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working towards actually doing edge detection

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git-svn-id: svn://anubis/gvsu@205 45c1a28c-8058-47b2-ae61-ca45b979098e
This commit is contained in:
josh 2008-10-21 01:38:54 +00:00
parent e8baf24c7e
commit ba89e56e44
1 changed files with 37 additions and 18 deletions
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55
cs677/pa3/edge-detect.cc
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@ -5,6 +5,10 @@
#include "BMP.h" #include "BMP.h"
using namespace std; using namespace std;
void usage(const char * progName);
void squashAndPadData(unsigned char * raw_data, unsigned char * padded_data,
int width, int height);
void usage(const char * progName) void usage(const char * progName)
{ {
cout << "Usage: " << progName << " [options] <input-BMP-file>" << endl; cout << "Usage: " << progName << " [options] <input-BMP-file>" << endl;
@ -20,9 +24,6 @@ int main(int argc, char * argv[])
string outputFileName; string outputFileName;
unsigned int threshold_level = 60; unsigned int threshold_level = 60;
if (argc < 2)
usage(argv[0]);
for (argi = 0; argi < argc; argi++) for (argi = 0; argi < argc; argi++)
{ {
if (!strcmp(argv[argi], "-l")) if (!strcmp(argv[argi], "-l"))
@ -40,23 +41,41 @@ int main(int argc, char * argv[])
} }
} }
if (inputFileName == "")
usage(argv[0]);
BMP inputImage(inputFileName.c_str()); BMP inputImage(inputFileName.c_str());
unsigned char * data = int width = inputImage.getWidth();
new unsigned char[inputImage.getWidth() * inputImage.getHeight() * 3]; int height = inputImage.getHeight();
inputImage.read(data); int num_pixels = width * height;
unsigned char * bmp_data =
new unsigned char[num_pixels * 3];
inputImage.read(bmp_data);
unsigned char * data_ptr = data; unsigned char * padded_data =
for (int i = 0; i < inputImage.getWidth() * inputImage.getHeight(); i++) new unsigned char[(width + 2) * (height + 2)];
{ squashAndPadData(bmp_data, padded_data, width, height);
*data_ptr++ = 0; delete[] bmp_data;
*data_ptr++ = 0;
data_ptr++;
}
BMP edges(outputFileName.c_str(), delete[] padded_data;
inputImage.getWidth(),
inputImage.getHeight(),
data);
delete[] data;
} }
void squashAndPadData(unsigned char * raw_data, unsigned char * padded_data,
int width, int height)
{
for (int i = 0; i < width + 2; i++)
*padded_data++ = 0;
for (int i = 0; i < height; i++)
{
*padded_data++ = 0;
for (int j = 0; j < width; j++)
{
*padded_data++ = (raw_data[0] + raw_data[1] + raw_data[2]) / 3;
raw_data += 3;
}
*padded_data++ = 0;
}
for (int i = 0; i < width + 2; i++)
*padded_data++ = 0;
}