CODEWITHSUNDEEP
matlabimage-processingimage-segmentationhandwriting
user2339198
user2339198

Reputation: 67

Separating hand written numbers on a squared paper form its background

I am new in matlab and I am trying to write a code that can separate hand written numbers form a squared page background. I have tried using kmeans to differ the numbers from the lines and the squers , but it doesn’t work on all images . Any ideas how can I do it? Tahnks!

Upvotes: 1

Views: 388

Answers (1)

Omar Wagih
Omar Wagih

Reputation: 8742

I'm using the EBImage package in R, but I'm sure you can find the equivilent in matlab:

Starting with the original image: enter image description here

# Read and extract greyscale image 
# Run kmeans with 3 centers 
km = kmeans(as.vector(x), 3)
c = km$centers

# 1 0.4936797
# 2 0.2841005
# 3 0.6456494

# Extract smallest cluster 2 (your numbers) as binary image
t = (km$cluster==2)
r = matrix(t, nrow(x))

r now looks like:

enter image description here

# Apply morphological opening (erode then dilate) with smallest possible structural element
kern = makeBrush(3, 'box')

#[,1] [,2] [,3]
#[1,]    1    1    1
#[2,]    1    1    1
#[3,]    1    1    1

z = openingGreyScale(r, kern)

z now looks like

enter image description here

Upvotes: 2

Related Questions