From 780ec463612e6a7fd61f0bd2ef029836c333922f Mon Sep 17 00:00:00 2001 From: Christian C Date: Wed, 5 Mar 2025 12:53:56 -0800 Subject: Modularize --- src/main.c | 183 +++---------------------------------------------------------- 1 file changed, 8 insertions(+), 175 deletions(-) (limited to 'src/main.c') diff --git a/src/main.c b/src/main.c index 9075dcb..02f5520 100644 --- a/src/main.c +++ b/src/main.c @@ -1,187 +1,18 @@ #include #include -#include -#include #include -#include - #include #include #include #include #include #include +#include #define OFFSET 16 -// Get full path -char* full_path(char* dir, char* file) -{ - char* fpath = NULL; - size_t dir_len = strlen(dir); - size_t file_len = strlen(file); - fpath = (char*)calloc(dir_len+file_len+2,sizeof(char)); - strcpy(fpath,dir); - strcpy(fpath+dir_len+1,file); - fpath[dir_len] = '/'; - return fpath; -} - -// Determines if file name has tif file extension -bool_t is_tif_ext(char* file_name) -{ - size_t file_len = strlen(file_name); - if ((file_name[file_len-3] == 't') && (file_name[file_len-2] == 'i') && (file_name[file_len-1] == 'f')) { - return TRUE; - } - return FALSE; -} - -// Convert x,y coords to linear coordinate -size_t xy_to_coord(size_t x, size_t y, uint32_t width, uint32_t height) -{ - return x + y*width; -} - -// Dilate masks by one 4-connected pixel -uint16_t* dilate(uint16_t* mask, uint32_t width, uint32_t height) -{ - uint16_t *new_mask = (uint16_t*)calloc(width*height,sizeof(uint16_t)); - for (size_t y = 0; y < height; y++) { - for (size_t x = 0; x < width; x++) { - size_t current_position = xy_to_coord(x, y, width, height); - if (mask[current_position] != 0) { - new_mask[current_position] = mask[current_position]; - continue; - } - size_t proposed_position; - if (x != 0) { - proposed_position = xy_to_coord(x-1, y, width, height); - if (mask[proposed_position] != 0) { - new_mask[current_position] = mask[proposed_position]; - continue; - } - } - if ((x+1) != width) { - proposed_position = xy_to_coord(x+1, y, width, height); - if (mask[proposed_position] != 0) { - new_mask[current_position] = mask[proposed_position]; - continue; - } - } - if (y != 0) { - proposed_position = xy_to_coord(x, y-1, width, height); - if (mask[proposed_position] != 0) { - new_mask[current_position] = mask[proposed_position]; - continue; - } - } - if ((y+1) != height) { - proposed_position = xy_to_coord(x, y+1, width, height); - if (mask[proposed_position] != 0) { - new_mask[current_position] = mask[proposed_position]; - continue; - } - } - } - } - return new_mask; -} - -// Combine Label Masks -// For all empty spaces in the destination, put the extra label if it exists -// Allocates an array if destination is unallocated -uint16_t* combine_masks(uint16_t *destination, uint16_t *extra_labels, uint32_t width, uint32_t height) -{ - if (destination == NULL) { - destination = (uint16_t*)calloc(width*height, sizeof(uint16_t)); - } - for (size_t y = 0; y < height; y++) { - for (size_t x = 0; x < width; x++) { - size_t coord = x + y*width; - if (destination[coord] == 0) { - destination[coord] = extra_labels[coord]; - } - } - } - return destination; -} - -// Process Tif File to Labels -// width, height will be overwritten with image dimensions -// starting_label_p will be incremented for each label found in the image -uint16_t* tif_to_labels(char* tif_file_name, uint32_t *width, uint32_t *height, uint16_t *starting_label_p) -{ - //-TIFF-IMAGE-OPEN------------------------------- - TIFF *tif = TIFFOpen(tif_file_name, "r"); - if (!tif) { - fprintf(stderr, "Failed to open TIFF file\n"); - return NULL; - } - - //-TIFF-FIND-DIMENSIONS-------------------------- - size_t channels = 1; - TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, width); - TIFFGetField(tif, TIFFTAG_IMAGELENGTH, height); - - tmsize_t STRIP_LENGTH = TIFFStripSize(tif); - tmsize_t STRIP_COUNT = TIFFNumberOfStrips(tif); - if ((*width)*(*height)*3 == STRIP_LENGTH*STRIP_COUNT) { - channels = 3; - } else if ((*width)*(*height)*4 == STRIP_LENGTH*STRIP_COUNT) { - channels = 4; - } - - //-TIFF-LOAD-DATA-------------------------------- - void* buffer = malloc(STRIP_LENGTH*sizeof(uint8_t)); - if (buffer == NULL) { - fprintf(stderr, "Memory allocation error\n"); - TIFFClose(tif); - return NULL; - } - uint8_t* image_data = calloc((*width)*(*height)*channels,sizeof(uint8_t)); - if (image_data == NULL) { - fprintf(stderr, "Memory allocation error\n"); - free(buffer); - TIFFClose(tif); - return NULL; - } - for (size_t y = 0; y < STRIP_COUNT; y++) { - tmsize_t strip_size = TIFFReadRawStrip(tif, y, buffer, STRIP_LENGTH); - assert(strip_size == STRIP_LENGTH); - for (size_t x = 0; x < STRIP_LENGTH; x++) { - image_data[x + y*STRIP_LENGTH] = ((uint8_t*)buffer)[x]; - } - } - free(buffer); - - //-FLOOD-FILL-SEGMENTATION----------------------- - //-CONTIGUOUS-REGION-FINDING--------------------- - uint16_t *labels = NULL; - labels = (uint16_t*)calloc((*width)*(*height),sizeof(uint16_t)); - if (labels == NULL) { - fprintf(stderr, "Memory allocation error\n"); - free(image_data); - TIFFClose(tif); - return NULL; - } - // Flood fill on each pixel - // Increase label for each success - for (size_t y = 0; y < *height; y++) { - for (size_t x = 0; x < *width; x++) { - size_t coord = x + y*(*width); - if(flood(image_data, labels, *width, *height, channels, x, y, &(image_data[coord*channels]), *starting_label_p)) { - *starting_label_p += 1; - } - } - } - free(image_data); - TIFFClose(tif); - return labels; -} - int main(int argc, char** argv) { //----------------------------------------------- @@ -204,23 +35,25 @@ int main(int argc, char** argv) if (is_tif_ext(fname) == FALSE) { free(file_list[index++]); continue; - } else { - printf("Tiff found!\n"); } char* fpath = full_path(argv[1], fname); + printf("Loading %s...\n", fpath); uint16_t *file_labels = tif_to_labels(fpath, &width, &height, &starting_label); masks = combine_masks(masks, file_labels, width, height); free(file_labels); - printf("%s\n", fpath); free(fpath); - printf("%s\n", fname); free(file_list[index++]); } free(file_list); } } } - printf("%u %u\n", width, height); + if (masks == NULL) { + fprintf(stderr, "No masks found!\n"); + return 1; + } + printf("%u labels found\n", starting_label-1); + printf("Mask dimensions: %u %u\n", width, height); for (uint16_t count = 0; count < 3; count++) { uint16_t *new_labels = dilate(masks, width, height); free(masks); -- cgit v1.2.1