Optisch leicht verbessert

imageInput.c

@@ -6,149 +6,17 @@
 #define BUFFER_SIZE 100
 #define FILE_HEADER_STRING "__info2_image_file_format__"
 
+// TODO Implementieren Sie geeignete Hilfsfunktionen für das Lesen der Bildserie aus einer Datei
 
-// DONE Implementieren Sie geeignete Hilfsfunktionen für das Lesen der Bildserie aus einer Datei
+// TODO Vervollständigen Sie die Funktion readImages unter Benutzung Ihrer Hilfsfunktionen
-unsigned int    readStatusInfo      (FILE *const source, GrayScaleImageSeries *const series, char *const headerString, int const sizeToRead, int const amountToRead);
-void            readImagedata       (FILE *const source, GrayScaleImageSeries *const series, int const amountToRead);
-unsigned int    checkHeaderString   (const char *const header);
-
-
-// DONE Vervollständigen Sie die Funktion readImages unter Benutzung Ihrer Hilfsfunktionen
 GrayScaleImageSeries *readImages(const char *path)
 {
     GrayScaleImageSeries *series = NULL;
-    FILE                    *readSource                                 = 0;
-    const unsigned int      sizeOfStausInfoElementsInBytes              = 2;
-    const unsigned int      amountOfStatusInfoToRead                    = 1;
-    unsigned int            numberOfBytesToRead                         = 0;
-    unsigned int            expectedHeader                              = 0;
-    char                    headerString[sizeof(FILE_HEADER_STRING)]    = "";
-    
-    
-    readSource = fopen(path, "rb");
-    
-    if (readSource != NULL)
-    {
-        series                  = calloc(sizeof(unsigned int) + 3* sizeof(headerString),  amountOfStatusInfoToRead);
-        series->images          = calloc(2*sizeof(unsigned int) + sizeof(headerString),  amountOfStatusInfoToRead);
-        
-        numberOfBytesToRead     = readStatusInfo(readSource, series, headerString, sizeOfStausInfoElementsInBytes, amountOfStatusInfoToRead);
-        
-        expectedHeader          = checkHeaderString(headerString);
-
-        series->images->buffer  = calloc((series->count) * numberOfBytesToRead, sizeof(GrayScalePixelType));
-        series->labels          = calloc((series->count),                       sizeof(&(series->labels)));
-
-        if (expectedHeader)
-        {
-            // reallocate memory so that each image width can be saved seperately
-            series->images      = realloc(series->images, series->count * 2 * sizeof(unsigned int) + sizeof(headerString));
-            
-            for (int i = 0; i < series->count; i++)
-            {
-                series->images[i].width     = series->images->width;
-                series->images[i].height    = series->images->height;
-            }
-            
-            readImagedata(readSource, series, numberOfBytesToRead);
-        }
-        else
-        {
-            series = NULL;
-        }
-        
-        fclose(readSource);
-    }
     
     return series;
 }
 
-
+// TODO Vervollständigen Sie die Funktion clearSeries, welche eine Bildserie vollständig aus dem Speicher freigibt
-// DONE Vervollständigen Sie die Funktion clearSeries, welche eine Bildserie vollständig aus dem Speicher freigibt
+void clearSeries(GrayScaleImageSeries *series)
-void clearSeries(GrayScaleImageSeries * series)
 {
-    int i = 0;
-
-    
-    // Write NULL into all memory spaces
-    for (i = 0; i < ((series->count) * (series->images->width) * (series->images->height) / 4); i++)
-    {   
-        *(series->images->buffer + i * 4 * (series->images->width) * (series->images->height)) = '\0';
-    }
-    
-    for (i = 0; i < (series->count); i++)
-    {
-        *(series->labels + i) = '\0';
-    }
-    
-    series->count           = 0;
-    series->images->width   = 0;
-    series->images->height  = 0;
-
-    // Closse all allocated memory
-    // AND write NULL into every pointer
-    // so they can't be accessed
-    free(series->images->buffer);
-    series->images->buffer  = NULL;
-    free(series->labels);
-    series->labels          = NULL;
-    free(series->images);
-    series->images          = NULL;
-    free(series);
-    series                  = NULL;
-
 }
-
-
-//  reads headerString, pictureCount, pictureWidth, pictureHight
-unsigned int readStatusInfo(FILE *const source, GrayScaleImageSeries *const series, char *const headerString, int const sizeToRead, int const amountToRead)
-{
-    unsigned int bytesToRead = 0;
-
-
-    fread(headerString,                 sizeof(FILE_HEADER_STRING) - 1,     amountToRead, source);
-    fread(&(series->count),             sizeToRead,                         amountToRead, source);
-    fread(&(series->images->width),     sizeToRead,                         amountToRead, source);
-    fread(&(series->images->height),    sizeToRead,                         amountToRead, source);
-
-    bytesToRead = (series->images->width) * (series->images->height);
-
-
-    return bytesToRead;
-}
-
-
-//  reads the imagebytes and the label of all images
-void readImagedata(FILE *const source, GrayScaleImageSeries *const series,  int const amountOfBytes)
-{
-    int i = 0;
-
-
-    for (i = 0; i < series->count ; i++)
-    {
-        fread(&(series->images->buffer[i]), sizeof(*series->images->buffer), amountOfBytes,             source);
-        fread(&(series->labels[i]),         sizeof(*series->images->buffer), sizeof(*series->labels),   source);
-    }
-}
-
-
-// checks if the read headerString matches the expected headerString
-unsigned int checkHeaderString(const char *const header)
-{
-    int i                                           = 0;
-    int notIdenticall                               = 0;
-    char expectedHeader[sizeof(FILE_HEADER_STRING)] = FILE_HEADER_STRING;
-
-
-    for (i = 0; i < sizeof(FILE_HEADER_STRING); i++)
-    {
-        if (header[i] != expectedHeader[i])
-        {
-            notIdenticall = 1;
-        }
-    }
-    
-
-    return !notIdenticall;
-}
-

imageInputTests.c

@@ -14,6 +14,7 @@ static void prepareImageFile(const char *path, unsigned short int width, unsigne
     {
         const char *fileTag = "__info2_image_file_format__";
         GrayScalePixelType *zeroBuffer = (GrayScalePixelType *)calloc(numberOfImages * width * height, sizeof(GrayScalePixelType));
+
         if(zeroBuffer != NULL)
         {
             fwrite(fileTag, sizeof(fileTag[0]), strlen(fileTag), file);

matrix.c

@@ -1,35 +1,238 @@
 #include <stdlib.h>
 #include <string.h>
+#include <stdio.h>
 #include "matrix.h"
 
 // TODO Matrix-Funktionen implementieren
 
 Matrix createMatrix(unsigned int rows, unsigned int cols)
 {
+    Matrix matrix;
+    Matrix empty = {0, 0, NULL};
 
+    if(rows == 0 || cols == 0)
+    {
+        //print("Fehler: Dimensionen muessen >= 1 sein!");
+        return empty;
+    }
+
+    matrix.rows = rows;
+    matrix.cols = cols;
+    matrix.buffer = malloc(rows * cols * sizeof(float));
+
+    if(matrix.buffer == NULL)
+    {
+        //printf("Fehler bei der Speicherreservierung! Keine Matrix erstellt!");
+        matrix.rows = 0;
+        matrix.cols = 0;
+    }
+
+    return matrix;
 }
 
 void clearMatrix(Matrix *matrix)
 {
+    free(matrix->buffer);
 
+    matrix->buffer = NULL;
+    matrix->rows = 0;
+    matrix->cols = 0;
 }
 
 void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
+    if(matrix.buffer == NULL)
+    {
+        //printf("Fehler beim Setzen! Matrix nicht initialisiert");
+        return;
+    }
 
+    if(rowIdx >= matrix.rows || colIdx >= matrix.cols)
+    {
+        //printf("Ungueltige Indizes beim Setzen!\n");
+        return;
+    }
+
+    matrix.buffer[rowIdx * matrix.cols + colIdx] = value;
 }
 
 MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
+    if(matrix.buffer == NULL)
+    {
+        //printf("Fehler beim Lesen! Matrix nicht initialisiert");
+        return 0;
+    }
 
+    if(rowIdx >= matrix.rows || colIdx >= matrix.cols)
+    {
+        //printf("Ungueltige Indizes beim Lesen!\n");
+        return 0;
+    }
+
+    return matrix.buffer[rowIdx * matrix.cols + colIdx];
 }
 
 Matrix add(const Matrix matrix1, const Matrix matrix2)
 {
+    float matrix1Wert = 0;
+    float matrix2Wert = 0;
+    float summe = 0;
+    int broadcasting = 0;
 
+    Matrix broadcastedmatrix1 = {0,0,NULL};
+    Matrix broadcastedmatrix2 = {0,0,NULL};
+
+    if((matrix1.rows != matrix2.rows) || (matrix1.cols != matrix2.cols))
+    {
+        if((matrix1.rows != matrix2.rows) && (matrix1.cols == matrix2.cols))
+        {
+            if(matrix1.rows == 1)
+            {
+                broadcastedmatrix1 = createMatrix(matrix2.rows, matrix2.cols);
+
+                for(int row = 0; row<matrix2.rows; row++)
+                {
+                    for(int col = 0; col<matrix2.cols; col++)
+                    {
+                        matrix1Wert = getMatrixAt(matrix1, 0, col);
+                        setMatrixAt(matrix1Wert, broadcastedmatrix1, row, col);
+                    }
+                }
+
+                broadcasting = 1;
+            }
+            else if(matrix2.rows == 1)
+            {
+                broadcastedmatrix2 = createMatrix(matrix1.rows, matrix1.cols);
+                
+                for(int row = 0; row<matrix1.rows; row++)
+                {
+                    for(int col = 0; col<matrix1.cols; col++)
+                    {
+                        matrix2Wert = getMatrixAt(matrix2, 0, col);
+                        setMatrixAt(matrix2Wert, broadcastedmatrix2, row, col);
+                    }
+                }
+
+                broadcasting = 2;
+            }
+        }
+        else if((matrix1.rows == matrix2.rows) && (matrix1.cols != matrix2.cols))
+        {
+            if(matrix1.cols == 1)
+            {
+                broadcastedmatrix1 = createMatrix(matrix2.rows, matrix2.cols);
+
+                for(int row = 0; row<matrix2.rows; row++)
+                {
+                    for(int col = 0; col<matrix2.cols; col++)
+                    {
+                        matrix1Wert = getMatrixAt(matrix1, row, 0);
+                        setMatrixAt(matrix1Wert, broadcastedmatrix1, row, col);
+                    }
+                }
+
+                broadcasting = 1;
+            }
+            else if(matrix2.cols == 1)
+            {
+                broadcastedmatrix2 = createMatrix(matrix1.rows, matrix1.cols);
+
+                for(int row = 0; row<matrix1.rows; row++)
+                {
+                    for(int col = 0; col<matrix1.cols; col++)
+                    {
+                        matrix2Wert = getMatrixAt(matrix2, row, 0);
+                        setMatrixAt(matrix2Wert, broadcastedmatrix2, row, col);
+                    }
+                }
+
+                broadcasting = 2;
+            }
+        }
+        else
+        {
+        //printf("Fehler bei Addition: Matrix Dimensionen stimmen nicht ueberein!\n");
+        Matrix empty = {0, 0, NULL};
+        return empty;
+        }
+    }
+
+    Matrix ergebnisMatrix;
+
+    switch (broadcasting)
+    {
+        case 0:
+        case 2:
+            ergebnisMatrix = createMatrix(matrix1.rows, matrix1.cols);
+        break;
+
+        case 1:
+            ergebnisMatrix = createMatrix(matrix2.rows, matrix2.cols);
+        break;
+    }
+
+    for(int row = 0; row < ergebnisMatrix.rows; row++)
+    {
+        for(int col = 0; col < ergebnisMatrix.cols; col++)
+        {
+            if(broadcasting == 0)
+            {
+                matrix1Wert = getMatrixAt(matrix1, row, col);
+                matrix2Wert = getMatrixAt(matrix2, row, col);
+                summe = matrix1Wert + matrix2Wert;
+            }
+            else if(broadcasting == 1)
+            {
+                matrix1Wert = getMatrixAt(broadcastedmatrix1, row, col);
+                matrix2Wert = getMatrixAt(matrix2, row, col);
+                summe = matrix1Wert + matrix2Wert;
+            }
+            else if(broadcasting == 2)
+            {
+                matrix1Wert = getMatrixAt(matrix1, row, col);
+                matrix2Wert = getMatrixAt(broadcastedmatrix2, row, col);
+                summe = matrix1Wert + matrix2Wert;
+            }
+
+            setMatrixAt(summe, ergebnisMatrix, row, col);
+        }
+    }
+
+    clearMatrix(&broadcastedmatrix1);
+    clearMatrix(&broadcastedmatrix2);
+
+    return ergebnisMatrix;
 }
 
 Matrix multiply(const Matrix matrix1, const Matrix matrix2)
 {
+    if(matrix1.cols != matrix2.rows)
+    {
+        //printf("Fehler bei Multiplikation: Matrix Dimensionen passen nicht ueberein!\n");
+        Matrix empty = {0, 0, NULL};
+        return empty;
+    }
 
+    float erg = 0;
+
+    Matrix ergebnisMatrix = createMatrix(matrix1.rows, matrix2.cols);
+
+    for(int row = 0; row < ergebnisMatrix.rows; row++)
+    {
+        for(int col = 0; col < ergebnisMatrix.cols; col++)
+        {
+            erg = 0;
+
+            for(int k = 0; k < matrix1.cols; k++)
+            {
+                erg += getMatrixAt(matrix1, row, k) * getMatrixAt(matrix2, k, col);
+            }
+
+            setMatrixAt(erg, ergebnisMatrix, row, col);
+        }
+    }
+
+    return ergebnisMatrix;
 }

matrix.h

@@ -6,7 +6,12 @@
 typedef float MatrixType;
 
 // TODO Matrixtyp definieren
-
+typedef struct
+{
+    int rows;
+    int cols;
+    float *buffer;
+} Matrix;
 
 Matrix createMatrix(unsigned int rows, unsigned int cols);
 void clearMatrix(Matrix *matrix);