Hi, im doing histogram equalization on 8-bit images of sizes 512*512 and 256*256..
Here is my code below:
Code:
 
void CLEO_MedivisionView::OnUpdateToolsHistogramequalization(CCmdUI *pCmdUI)
{
// TODO: Add your command update UI handler code here

if (fileopen)
{
pCmdUI->Enable(true);
}
else
{
pCmdUI->Enable(false);
}
}
 
void CLEO_MedivisionView::OnToolsHistogramequalization()
{
int i;
unsigned int array1[256];
unsigned int cdf[256];
unsigned int arrayhe[256];
 
 
 
//** Step 1 **\\
for (i=0;i<256;i++) 
{
array1[i]=0;
}
if (no_of_rows == 512 && no_of_cols == 512)
{
for (i=0; i<262144; i++)
{ 
array1[image[i]]++;
}
}
else if (no_of_rows == 256 && no_of_cols == 256)
{
for (i=0; i<65536; i++)
{
array1[image256[i]]++;
}
}
 
 
//** Step 2 **\\
cdf[0] = array1[i]; // finding cumulative distribution

for (i=1; i<256; i++) 
{
cdf[i] = array1[i] + cdf[i-1];
}
for (i=0;i<256;i++) // zeros out all the element in the array 
{
arrayhe[i]=0;
}
for (i=0; i<256; i++) // applying the HE algorithm
{
arrayhe[i] = (cdf[i]*255/262144)+0.5;
}
 

 
 

}
Im sure that step 1 is correct..

however when i toggle a breakpoint on cdf[i] in step 2 and when i wanted to check the values inside it and make sure its cumulative frequency compared to array1[i] which is just frequency.. When i got the values, i get random flow of number ie: '02ex47810'..

Any ideas why is this so? Thanks