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| #include <memory.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <algorithm>
#include "FreeImage.h"
double q8[8][8] = { { 4, 4, 6, 11, 24, 24, 24, 24 },
{ 4, 5, 6, 16, 24, 24, 24, 24 },
{ 6, 6, 14, 24, 24, 24, 24, 24 },
{ 11, 16, 24, 24, 24, 24, 24, 24 },
{ 24, 24, 24, 24, 24, 24, 24, 24 },
{ 24, 24, 24, 24, 24, 24, 24, 24 },
{ 24, 24, 24, 24, 24, 24, 24, 24 },
{ 24, 24, 24, 24, 24, 24, 24, 24 } };
double quality = 0.5;
int threshold = 10;
double q16[16][16];
struct position {
int i;
int x;
int y;
};
unsigned int w;
unsigned int h;
unsigned int w16;
unsigned int h16;
int * matrix;
int compare( struct position * a, struct position * b )
{
int * m_a = &matrix[ a->i * 16 * 16 ];
int * m_b = &matrix[ b->i * 16 * 16 ];
int i;
for ( i = 0; i < 16 * 16; ++i ) {
if ( m_a[i] < m_b[i] ) {
return -1;
}
if ( m_a[i] > m_b[i] ) {
return 1;
}
}
return 0;
}
int main( int argc, char * argv[] )
{
FreeImage_Initialise(TRUE);
if ( argc < 2 ) {
printf( "Usage: copymove <image file> [<quality>] [<threshold>]\n" );
return 1;
}
struct stat file_stat;
stat( argv[1], &file_stat );
int file_size = file_stat.st_size;
FILE * handle = fopen( argv[1], "r" );
BYTE * bytes = (BYTE *) malloc(file_size);
int length = fread( bytes, 1, file_size, handle );
fclose( handle );
if ( argc >= 3 ) {
quality = atof( argv[2] );
}
if ( argc >= 4 ) {
threshold = atoi( argv[3] );
}
printf( "Set quality factor %f\n", quality );
printf( "Set threshold %d\n", threshold );
FIMEMORY * memory = FreeImage_OpenMemory( bytes, length );
if ( !memory ) {
return 1;
}
FREE_IMAGE_FORMAT format = FreeImage_GetFileTypeFromMemory( memory, 0 );
FIBITMAP * bitmap = FreeImage_LoadFromMemory( format, memory, 0 );
if ( !bitmap ) {
return 1;
}
FIBITMAP * color = FreeImage_ConvertTo24Bits( bitmap );
if ( !color ) {
return 1;
}
h = FreeImage_GetHeight( color );
w = FreeImage_GetWidth( color );
h16 = h - 16 + 1;
w16 = w - 16 + 1;
printf( "Analyzing %s (%d x %d)\n", argv[1], h, w );
int i, j, a, d, x, y;
for ( i = 0; i < 8; ++i ) {
for ( j = 0; j < 8; ++j ) {
q16[i][j] = q8[i][j] * 2.5;
}
}
q16[0][0] = 2.0 * q8[0][0];
for ( i = 8; i < 16; ++i ) {
for ( j = 0; j < 8; ++j ) {
q16[i][j] = q8[0][7] * 2.5;
}
}
for ( i = 8; i < 16; ++i ) {
for ( j = 8; j < 16; ++j ) {
q16[i][j] = q8[7][7] * 2.5;
}
}
for ( i = 0; i < 8; ++i ) {
for ( j = 8; j < 16; ++j ) {
q16[i][j] = q8[7][0] * 2.5;
}
}
int bpp = FreeImage_GetBPP( color );
bpp /= 8;
double pi = 3.1415926;
int matrix_size = w16 * h16 * 16 * 16 * sizeof( int );
matrix = (int *) malloc( matrix_size );
int index_size = w16 * h16 * sizeof( struct position );
struct position * index = (position *) malloc( index_size );
memset( matrix, 0, matrix_size );
memset( index, 0, index_size );
printf( "Precomputing... " );
fflush(0);
int last_percent = 10;
int i_pos = -1;
double pre[16][16][16][16];
int u;
int v;
for ( u = 0; u < 16; ++u ) {
for ( v = 0; v < 16; ++v ) {
for ( j = 0; j < 16; ++j ) {
for ( i = 0; i < 16; ++i ) {
pre[u][v][i][j] = cos( pi / 16.0 * ( (double)i + 0.5 ) * (double)u ) *
cos( pi / 16.0 * ( (double)j + 0.5 ) * (double)v );
}
}
}
}
double sqrt_116 = sqrt(1.0/16.0);
double sqrt_216 = sqrt(2.0/16.0);
printf( "done.\nBuilding DCT transformed matrix... " );
fflush(0);
for ( size_t a = 0; a < w16; ++a ) {
for ( size_t d = 0; d < h16; ++d ) {
++i_pos;
index[i_pos].i = i_pos;
index[i_pos].x = a;
index[i_pos].y = d;
if ( ( ( 100 * ( a * h16 +d ) ) / ( w16 * h16 ) )>last_percent ) {
printf( "%d%% ", last_percent );
fflush(0);
last_percent += 10;
}
double dct[16][16];
for ( i = 0; i < 16; ++i ) {
for ( j = 0; j < 16; ++j ) {
dct[i][j] = 0;
}
}
for ( u = 0; u < 16; ++u ) {
for ( v = 0; v < 16; ++v ) {
for ( j = 0; j < 16; ++j ) {
BYTE * bits = FreeImage_GetScanLine( color, j + d );
bits += bpp * a;
for ( i = 0; i < 16; ++i ) {
double pixel = (double)bits[FI_RGBA_RED] * 0.299
+ (double)bits[FI_RGBA_GREEN] * 0.587
+ (double)bits[FI_RGBA_BLUE] * 0.114;
pixel -= 128;
pixel = floor (pixel+0.5);
dct[u][v] += pixel * pre[u][v][i][j];
bits += bpp;
}
}
}
}
for ( u = 0; u < 16; ++u ) {
for ( v = 0; v < 16; ++v ) {
dct[u][v] *= (u==0)?sqrt_116:sqrt_216;
dct[u][v] *= (v==0)?sqrt_116:sqrt_216;
dct[u][v] /= quality;
dct[u][v] /= q16[u][v];
dct[u][v] = floor( dct[u][v]+0.5 );
}
}
for ( i = 0; i < 16; ++i ) {
for ( j = 0; j < 16; ++j ) {
matrix[ i_pos * 16 * 16 + j + 16 * i ] =
(int)dct[i][j];
}
}
}
}
printf( "done\nSorting index into lexicographic order... " );
qsort( &index[0], w16 * h16, sizeof( struct position ), (void*)&compare );
printf( "done\nBuilding shift vectors... " );
fflush(0);
int * shift = (int *)malloc( sizeof( int ) * w * h * 2 );
for ( size_t i = 0; i < w; ++i ) {
for ( size_t j = 0; j < h*2; ++j ) {
shift[j * w + i] = 0;
}
}
last_percent = 10;
for ( size_t i = 0; i < w16 * h16 - 1; ++i ) {
if ( ( 100 * i / ( w16 * h16 -1 ) ) > last_percent ) {
printf( "%d%% ", last_percent );
fflush(0);
last_percent += 10;
}
if ( compare( &index[i], &index[i+1] ) == 0 ) {
int sx = index[i].x - index[i+1].x;
int sy = index[i].y - index[i+1].y;
if ( sx < 0 ) {
sx = -sx;
sy = -sy;
}
sy += h;
++shift[sy * w + sx];
}
}
printf( "done\nCreating cloned images... " );
fflush(0);
last_percent = 10;
FIBITMAP * total = FreeImage_Clone( color );
for ( i = 0; i < w; ++i ) {
for ( size_t j = 0; j < h*2; ++j ) {
if ( ( 100 * (i+j) / ( w * ( h + h ) ) ) > last_percent ) {
printf( "%d%% ", last_percent );
fflush(0);
last_percent += 10;
}
if ( ( ( i > 16 ) || ( ( abs((int)(j-h)) > 16 ) ) ) &&
( shift[j * w + i] > threshold ) ) {
printf( "Shift vector (%d,%d) has count %d\n", i, j - h,
shift[j * w + i] );
FIBITMAP * clone = FreeImage_Clone( color );
int sx = i;
int sy = j - h;
int k;
for ( size_t k = 0; k < w16 * h16 - 1; ++k ) {
if ( compare( &index[k], &index[k+1] ) == 0 ) {
int sxx = index[k].x - index[k+1].x;
int syy = index[k].y - index[k+1].y;
if ( sxx < 0 ) {
sxx = -sxx;
syy = -syy;
}
if ( sx == sxx ) {
if ( sy == syy ) {
int x;
int y;
int c;
#define max(a,b) (((a)>(b))?a:b)
#define min(a,b) (((a)<(b))?a:b)
for ( c = k; c < k+2; ++c ) {
for ( x = index[c].x; x < index[c].x + 16; ++x ) {
for ( y = index[c].y; y < index[c].y + 16; ++y ) {
RGBQUAD pixel;
FreeImage_GetPixelColor( color, x, y, &pixel );
if ( index[k].x < index[k+1].x ) {
if ( c == k ) {
pixel.rgbRed = 255;
} else {
pixel.rgbBlue = 255;
}
} else {
if ( c != k ) {
pixel.rgbRed = 255;
} else {
pixel.rgbBlue = 255;
}
}
FreeImage_SetPixelColor( clone, x, y, &pixel );
FreeImage_SetPixelColor( total, x, y, &pixel );
}
}
}
}
}
}
}
char output[1000];
sprintf( output, "%s-%d=%d.png", argv[1], i, j-h );
FreeImage_Save( FIF_PNG, clone, output, PNG_DEFAULT );
FreeImage_Unload( clone );
}
}
}
char output[1000];
sprintf( output, "%s-total.png", argv[1] );
FreeImage_Save( FIF_PNG, total, output, PNG_DEFAULT );
FreeImage_Unload( total );
FreeImage_Unload( color );
FreeImage_Unload( bitmap );
FreeImage_DeInitialise();
printf( "done\n" );
free( bytes );
free( matrix );
free( shift );
free( index );
return 0;
} |
