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bf36733274 | ||
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5dfce43fa1 | ||
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42aa64d260 | ||
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30b5586a1f | ||
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432e6f9513 |
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+23
-5
@@ -16,18 +16,19 @@ static FILE* openFileCheckHeader(const char *path)
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return NULL;
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char headerbuffer[BUFFER_SIZE];
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size_t headerlength = strlen(FILE_HEADER_STRING);
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if((fread(headerbuffer, sizeof(char), headerlength, fp)) < headerbuffer)
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if((fread(headerbuffer, sizeof(char), headerlength, fp)) != headerlength)
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{
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fclose(fp);
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return NULL;
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}
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if(strncmp(FILE_HEADER_STRING, headerbuffer, headerlength) != 0)
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{
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flcose(fp);
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fclose(fp);
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return NULL;
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}
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return fp;
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}//Oeffnet die Datei. 2. liest aus Datei headerlaenge laenge aus speichert in array vergleicht mit gewolltem header.
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}
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//Oeffnet die Datei. 2. liest aus Datei headerlaenge laenge aus speichert in array vergleicht mit gewolltem header.
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///Gibt bei Erfolg (header laenge richtig, richtiger header) den FILE* Zeiger zurück welcher nun gespeichert hat
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///dass nun der header Teil gelesen wurde und somit die nächste Funktion ab dieser Stelle weiter liest.
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///NULL, wenn falscher header.
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@@ -61,7 +62,7 @@ static GrayScaleImageSeries* allocateSeries(unsigned int count)
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// 2. Prüfen, ob Speicherreservierung nicht funktioniert hat
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if (series == NULL) {
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return NULL;
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return NULL;//Wir müssen nichts freen, da wir keinen Speicherplatz reservieren konnten! Gibt nix zu freen
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}
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// 3. Initialiseren der Struktur.
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@@ -164,7 +165,7 @@ GrayScaleImageSeries *readImages(const char *path)
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unsigned int count = 0, width = 0, height = 0;
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// --- Schritt 1: Datei öffnen und Header prüfen ---
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fp = openAndValidateHeader(path);
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fp = openFileCheckHeader(path);
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if (fp == NULL) {
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fprintf(stderr, "Fehler: Datei konnte nicht geöffnet oder validiert werden.\n");
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return NULL; // Kein Aufräumen nötig, da nichts reserviert/geöffnet wurde
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@@ -202,4 +203,21 @@ GrayScaleImageSeries *readImages(const char *path)
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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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//von innen nach außen freen
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if(series == NULL)
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{
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return;//beendet Funktion. Fall series == NULL würde das ausführen der folgenden zu einem segmentation fault führen.
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}
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if(series->images != NULL)
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{
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for(unsigned int i = 0; i < series->count; i++)
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{
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if(series->images[i].buffer != NULL)
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free(series->images[i].buffer);
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}
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free(series->images);
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}
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if(series->labels != NULL)
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free(series->labels);
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free(series);
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}
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Binary file not shown.
@@ -4,32 +4,157 @@
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// TODO Matrix-Funktionen implementieren
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//Matrix dimensionieren
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Matrix createMatrix(unsigned int rows, unsigned int cols)
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{
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Matrix m; //Struktur anlegen, Varibale m von Typ Matrix
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//Sonderfall aus Unit-Test, wenn rows == 0 oder cols == 0, darf kein Speicher allokiert werden
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if(rows==0 || cols==0){
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m.rows = 0;
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m.cols = 0;
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m.buffer = NULL;
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return m;
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}
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//Normalfall
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m.rows = rows; // strukurvariable.feldname --> Struktur-Zugriffsoperator
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m.cols = cols;
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m.buffer = malloc((rows * cols) * sizeof(MatrixType)); //Speicher reserviert für Elemente
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return m;
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}
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void clearMatrix(Matrix *matrix)
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{
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// falls Speicher existiert (buffer NICHT NULL ist): freigeben
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if(matrix->buffer != NULL)
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{
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free(matrix->buffer);// Speicher freigegeben aber zeigt irgendwo hin (dangling pointer)
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}
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//Matrix in definierten leeren Zustand setzen
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matrix->buffer = NULL; // dangling pointer zurücksetzen
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matrix->rows = 0;
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matrix->cols = 0;
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}
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//Wert in Matrix schreiben und wo genau
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void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
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{
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// Sicherheit: wenn buffer == NULL (kein gültiger Speicher) oder Index außerhalb der Matrix --> return
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if(matrix.buffer == NULL || rowIdx >= matrix.rows || colIdx >= matrix.cols)
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{
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return;
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}
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//index = Zeile * Anzahl_Spalten + Spalte
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unsigned int index = rowIdx * matrix.cols + colIdx;
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// Schreibt value direkt an die berechnete Position im Matrixspeicher
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matrix.buffer[index] = value;
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}
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MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
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{
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if (matrix.buffer == NULL || rowIdx >= matrix.rows || colIdx >= matrix.cols)
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{
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return 0;
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}
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unsigned int index = rowIdx * matrix.cols + colIdx;
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return matrix.buffer[index];
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}
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Matrix add(const Matrix matrix1, const Matrix matrix2)
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{
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Matrix result;
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//Zeilen müssen gleich sein
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if (matrix1.rows != matrix2.rows)
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{
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result.rows = 0;
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result.cols = 0;
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result.buffer = NULL;
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return result;
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}
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//Spalten müssen gleich sein (mit broadcasting)
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//Fälle: gleiche Spalten ok, matrix1 hat 1 Spalte, matrix2 hat 1 Spalte
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//sonst inkompatibel
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if (matrix1.cols != matrix2.cols && matrix1.cols != 1 && matrix2.cols != 1)
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{
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result.rows = 0;
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result.cols = 0;
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result.buffer = NULL;
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return result;
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}
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result.rows = matrix1.rows;
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result.cols = (matrix1.cols > matrix2.cols) ? matrix1.cols : matrix2.cols;
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result.buffer = malloc(result.rows * result.cols * sizeof(MatrixType));
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for (unsigned int r = 0; r < result.rows; r++)
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{
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for (unsigned int c = 0; c < result.cols; c++)
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{
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// Bestimme Spalte für matrix1:
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// Wenn nur 1 Spalte -> immer Spalte 0 benutzen
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unsigned int c1 = (matrix1.cols == 1) ? 0 : c;
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// Bestimme Spalte für matrix2:
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unsigned int c2 = (matrix2.cols == 1) ? 0 : c;
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MatrixType v1 = getMatrixAt(matrix1, r, c1);
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MatrixType v2 = getMatrixAt(matrix2, r, c2);
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setMatrixAt(v1 + v2, result, r, c);
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}
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}
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return result;
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}
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Matrix multiply(const Matrix matrix1, const Matrix matrix2)
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{
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}
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Matrix result;
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if(matrix1.cols != matrix2.rows)
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{
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result.rows = 0;
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result.cols = 0;
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result.buffer = NULL;
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return result;
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}
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result.rows = matrix1.rows;
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result.cols = matrix2.cols;
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result.buffer = malloc(result.rows * result.cols * sizeof(MatrixType));
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for (unsigned int r = 0; r < result.rows; r++)
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{
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for (unsigned int c = 0; c < result.cols; c++)
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{
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MatrixType sum = 0;
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// gemeinsame Dimension = matrix1.cols = matrix2.rows
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for (unsigned int i = 0; i < matrix1.cols; i++)
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{
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MatrixType a = getMatrixAt(matrix1, r, i);
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MatrixType b = getMatrixAt(matrix2, i, c);
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sum += a * b;
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}
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setMatrixAt(sum, result, r, c);
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}
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}
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return result;
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}
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@@ -6,6 +6,11 @@
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typedef float MatrixType;
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// TODO Matrixtyp definieren
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typedef struct {
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unsigned int rows;
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unsigned int cols;
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MatrixType* buffer; //buffer Pointer zeigt auf Heap, mit malloc dort dann Speicher reservieren
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} Matrix;
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Matrix createMatrix(unsigned int rows, unsigned int cols);
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@@ -16,4 +21,4 @@ Matrix add(const Matrix matrix1, const Matrix matrix2);
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Matrix multiply(const Matrix matrix1, const Matrix matrix2);
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#endif
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#endif
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+1
-1
@@ -170,7 +170,7 @@ NeuralNetwork loadModel(const char *path)
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static Matrix imageBatchToMatrixOfImageVectors(const GrayScaleImage images[], unsigned int count)
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{
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Matrix matrix = {NULL, 0, 0};
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Matrix matrix = (Matrix){0, 0, NULL};
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if(count > 0 && images != NULL)
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{
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+1
-1
@@ -23,4 +23,4 @@ NeuralNetwork loadModel(const char *path);
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unsigned char *predict(const NeuralNetwork model, const GrayScaleImage images[], unsigned int numberOfImages);
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void clearModel(NeuralNetwork *model);
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#endif
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#endif
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+36
-1
@@ -6,11 +6,46 @@
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#include "neuralNetwork.h"
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static void prepareNeuralNetworkFile(const char *path, const NeuralNetwork nn)
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{
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// TODO
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//öffnet die Datei in Binär zum schreiben
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FILE *file = fopen(path, "wb");
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if (!file) return;
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//Fester Headerstring
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const char *tag = "__info2_neural_network_file_format__";
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fwrite(tag, sizeof(char), strlen(tag), file);
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//Bestimmt die Eingabedimension
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int inputDim = nn.layers[0].weights.cols;
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fwrite(&inputDim, sizeof(int), 1, file);
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for (unsigned int i = 0; i < nn.numberOfLayers; i++) {
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const Layer *L = &nn.layers[i];
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const Matrix *W = &L->weights;
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const Matrix *B = &L->biases;
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int outputDim = W->rows;
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fwrite(&outputDim, sizeof(int), 1, file);
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//Anzahl der Weight-Werte
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size_t weightCount = (size_t)(W->rows * W->cols);
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fwrite(&weightCount, sizeof(size_t), 1, file);
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//Anzahl der Bias-Werte
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size_t biasCount = (size_t)(B->rows * B->cols);
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fwrite(B->buffer, sizeof(MatrixType), biasCount, file);
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inputDim = outputDim;
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}
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int zero = 0;
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fwrite(&zero, sizeof(int), 1, file);
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fclose(file);
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}
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void test_loadModelReturnsCorrectNumberOfLayers(void)
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{
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const char *path = "some__nn_test_file.info2";
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Executable
BIN
Binary file not shown.
Reference in new issue
Block a user