Sorry, I'm afraid I don't understand.")
exit(-1)
elif (thing.find('%') > -1):
duty = (100.0-((float)(nums[i])))/100.0
else:
parameters[DELAY] = thing.split(' ')[0].split(', ')[0]
if ((period < 0) or (duty < 0)):
print("Not enough information, aborting...")
exit(-1)
parameters[PERIOD] = str(period) + 'u'
parameters[OFFTIME] = str(duty*period) + 'u'
return parameters
# Main function
def main():
# Prompt user for schematic
leimg = input("What schematic would you like to analyze? Make sure to enter the whole path (if available) and file name (ex. sch/file.png): ")
while not os.path.isfile(leimg):
print("Sorry, I could not find the file, please try again.\n")
leimg = input("What schematic would you like to analyze? ")
# Step 1
img, thres = img_proc(leimg)
# Step 2
skel, comp = find_all(img)
# Step 3
pre = classify(img, skel, comp, '10_categories')
# Step 4
nodes = node_detect(thres, pre)
# Step 5
wiring_matrix, comp_matrix = matrix_gen(nodes, pre, img)
wiring_matrix = wiring_matrix.tolist()
# Prompt user to set simulation parameters
if (comp_matrix.count('M') > 0):
print("I see that you have MOSFETs in this circuit, please tell me how you want to drive them.")
print("Please specify duty cycle (Ex: 50%), frequency (Ex: 1khz or 5Mhz), and phase shift (in sec: 5n, 3m, etc. You can also specify nothing if no phase shift) for each MOSFET that is shown.")
print("Close out each picture before proceeding.")
in_d = 'n'
while(in_d == 'n'):
in_d = input("Ready (y/n)? ")
param = []
for comp in pre:
img_copy = skel.copy()
if (comp['type'] == 'M'):
y,h,x,w = comp['location']
img_overlay = np.ones_like(img[y:h,x:w])*255
cv2.rectangle(img_overlay, (0, 0), (w, h), (0, 255, 0), -1)
cv2.rectangle(img_copy, (x, y), (w, h), (0, 255, 0), 2)
img_copy[y:h,x:w] = cv2.addWeighted(img[y:h,x:w], 1, img_overlay, 0.1, 0)
plt.imshow(img_copy)
plt.show()
specs = input("How do you want to drive this MOSFET (Ex: I want to drive it at 100khz, 50%, 0n)? ")
param.append(sentence_process(specs))
time = input("How long do you want to run the simulation for (Ex: 5m)? ")
# Step 6
net = NetList(leimg.split('.')[0].split('/')[-1])
net.generate(wiring_matrix, comp_matrix, param, time)
# Step 7
print("Now plotting input voltage and output voltage...")
net.run()
net.plot()
if __name__ == '__main__':
sys.exit(main())