From 989ab8c38a02fa7ea9c25108151736c62e81c972 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Fri, 24 Apr 2015 17:27:50 +0000
Subject: [PATCH] IOU loss function
---
src/data.c | 80 +++++++++++++++++++++++++++++-----------
1 files changed, 58 insertions(+), 22 deletions(-)
diff --git a/src/data.c b/src/data.c
index 1ef2c40..f1f5b80 100644
--- a/src/data.c
+++ b/src/data.c
@@ -6,6 +6,8 @@
#include <stdlib.h>
#include <string.h>
+unsigned int data_seed;
+
struct load_args{
char **paths;
int n;
@@ -40,7 +42,7 @@
char **random_paths = calloc(n, sizeof(char*));
int i;
for(i = 0; i < n; ++i){
- int index = rand()%m;
+ int index = rand_r(&data_seed)%m;
random_paths[i] = paths[index];
if(i == 0) printf("%s\n", paths[index]);
}
@@ -57,30 +59,28 @@
for(i = 0; i < n; ++i){
image im = load_image_color(paths[i], w, h);
- translate_image(im, -128);
- scale_image(im, 1./128);
X.vals[i] = im.data;
X.cols = im.h*im.w*im.c;
}
return X;
}
-typedef struct box{
+typedef struct{
int id;
float x,y,w,h;
float left, right, top, bottom;
-} box;
+} box_label;
-box *read_boxes(char *filename, int *n)
+box_label *read_boxes(char *filename, int *n)
{
- box *boxes = calloc(1, sizeof(box));
+ box_label *boxes = calloc(1, sizeof(box_label));
FILE *file = fopen(filename, "r");
if(!file) file_error(filename);
float x, y, h, w;
int id;
int count = 0;
while(fscanf(file, "%d %f %f %f %f", &id, &x, &y, &w, &h) == 5){
- boxes = realloc(boxes, (count+1)*sizeof(box));
+ boxes = realloc(boxes, (count+1)*sizeof(box_label));
boxes[count].id = id;
boxes[count].x = x;
boxes[count].y = y;
@@ -97,12 +97,12 @@
return boxes;
}
-void randomize_boxes(box *b, int n)
+void randomize_boxes(box_label *b, int n)
{
int i;
for(i = 0; i < n; ++i){
- box swap = b[i];
- int index = rand()%n;
+ box_label swap = b[i];
+ int index = rand_r(&data_seed)%n;
b[i] = b[index];
b[index] = swap;
}
@@ -114,7 +114,7 @@
labelpath = find_replace(labelpath, ".jpg", ".txt");
labelpath = find_replace(labelpath, ".JPEG", ".txt");
int count = 0;
- box *boxes = read_boxes(labelpath, &count);
+ box_label *boxes = read_boxes(labelpath, &count);
randomize_boxes(boxes, count);
float x,y,w,h;
float left, top, right, bot;
@@ -174,10 +174,10 @@
if(background) truth[index++] = 0;
truth[index+id] = 1;
index += classes;
- truth[index++] = y;
truth[index++] = x;
- truth[index++] = h;
+ truth[index++] = y;
truth[index++] = w;
+ truth[index++] = h;
}
free(boxes);
}
@@ -294,6 +294,12 @@
d.y = make_matrix(n, k);
for(i = 0; i < n; ++i){
image orig = load_image_color(random_paths[i], 0, 0);
+ float exposure = rand_uniform()+1;
+ if(rand_uniform() > .5) exposure = 1/exposure;
+
+ float saturation = rand_uniform()+1;
+ if(rand_uniform() > .5) saturation = 1/saturation;
+
int oh = orig.h;
int ow = orig.w;
@@ -310,8 +316,15 @@
float sx = (float)swidth / ow;
float sy = (float)sheight / oh;
+
+ /*
+ float angle = rand_uniform()*.1 - .05;
+ image rot = rotate_image(orig, angle);
+ free_image(orig);
+ orig = rot;
+ */
- int flip = rand()%2;
+ int flip = rand_r(&data_seed)%2;
image cropped = crop_image(orig, pleft, ptop, swidth, sheight);
float dx = ((float)pleft/ow)/sx;
float dy = ((float)ptop /oh)/sy;
@@ -330,11 +343,9 @@
void *load_detection_thread(void *ptr)
{
- printf("Loading data: %d\n", rand());
+ printf("Loading data: %d\n", rand_r(&data_seed));
struct load_args a = *(struct load_args*)ptr;
*a.d = load_data_detection_jitter_random(a.n, a.paths, a.m, a.classes, a.w, a.h, a.num_boxes, a.background);
- translate_data_rows(*a.d, -128);
- scale_data_rows(*a.d, 1./128);
free(ptr);
return 0;
}
@@ -397,6 +408,31 @@
return thread;
}
+matrix concat_matrix(matrix m1, matrix m2)
+{
+ int i, count = 0;
+ matrix m;
+ m.cols = m1.cols;
+ m.rows = m1.rows+m2.rows;
+ m.vals = calloc(m1.rows + m2.rows, sizeof(float*));
+ for(i = 0; i < m1.rows; ++i){
+ m.vals[count++] = m1.vals[i];
+ }
+ for(i = 0; i < m2.rows; ++i){
+ m.vals[count++] = m2.vals[i];
+ }
+ return m;
+}
+
+data concat_data(data d1, data d2)
+{
+ data d;
+ d.shallow = 1;
+ d.X = concat_matrix(d1.X, d2.X);
+ d.y = concat_matrix(d1.y, d2.y);
+ return d;
+}
+
data load_categorical_data_csv(char *filename, int target, int k)
{
data d;
@@ -435,7 +471,7 @@
X.vals[i][j] = (double)bytes[j+1];
}
}
- translate_data_rows(d, -144);
+ translate_data_rows(d, -128);
scale_data_rows(d, 1./128);
//normalize_data_rows(d);
fclose(fp);
@@ -446,7 +482,7 @@
{
int j;
for(j = 0; j < n; ++j){
- int index = rand()%d.X.rows;
+ int index = rand_r(&data_seed)%d.X.rows;
memcpy(X+j*d.X.cols, d.X.vals[index], d.X.cols*sizeof(float));
memcpy(y+j*d.y.cols, d.y.vals[index], d.y.cols*sizeof(float));
}
@@ -491,7 +527,7 @@
fclose(fp);
}
//normalize_data_rows(d);
- translate_data_rows(d, -144);
+ translate_data_rows(d, -128);
scale_data_rows(d, 1./128);
return d;
}
@@ -500,7 +536,7 @@
{
int i;
for(i = d.X.rows-1; i > 0; --i){
- int index = rand()%i;
+ int index = rand_r(&data_seed)%i;
float *swap = d.X.vals[index];
d.X.vals[index] = d.X.vals[i];
d.X.vals[i] = swap;
--
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