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| #include <stdio.h>
#include <tiffio.h>
int main(int argc, char *argv[]){
TIFF *image;
uint16 photo, bps, spp, fillorder;
uint32 width;
tsize_t stripSize;
unsigned long imageOffset, result;
int stripMax, stripCount;
char *buffer, tempbyte;
unsigned long bufferSize, count;
// Open the TIFF image
if((image = TIFFOpen(argv[1], "r")) == NULL){
fprintf(stderr, "Could not open incoming image\n");
exit(42);
}
// Check that it is of a type that we support
if((TIFFGetField(image, TIFFTAG_BITSPERSAMPLE, &bps) == 0) || (bps != 1)){
fprintf(stderr, "Either undefined or unsupported number of bits per sample\n");
exit(42);
}
if((TIFFGetField(image, TIFFTAG_SAMPLESPERPIXEL, &spp) == 0) || (spp != 1)){
fprintf(stderr, "Either undefined or unsupported number of samples per pixel\n");
exit(42);
}
// Read in the possibly multiple strips
stripSize = TIFFStripSize (image);
stripMax = TIFFNumberOfStrips (image);
imageOffset = 0;
bufferSize = TIFFNumberOfStrips (image) * stripSize;
if((buffer = (char *) malloc(bufferSize)) == NULL){
fprintf(stderr, "Could not allocate enough memory for the uncompressed image\n");
exit(42);
}
for (stripCount = 0; stripCount < stripMax; stripCount++){
if((result = TIFFReadEncodedStrip (image, stripCount,
buffer + imageOffset,
stripSize)) == -1){
fprintf(stderr, "Read error on input strip number %d\n", stripCount);
exit(42);
}
imageOffset += result;
}
// Deal with photometric interpretations
if(TIFFGetField(image, TIFFTAG_PHOTOMETRIC, &photo) == 0){
fprintf(stderr, "Image has an undefined photometric interpretation\n");
exit(42);
}
if(photo != PHOTOMETRIC_MINISWHITE){
// Flip bits
printf("Fixing the photometric interpretation\n");
for(count = 0; count < bufferSize; count++)
buffer[count] = ~buffer[count];
}
// Deal with fillorder
if(TIFFGetField(image, TIFFTAG_FILLORDER, &fillorder) == 0){
fprintf(stderr, "Image has an undefined fillorder\n");
exit(42);
}
if(fillorder != FILLORDER_MSB2LSB){
// We need to swap bits -- ABCDEFGH becomes HGFEDCBA
printf("Fixing the fillorder\n");
for(count = 0; count < bufferSize; count++){
tempbyte = 0;
if(buffer[count] & 128) tempbyte += 1;
if(buffer[count] & 64) tempbyte += 2;
if(buffer[count] & 32) tempbyte += 4;
if(buffer[count] & 16) tempbyte += 8;
if(buffer[count] & 8) tempbyte += 16;
if(buffer[count] & 4) tempbyte += 32;
if(buffer[count] & 2) tempbyte += 64;
if(buffer[count] & 1) tempbyte += 128;
buffer[count] = tempbyte;
}
}
// Do whatever it is we do with the buffer -- we dump it in hex
if(TIFFGetField(image, TIFFTAG_IMAGEWIDTH, &width) == 0){
fprintf(stderr, "Image does not define its width\n");
exit(42);
}
for(count = 0; count < bufferSize; count++){
printf("%02x", (unsigned char) buffer[count]);
if((count + 1) % (width / 8) == 0) printf("\n");
else printf(" ");
}
TIFFClose(image);
}
|
平铺图像
平铺图像不太常见，所以在本文中我将集中讨论条纹图像。请记住，单条图像只是多条图像的子集。