From d97331b88ff3d50035b1e22c9d0eb671b61227e3 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Wed, 15 Apr 2015 07:32:32 +0000
Subject: [PATCH] level adjustment for images
---
src/data.c | 39 +++++++++++++++++++++++----------------
1 files changed, 23 insertions(+), 16 deletions(-)
diff --git a/src/data.c b/src/data.c
index 34108f6..012d7cf 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]);
}
@@ -57,12 +59,6 @@
for(i = 0; i < n; ++i){
image im = load_image_color(paths[i], w, h);
- translate_image(im, -128);
- scale_image(im, 1./128);
- float rad = rand_uniform() - .5;
- image rot = rotate_image(im, rad);
- free_image(im);
- im = rot;
X.vals[i] = im.data;
X.cols = im.h*im.w*im.c;
}
@@ -106,7 +102,7 @@
int i;
for(i = 0; i < n; ++i){
box swap = b[i];
- int index = rand()%n;
+ int index = rand_r(&data_seed)%n;
b[i] = b[index];
b[index] = swap;
}
@@ -298,6 +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;
@@ -314,8 +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;
@@ -334,11 +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;
}
@@ -439,7 +446,7 @@
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);
@@ -450,7 +457,7 @@
{
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));
}
@@ -495,7 +502,7 @@
fclose(fp);
}
//normalize_data_rows(d);
- translate_data_rows(d, -144);
+ translate_data_rows(d, -128);
scale_data_rows(d, 1./128);
return d;
}
@@ -504,7 +511,7 @@
{
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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