74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "imageInput.h"
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#define BUFFER_SIZE 100
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#define FILE_HEADER_STRING "__info2_image_file_format__"
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// TODO Implementieren Sie geeignete Hilfsfunktionen für das Lesen der Bildserie aus einer Datei
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// TODO Vervollständigen Sie die Funktion readImages unter Benutzung Ihrer Hilfsfunktionen
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GrayScaleImageSeries *readImages(const char *path)
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{
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FILE *file = fopen(path, "rb");
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if (!file) return NULL;
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fseek(file, strlen("__info2_image_file_format__"), SEEK_SET);
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unsigned short anzahlBilder, width, height;
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fread(&anzahlBilder, sizeof(unsigned short), 1, file);
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fread(&width, sizeof(unsigned short), 1, file);
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fread(&height, sizeof(unsigned short), 1, file);
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GrayScaleImageSeries *series = malloc(sizeof(GrayScaleImageSeries));
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if (!series) {
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fclose(file);
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return 0;
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}
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series->count = anzahlBilder;
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series->images = malloc(sizeof(GrayScaleImage) * anzahlBilder);
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series->labels = malloc(sizeof(unsigned char) * anzahlBilder);
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int pixelCount = width * height;
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for (unsigned int i = 0; i < anzahlBilder; i++)
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{
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series->images[i].width = width;
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series->images[i].height = height;
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series->images[i].buffer = malloc(pixelCount);
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fread(series->images[i].buffer, 1, pixelCount, file);
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fread(&series->labels[i], 1, 1, file);
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}
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fclose(file);
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return series;
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}
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// TODO Vervollständigen Sie die Funktion clearSeries, welche eine Bildserie vollständig aus dem Speicher freigibt
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void clearSeries(GrayScaleImageSeries *series)
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{
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if (series == NULL)
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return 0;
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for (unsigned int i = 0; i < series->count; i++)
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{
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free(series->images[i].buffer);
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series->images[i].buffer = NULL;
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}
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free(series->images);
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free(series->labels);
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series->images = NULL;
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series->labels = NULL;
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free(series);
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}
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