請問如何做出wavelet三階轉換與反轉換呢?
由於本人是個程式很弱，這也是拿別人的code來改而已，懇請各位該如何修改呢
以下程式碼是做出一階小波轉換的source code
由於window player無法開啟輸出的圖檔 所以我用im player去開啟
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include "wavelet_program.h"
typedef long UINT32;//4bytes
typedef unsigned short int UINT16;//2bytes
typedef unsigned char BYTE;//1byte
/*float 4byte*/
#define HEADER_SIZE 14
#define INFO_SIZE 40
#define DataSize(bmp) (bmp->width*bmp->height)
//結構BMP 宣告變數區
typedef struct BMP {
BYTE header[HEADER_SIZE];
BYTE info[INFO_SIZE];
// Header
UINT16 signature; // Magic Number = "BM" = 0x4D42
UINT32 fileSize; // File size in bytes //imagesize+headersize+infosize
UINT32 hreserved; // unused (=0)
UINT32 dataOffset; // File offset to Raster Data
// InfoHeader
UINT32 size; // Size of InfoHeader =40
UINT32 width; // Bitmap Width
UINT16 height; // Bitmap Height
UINT16 planes; // Number of Planes (=1)
UINT16 bitsPerPixel; // Bits per Pixel, 1, 4, 8, 16, 24
UINT32 compression; // Type of Compression, 0 = BI_RGB no compression, 1 = BI_RLE8 8bit RLE encoding, 2 = BI_RLE4 4bit RLE encoding
UINT32 imageSize; // (compressed) Size of Image, It is valid to set this =0 if Compression = 0
UINT32 xPixelsPerM; // horizontal resolution: Pixels/meter
UINT32 yPixelsPerM; // vertical resolution: Pixels/meter
UINT32 colorsUsed; // Number of actually used colors
UINT32 colorsImportant; // Number of important colors , 0 = all
// ColorTable : present only if Info.BitsPerPixel <= 8 colors should be ordered by importance
BYTE blue; // Blue intensity
BYTE green; // Green intensity
BYTE red; // Red intensity
BYTE creserved; // unused (=0)
// Raster Data
BYTE *data;
} BMP;
typedef struct Pixel {
BYTE R;
BYTE G;
BYTE B;
} Pixel;
#define U16(x) ((unsigned short) (x))
#define U32(x) ((int) (x))
#define B2U16(bytes,offset) (U16(bytes[offset]) | U16(bytes[offset+1]) << 8)
#define B2U32(bytes,offset) (U32(bytes[offset]) | U32(bytes[offset+1]) << 8 | \
U32(bytes[offset+2]) << 16 | U32(bytes[offset+3]) << 24)
void bmpLoad(BMP *bmp, char *filename) {
FILE *file;
BYTE header[14];
BYTE info[40];
//讀取影像檔
if ((file = fopen(filename, "rb") ) == NULL ) {
fprintf(stderr, "Error: bmpLoad(), File open fail!\n");
}
else
//讀取 filename進file
fread(header, 1, HEADER_SIZE, file);
fread(info, 1, INFO_SIZE, file);
memcpy(bmp->header, header, HEADER_SIZE);
memcpy(bmp->info, info, INFO_SIZE);
// Header
bmp->signature = B2U16(header,0); assert(bmp->signature == 0x4D42);
bmp->fileSize = B2U32(header,2);
bmp->dataOffset = B2U32(header,10);
// InfoHeader
bmp->size = B2U32(info,0); assert(bmp->size==40);
bmp->width = B2U32(info,4);
bmp->height = B2U32(info,8);
bmp->planes = B2U16(info,12); assert(bmp->planes==1);
bmp->bitsPerPixel = B2U16(info,14); assert(bmp->bitsPerPixel==8);
bmp->compression = B2U32(info,16);
bmp->imageSize = B2U32(info,20);
bmp->xPixelsPerM = B2U32(info,24);
bmp->yPixelsPerM = B2U32(info,28);
bmp->colorsUsed = B2U32(info,32);
bmp->colorsImportant = B2U32(info,36);
bmp->data = (BYTE*)malloc(DataSize(bmp));//malloc size
fseek(file, bmp->dataOffset, SEEK_SET);
fread((bmp->data), 1, DataSize(bmp), file);//file寫入bmp->data
fclose(file);
}
void bmpPrint(BMP *bmp) {
printf("==== Header ====\n");
printf("Signature = %04X\n", bmp->signature); // 0x4d42 = BM
printf("FileSize = %ld \n", bmp->fileSize);
printf("DataOffset = %ld \n", bmp->dataOffset);
printf("==== Info ======\n");
printf("size = %ld \n", bmp->size);
printf("Width = %ld \n", bmp->width);
printf("Height = %ld \n", bmp->height);
printf("Planes = %d \n", bmp->planes);
printf("BitsPerPixel = %d \n", bmp->bitsPerPixel);
printf("Compression = %ld \n", bmp->compression);
printf("ImageSize = %ld \n", bmp->imageSize);
printf("XpixelsPerM = %ld \n", bmp->xPixelsPerM);
printf("YpixelsPerM = %ld \n", bmp->yPixelsPerM);
printf("ColorsUsed = %ld \n", bmp->colorsUsed);
printf("ColorsImportant = %ld \n", bmp->colorsImportant);
}
void bmpSetPixel(BMP *bmp, int x, int y, BYTE R, BYTE G, BYTE B) {
Pixel *pixel;
int idx = y * bmp->width + x;
pixel = (Pixel*) &bmp->data[idx * sizeof(Pixel)];//pixel一點即帶RGB三數據，RGB資訊進入data
pixel->R = R;
pixel->G = G;
pixel->B = B;
}
void bmpSetBox(BMP *bmp, int x, int y, int w, int h, BYTE R, BYTE G, BYTE B) {
int i,j;
for (i=0; i< 0+w; i++)
for (j=0; j<h; j++)
bmpSetPixel(bmp, x+i, y+j, R, G, B);//一點一點儲存RGB資訊進去bmpsetpixel
}
int bmpSave(BMP *bmp, char *fileout, unsigned char *wavetrans) {
FILE *file;
//寫入影像檔
if ((file = fopen(fileout, "wb") ) == NULL ) {
fprintf(stderr, "Error: bmpSave(), File create fail!\n");
exit(0);
}//fileout存到file裡
/* fwrite(bmp->header, 1, HEADER_SIZE, file);
fwrite(bmp->info, 1, INFO_SIZE, file);
fseek(file, bmp->dataOffset, SEEK_SET);*/
fwrite(wavetrans, sizeof(unsigned char), DataSize(bmp), file);//wavetrans寫入file
fclose(file);
}
void onetotwo(BMP* bmp, char* filename, BYTE** wavein)
{
FILE *file;
unsigned char *bmptrans;
bmptrans= new unsigned char[bmp->width*bmp->height];
if ((file = fopen(filename, "rb") ) == NULL ) {
fprintf(stderr, "error!");
exit(0);
}
else
fseek(file, bmp->dataOffset, SEEK_SET);
fread(bmptrans, 1, DataSize(bmp), file);
for(int j=0;j<bmp->height;j++)
for(int i=0;i<bmp->width;i++)
wavein[j]
=bmptrans[j*bmp->width+i];
fclose(file);
}
void twotoone(BMP* bmp, BYTE** waveout, unsigned char *wavetrans)
{
for(int j=0;j<bmp->height;j++)
for(int i=0;i<bmp->width;i++)
{
if(waveout[j]>255) wavetrans[j*bmp->width+i]=255;
else if(waveout[j]<0) wavetrans[j*bmp->height+i]=0;
else
wavetrans[j*bmp->height+i]=waveout[j];
}
return;
}
int main( int argc, char *argv[]) {
BMP bmp;
Pixel pixel;
char *filename="lenagray.bmp";//input
char *fileout="lenaout.bmp";//output
BYTE** wavehalf;
BYTE** waveout;
BYTE** wavein;
unsigned char *wavetrans;
unsigned char *bmptrans;
bmpLoad(&bmp, filename);
bmpSetBox(&bmp, 0, 0, 20, 20, 0x66, 0x33, 0x99);//RGB形成
wavein=new BYTE*[bmp.width];
for(int i =0;i<bmp.width;i++)
wavein=new BYTE[bmp.height];
onetotwo( &bmp, filename, wavein);
/* pixel= new BYTE **[pixel.R];
for (int i = 0; i < pixel.R; i++) {
pixel = new BYTE *[pixel.G];
for (int j = 0; j < pixel.G; j++) {
pixel[j] = new BYTE[pixel.B];
}
}*/
wavehalf=new BYTE*[(bmp.width)];
for(int i=0; i<bmp.width;i++)
wavehalf=new BYTE[bmp.height];
waveout=new BYTE*[(bmp.width)];
for(int i=0; i<bmp.width;i++)
waveout=new BYTE[bmp.height];
wavetrans= new unsigned char [bmp.height*bmp.width];
transrows(wavehalf,wavein ,bmp.width ,bmp.height);
transcols(waveout, wavehalf, bmp.width, bmp.height);
bmpPrint(&bmp);
twotoone(&bmp,waveout,wavetrans);
system("pause");
bmpSave(&bmp, fileout, wavetrans);//儲存
return 0;
}
wavelet_program.cpp 與 wavelet_program.h，由於文章長度限制這邊就不加進來了
wavelet_program.cpp當中包含了synthrows 和synthcols(BYTE** dest, BYTE** sour, unsigned int w, unsigned int h)。
