while True:
_,gray=cap.read()
#gray=cv2.pyrMeanShiftFiltering(gray,10,30)
gray=cv2.blur(gray,ksize=(5,5))
gray=cv2.cvtColor(gray,cv2.COLOR_BGR2GRAY)
gray=cv2.resize(gray,(300,200))
Sobel=cv2.Sobel(gray,ddepth=cv2.CV_8U,ksize=1,dx=1,dy=0)
ret,threshold=cv2.threshold(Sobel,0,255,(cv2.THRESH_OTSU+cv2.THRESH_BINARY))
k=cv2.getStructuringElement(cv2.MORPH_RECT,ksize=(30,55))
threshold=cv2.morphologyEx(threshold,cv2.MORPH_CLOSE,k)
contours,hierarchy=cv2.findContours(threshold,cv2.RETR_EXTERNAL,cv2.CHAIN_APPROX_NONE)
rect=cv2.minAreaRect(contours[0])
box=cv2.boxPoints(rect)
box=np.int0(box)
threshold=cv2.drawContours(gray,[box],-1,(0,255,255),1)
height,width=threshold.shape[:]
mask1=np.zeros((height+2,width+2),np.uint8)
cv2.floodFill(threshold,mask1,(0,0),255,flags=cv2.FLOODFILL_MASK_ONLY)
mask_inv=cv2.bitwise_not(threshold)
mask=np.zeros(threshold.shape[:-1],dtype="uint8")
screenCnt=None
for c in contours:
peri=cv2.arcLength(c,True)
approx=cv2.approxPolyDP(c,0.02*peri,True)
x,y,w,h=cv2.boundingRect(c)
print(cv2.contourArea(c))
cv2.rectangle(gray,(x,y),(x+w,y+h),(0,0,255),3)
roi=gray[y:y+h,x:x+w]
if len(approx)==4:
screenCnt=approx
break
cv2.imshow('roi',roi)
cv2.imshow('frame',gray)
cv2.imshow('sobel',Sobel)
cv2.imshow('threshold',threshold)
if cv2.waitKey(1) & 0xFF==ord('s'):
cv2.imwrite('op.jpg',roi)
elif cv2.waitKey(1) & 0xFF==ord('q'):
break
print(subprocess.call('tesseract.exe op.jpg bla.txt',shell=True))
f=open('bla.txt.txt','r')
message=f.read()
print(message)
f.close()
cap.release()
cv2.destroyAllWindows()
i have preprocessed the image and crop out the contour but tesseract gives no output saying 0 dpi..please help..thanks in advance.. i masked the contour out and tried applying tesseract ocr through shell i m getting invalid resoultion..
