Question#3c

Big T 7pi/4
Octave Command
bigT=255*ones(256);
bigT(30:79,64:191)=zeros(50,128);
bigT(50:199,111:146)=zeros(150, 36);
for x = 1:256
for y = 1:256
newy=rem(2*x+y,256)+1;
bigTskew(x,y)=bigT(x,newy);
end;
end;
for x=1:256;
for y=1:256;
bigTskewrotate(x,y)=bigTskew(mod(round(x*cos(7*pi/4)-y*sin(7*pi/4)),256)+1, mod(round(x*sin(7*pi/4)+y*cos(7*pi/4)),256)+1);
end;
end;
imshow(bigTskewrotate);