Formatierung des Codes
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8481f50f70
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84
imageInput.c
84
imageInput.c
@ -9,19 +9,25 @@
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// TODO Implementieren Sie geeignete Hilfsfunktionen für das Lesen der Bildserie aus einer Datei
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// TODO Implementieren Sie geeignete Hilfsfunktionen für das Lesen der Bildserie aus einer Datei
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static int checkDimensions(unsigned int width, unsigned int height){
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int ok = 0;
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static FILE *openImageFile(const char *path)
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{
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if(width > 0 && height > 0)
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return fopen(path, "rb");
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return ok = 1;
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else
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return ok = 0;
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}
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}
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static int checkHeader(const GrayScalePixelType *buffer){
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static int ReadCheckHeader(FILE *fp, GrayScalePixelType *header)
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{
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if(fread(header, sizeof(GrayScalePixelType), HEADER_LEN, fp) != HEADER_LEN)
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{
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return 0;
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}
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return 1;
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}
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static int checkHeader(const GrayScalePixelType *buffer)
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{
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int ok = 0;
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int ok = 0;
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char header[HEADER_LEN + 1]; //Array mit Platz für Header Länge + \0 Character -> String
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char header[HEADER_LEN + 1]; //Array mit Platz für Header Länge + \0 Character -> String
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@ -43,22 +49,6 @@ static int checkHeader(const GrayScalePixelType *buffer){
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}
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}
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static FILE *openImageFile(const char *path)
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{
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return fopen(path, "rb");
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}
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static int ReadCheckHeader(FILE *fp, GrayScalePixelType *header)
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{
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if(fread(header, sizeof(GrayScalePixelType), HEADER_LEN, fp) != HEADER_LEN)
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{
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return 0;
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}
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return 1;
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}
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static int readMetaData(FILE *fp, unsigned short *numImages, unsigned short *width, unsigned short *height)
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static int readMetaData(FILE *fp, unsigned short *numImages, unsigned short *width, unsigned short *height)
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{
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{
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if(fread(numImages, sizeof(unsigned short), 1, fp) != 1 || fread(width, sizeof(unsigned short), 1, fp) != 1 || fread(height, sizeof(unsigned short), 1, fp)!= 1)
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if(fread(numImages, sizeof(unsigned short), 1, fp) != 1 || fread(width, sizeof(unsigned short), 1, fp) != 1 || fread(height, sizeof(unsigned short), 1, fp)!= 1)
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@ -69,12 +59,28 @@ static int readMetaData(FILE *fp, unsigned short *numImages, unsigned short *wid
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return 1;
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return 1;
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}
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}
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static int checkDimensions(unsigned int width, unsigned int height)
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{
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int ok = 0;
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if(width > 0 && height > 0)
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return ok = 1;
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else
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return ok = 0;
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}
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static GrayScaleImageSeries *allocateSeriesStruct(void)
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static GrayScaleImageSeries *allocateSeriesStruct(void)
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{
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{
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GrayScaleImageSeries *series = malloc(sizeof(GrayScaleImageSeries));
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GrayScaleImageSeries *series = malloc(sizeof(GrayScaleImageSeries));
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return series;
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return series;
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}
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}
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static int AllocateCheckImageAndLabels(GrayScaleImageSeries *series, unsigned int numImages)
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static int AllocateCheckImageAndLabels(GrayScaleImageSeries *series, unsigned int numImages)
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{
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{
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series->count = numImages;
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series->count = numImages;
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@ -95,6 +101,7 @@ static int AllocateCheckImageAndLabels(GrayScaleImageSeries *series, unsigned in
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return 1;
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return 1;
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}
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}
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static int AllocateCheckPixelData(GrayScaleImageSeries *series, unsigned int numImages, unsigned int width, unsigned int height)
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static int AllocateCheckPixelData(GrayScaleImageSeries *series, unsigned int numImages, unsigned int width, unsigned int height)
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{
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{
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for(unsigned int i = 0; i < numImages; i++){
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for(unsigned int i = 0; i < numImages; i++){
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@ -119,6 +126,7 @@ static int AllocateCheckPixelData(GrayScaleImageSeries *series, unsigned int num
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return 1;
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return 1;
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}
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}
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static int ReadImagesAndLabels(FILE *fp, GrayScaleImageSeries *series, unsigned int numImages, unsigned int width, unsigned int height)
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static int ReadImagesAndLabels(FILE *fp, GrayScaleImageSeries *series, unsigned int numImages, unsigned int width, unsigned int height)
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{
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{
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for(int i = 0; i < numImages; i++)
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for(int i = 0; i < numImages; i++)
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@ -146,13 +154,6 @@ static int ReadImagesAndLabels(FILE *fp, GrayScaleImageSeries *series, unsigned
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}
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}
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// TODO Vervollständigen Sie die Funktion readImages unter Benutzung Ihrer Hilfsfunktionen
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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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GrayScaleImageSeries *readImages(const char *path)
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{
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{
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@ -168,44 +169,57 @@ GrayScaleImageSeries *readImages(const char *path)
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//Prüfen, ob genau die HEADER_LEN Bytes eingelesen werden
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//Prüfen, ob genau die HEADER_LEN Bytes eingelesen werden
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if(!ReadCheckHeader(fp, header)){
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if(!ReadCheckHeader(fp, header)){
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fclose(fp);
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fclose(fp);
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return NULL;
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return NULL;
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}
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}
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//Prüfen, ob es sich um den korrekten Header handelt mit Hilfsfunktion
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//Prüfen, ob es sich um den korrekten Header handelt mit Hilfsfunktion
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if(!checkHeader(header)){
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if(!checkHeader(header)){
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fclose(fp);
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fclose(fp);
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return NULL;
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return NULL;
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}
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}
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//Anzahl der Bilder, Breite und Höhe einlesen
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//Anzahl der Bilder, Breite und Höhe einlesen
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unsigned short numImages, width, height; //muss man das als Zeiger initialisieren?????????
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unsigned short numImages, width, height;
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if(!readMetaData(fp, &numImages, &width, &height)){
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if(!readMetaData(fp, &numImages, &width, &height)){
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fclose(fp);
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fclose(fp);
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return NULL;
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return NULL;
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}
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}
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//Prüfen, ob gültige Länge oder Breite
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//Prüfen, ob gültige Länge oder Breite
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if(!checkDimensions(width, height)){
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if(!checkDimensions(width, height)){
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fclose(fp);
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fclose(fp);
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return NULL;
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return NULL;
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}
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}
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//Speicher für die gesamte Bildserie reservieren (aber nur für die Struktur)
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//Speicher für die gesamte Bildserie reservieren (aber nur für die Struktur)
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series = allocateSeriesStruct();
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series = allocateSeriesStruct();
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if(!series) {
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if(!series) {
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fclose(fp);
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fclose(fp);
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return NULL; //Fehler bei Speicherreservierung
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return NULL; //Fehler bei Speicherreservierung
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}
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}
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//Speicher für die Bild-Struktur und Label-Array reservieren und prüfen
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if(!AllocateCheckImageAndLabels(series, numImages)){
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if(!AllocateCheckImageAndLabels(series, numImages)){
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fclose(fp);
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fclose(fp);
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return NULL;
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return NULL;
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}
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}
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//Speicher für die Pixeldaten selbst reserviern und Prüfen, ob er reserviert werden konnte
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//Speicher für die Pixeldaten selbst reserviern und prüfen, ob er reserviert werden konnte
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if(!AllocateCheckPixelData(series, numImages, width, height)){
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if(!AllocateCheckPixelData(series, numImages, width, height)){
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fclose(fp);
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fclose(fp);
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@ -213,10 +227,12 @@ GrayScaleImageSeries *readImages(const char *path)
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}
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}
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//Einlesen der Pixeldaten und des zugehörigen Labels und prüfen auf Fehler
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if(!ReadImagesAndLabels(fp, series, numImages, width, height)){
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if(!ReadImagesAndLabels(fp, series, numImages, width, height)){
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fclose(fp);
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fclose(fp);
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return NULL;
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return NULL;
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}
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}
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fclose(fp);
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fclose(fp);
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