Character Recognition Example (III):Training a Simple NN for classification: edu_imgcrop(bw) - File Exchange

Code covered by the BSD License

Highlights from
Character Recognition Example (III):Training a Simple NN for classification

charGUI(varargin) CHARGUI M-file for charGUI.fig
charGUI2(varargin) CHARGUI2 M-file for charGUI2.fig
rearrangeCharGUI.m Rearranging CHARGUI to Make it Resizable and Dockable
edu_createnn(P,T)
edu_imgcrop(bw) Find the boundary of the image
edu_imgpreprocess(I) Extra lines compare to example2 to extract all the components into an
edu_imgresize(bw2) This function will take the cropped binary image and change it to 5 x 7
char1.m
char2.m
char3.m
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from Character Recognition Example (III):Training a Simple NN for classification by Tan Chin Luh
This demo shows some examples for image pre-processing before the recognition stage.

edu_imgcrop(bw)

function bw2 = edu_imgcrop(bw)

% Find the boundary of the image
[y2temp x2temp] = size(bw);
x1=1;
y1=1;
x2=x2temp;
y2=y2temp;

% Finding left side blank spaces
cntB=1;
while (sum(bw(:,cntB))==y2temp)
    x1=x1+1;
    cntB=cntB+1;
end

% Finding right side blank spaces
cntB=1;
while (sum(bw(cntB,:))==x2temp)
    y1=y1+1;
    cntB=cntB+1;
end

% Finding upper side blank spaces
cntB=x2temp;
while (sum(bw(:,cntB))==y2temp)
    x2=x2-1;
    cntB=cntB-1;
end

% Finding lower side blank spaces
cntB=y2temp;
while (sum(bw(cntB,:))==x2temp)
    y2=y2-1;
    cntB=cntB-1;
end

% Crop the image to the edge
bw2=imcrop(bw,[x1,y1,(x2-x1),(y2-y1)]);

Highlights from Character Recognition Example (III):Training a Simple NN for classification

Highlights from
Character Recognition Example (III):Training a Simple NN for classification