From f98bf6bbdb5ed81f2ea2071ad8e705130f7ba596 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Sat, 28 Mar 2015 23:11:37 +0000
Subject: [PATCH] We do our OWN resizing!
---
src/data.c | 106 ++++++++++++++++++++++++++++++++++++++++++-----------
1 files changed, 84 insertions(+), 22 deletions(-)
diff --git a/src/data.c b/src/data.c
index 0c93597..7069248 100644
--- a/src/data.c
+++ b/src/data.c
@@ -18,6 +18,7 @@
int nw;
int jitter;
int classes;
+ int background;
data *d;
};
@@ -62,17 +63,67 @@
return X;
}
-void fill_truth_detection(char *path, float *truth, int classes, int height, int width, int num_height, int num_width, int dy, int dx, int jitter, int flip)
+typedef struct box{
+ int id;
+ float x,y,w,h;
+} box;
+
+box *read_boxes(char *filename, int *n)
+{
+ box *boxes = calloc(1, sizeof(box));
+ 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[count].id = id;
+ boxes[count].x = x;
+ boxes[count].y = y;
+ boxes[count].h = h;
+ boxes[count].w = w;
+ ++count;
+ }
+ fclose(file);
+ *n = count;
+ return boxes;
+}
+
+void randomize_boxes(box *b, int n)
+{
+ int i;
+ for(i = 0; i < n; ++i){
+ box swap = b[i];
+ int index = rand()%n;
+ b[i] = b[index];
+ b[index] = swap;
+ }
+}
+
+void fill_truth_detection(char *path, float *truth, int classes, int height, int width, int num_height, int num_width, int dy, int dx, int jitter, int flip, int background)
{
int box_height = height/num_height;
int box_width = width/num_width;
char *labelpath = find_replace(path, "VOC2012/JPEGImages", "labels");
labelpath = find_replace(labelpath, ".jpg", ".txt");
- FILE *file = fopen(labelpath, "r");
- if(!file) file_error(labelpath);
+ int count = 0;
+ box *boxes = read_boxes(labelpath, &count);
+ randomize_boxes(boxes, count);
float x, y, h, w;
int id;
- while(fscanf(file, "%d %f %f %f %f", &id, &x, &y, &w, &h) == 5){
+ int i;
+ if(background){
+ for(i = 0; i < num_height*num_width*(4+classes+background); i += 4+classes+background){
+ truth[i] = 1;
+ }
+ }
+ for(i = 0; i < count; ++i){
+ x = boxes[i].x;
+ y = boxes[i].y;
+ w = boxes[i].w;
+ h = boxes[i].h;
+ id = boxes[i].id;
if(flip) x = 1-x;
x *= width + jitter;
y *= height + jitter;
@@ -86,24 +137,22 @@
if(j < 0) j = 0;
if(j >= num_height) j = num_height-1;
- float dw = (x - i*box_width)/box_width;
- float dh = (y - j*box_height)/box_height;
- //printf("%d %d %d %f %f\n", id, i, j, dh, dw);
- int index = (i+j*num_width)*(4+classes);
+ float dw = constrain(0,1, (x - i*box_width)/box_width );
+ float dh = constrain(0,1, (y - j*box_height)/box_height );
+ float th = constrain(0,1, h*(height+jitter)/height );
+ float tw = constrain(0,1, w*(width+jitter)/width );
+
+ int index = (i+j*num_width)*(4+classes+background);
+ if(truth[index+classes+background+2]) continue;
+ if(background) truth[index++] = 0;
truth[index+id] = 1;
index += classes;
truth[index++] = dh;
truth[index++] = dw;
- truth[index++] = h*(height+jitter)/height;
- truth[index++] = w*(width+jitter)/width;
+ truth[index++] = th;
+ truth[index++] = tw;
}
- int i, j;
- for(i = 0; i < num_height*num_width*(4+classes); i += 4+classes){
- int background = 1;
- for(j = i; j < i+classes; ++j) if (truth[j]) background = 0;
- truth[i+classes-1] = background;
- }
- fclose(file);
+ free(boxes);
}
#define NUMCHARS 37
@@ -148,6 +197,17 @@
return d;
}
+data load_data_captcha_encode(char **paths, int n, int m, int h, int w)
+{
+ if(m) paths = get_random_paths(paths, n, m);
+ data d;
+ d.shallow = 0;
+ d.X = load_image_paths(paths, n, h, w);
+ d.X.cols = 17100;
+ d.y = d.X;
+ if(m) free(paths);
+ return d;
+}
void fill_truth(char *path, char **labels, int k, float *truth)
{
@@ -207,20 +267,20 @@
}
}
-data load_data_detection_jitter_random(int n, char **paths, int m, int classes, int h, int w, int nh, int nw, int jitter)
+data load_data_detection_jitter_random(int n, char **paths, int m, int classes, int h, int w, int nh, int nw, int jitter, int background)
{
char **random_paths = get_random_paths(paths, n, m);
int i;
data d;
d.shallow = 0;
d.X = load_image_paths(random_paths, n, h, w);
- int k = nh*nw*(4+classes);
+ int k = nh*nw*(4+classes+background);
d.y = make_matrix(n, k);
for(i = 0; i < n; ++i){
int dx = rand()%jitter;
int dy = rand()%jitter;
int flip = rand()%2;
- fill_truth_detection(random_paths[i], d.y.vals[i], classes, h-jitter, w-jitter, nh, nw, dy, dx, jitter, flip);
+ fill_truth_detection(random_paths[i], d.y.vals[i], classes, h-jitter, w-jitter, nh, nw, dy, dx, jitter, flip, background);
image a = float_to_image(h, w, 3, d.X.vals[i]);
if(flip) flip_image(a);
jitter_image(a,h-jitter,w-jitter,dy,dx);
@@ -232,15 +292,16 @@
void *load_detection_thread(void *ptr)
{
+ printf("Loading data: %d\n", rand());
struct load_args a = *(struct load_args*)ptr;
- *a.d = load_data_detection_jitter_random(a.n, a.paths, a.m, a.classes, a.h, a.w, a.nh, a.nw, a.jitter);
+ *a.d = load_data_detection_jitter_random(a.n, a.paths, a.m, a.classes, a.h, a.w, a.nh, a.nw, a.jitter, a.background);
translate_data_rows(*a.d, -128);
scale_data_rows(*a.d, 1./128);
free(ptr);
return 0;
}
-pthread_t load_data_detection_thread(int n, char **paths, int m, int classes, int h, int w, int nh, int nw, int jitter, data *d)
+pthread_t load_data_detection_thread(int n, char **paths, int m, int classes, int h, int w, int nh, int nw, int jitter, int background, data *d)
{
pthread_t thread;
struct load_args *args = calloc(1, sizeof(struct load_args));
@@ -253,6 +314,7 @@
args->nw = nw;
args->classes = classes;
args->jitter = jitter;
+ args->background = background;
args->d = d;
if(pthread_create(&thread, 0, load_detection_thread, args)) {
error("Thread creation failed");
--
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