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darknet
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sqrt

This commit is contained in:
Joseph Redmon 2015-04-01 10:25:50 -07:00
parent 81751b47dd
commit a05c4bd2e9
4 changed files with 103 additions and 49 deletions
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95
src/data.c
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@ -17,7 +17,6 @@ struct load_args{
int nh;
int nw;
int num_boxes;
int jitter;
int classes;
int background;
data *d;
@ -115,6 +114,7 @@ void fill_truth_detection(char *path, float *truth, int classes, int num_boxes,
box *boxes = read_boxes(labelpath, &count);
randomize_boxes(boxes, count);
float x,y,w,h;
float left, top, right, bot;
int id;
int i;
if(background){
@ -123,22 +123,29 @@ void fill_truth_detection(char *path, float *truth, int classes, int num_boxes,
}
}
for(i = 0; i < count; ++i){
x = boxes[i].x;
y = boxes[i].y;
w = boxes[i].w;
h = boxes[i].h;
left = boxes[i].left * sx - dx;
right = boxes[i].right * sx - dx;
top = boxes[i].top * sy - dy;
bot = boxes[i].bottom* sy - dy;
id = boxes[i].id;
if(flip){
x = 1-x;
float swap = left;
left = 1. - right;
right = 1. - swap;
}
x = x*sx-dx;
y = y*sy-dy;
w = w*sx;
h = h*sy;
if (x < 0 || x >= 1 || y < 0 || y >= 1) continue;
left = constrain(0, 1, left);
right = constrain(0, 1, right);
top = constrain(0, 1, top);
bot = constrain(0, 1, bot);
x = (left+right)/2;
y = (top+bot)/2;
w = (right - left);
h = (bot - top);
if (x <= 0 || x >= 1 || y <= 0 || y >= 1) continue;
int i = (int)(x*num_boxes);
int j = (int)(y*num_boxes);
@ -146,8 +153,18 @@ void fill_truth_detection(char *path, float *truth, int classes, int num_boxes,
x = x*num_boxes - i;
y = y*num_boxes - j;
/*
float maxwidth = distance_from_edge(i, num_boxes);
float maxheight = distance_from_edge(j, num_boxes);
w = w/maxwidth;
h = h/maxheight;
*/
w = constrain(0, 1, w);
h = constrain(0, 1, h);
if (w == 0 || h == 0) continue;
w = sqrt(w);
h = sqrt(h);
int index = (i+j*num_boxes)*(4+classes+background);
if(truth[index+classes+background+2]) continue;
@ -156,8 +173,8 @@ void fill_truth_detection(char *path, float *truth, int classes, int num_boxes,
index += classes;
truth[index++] = y;
truth[index++] = x;
truth[index++] = w;
truth[index++] = h;
truth[index++] = w;
}
free(boxes);
}
@ -274,32 +291,49 @@ void free_data(data d)
}
}
data load_data_detection_jitter_random(int n, char **paths, int m, int classes, int h, int w, int num_boxes, int jitter, int background)
data load_data_detection_jitter_random(int n, char **paths, int m, int classes, int h, int w, int num_boxes, int background)
{
//float minscale = 0.85;
//float maxscale = 1.15;
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);
d.X.rows = n;
d.X.vals = calloc(d.X.rows, sizeof(float*));
d.X.cols = h*w*3;
int k = num_boxes*num_boxes*(4+classes+background);
d.y = make_matrix(n, k);
for(i = 0; i < n; ++i){
int px = rand()%jitter;
px = 0;
int py = rand()%jitter;
py = 0;
float sy = (float) h / (h-jitter);
float sx = (float) w / (w-jitter);
float dy = (float) py / (h-jitter);
float dx = (float) px / (w-jitter);
image orig = load_image_color(random_paths[i], 0, 0);
int oh = orig.h;
int ow = orig.w;
int pleft = (rand_uniform() * 64. - 32.);
int pright = (rand_uniform() * 64. - 32.);
int ptop = (rand_uniform() * 64. - 32.);
int pbot = (rand_uniform() * 64. - 32.);
int swidth = ow - pleft - pright;
int sheight = oh - ptop - pbot;
float sx = (float)swidth / ow;
float sy = (float)sheight / oh;
int flip = rand()%2;
fill_truth_detection(random_paths[i], d.y.vals[i], classes, num_boxes, flip, background, dx, dy, sx, sy);
image a = float_to_image(h, w, 3, d.X.vals[i]);
if(flip) flip_image(a);
jitter_image(a, h-jitter, w-jitter, py, px);
image cropped = crop_image(orig, ptop, pleft, sheight, swidth);
float dx = ((float)pleft/ow)/sx;
float dy = ((float)ptop /oh)/sy;
free_image(orig);
image sized = resize_image(cropped, h, w);
free_image(cropped);
if(flip) flip_image(sized);
d.X.vals[i] = sized.data;
fill_truth_detection(random_paths[i], d.y.vals[i], classes, num_boxes, flip, background, dx, dy, 1./sx, 1./sy);
}
d.X.cols = (h-jitter)*(w-jitter)*3;
free(random_paths);
return d;
}
@ -308,14 +342,14 @@ 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.num_boxes, a.jitter, a.background);
*a.d = load_data_detection_jitter_random(a.n, a.paths, a.m, a.classes, a.h, a.w, a.num_boxes, 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, int background, 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 background, data *d)
{
pthread_t thread;
struct load_args *args = calloc(1, sizeof(struct load_args));
@ -328,7 +362,6 @@ pthread_t load_data_detection_thread(int n, char **paths, int m, int classes, in
args->nw = nw;
args->num_boxes = nw;
args->classes = classes;
args->jitter = jitter;
args->background = background;
args->d = d;
if(pthread_create(&thread, 0, load_detection_thread, args)) {

16
src/data.h
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@ -5,6 +5,18 @@
#include "matrix.h"
#include "list.h"
static inline float distance_from_edge(int x, int max)
{
int dx = (max/2) - x;
if (dx < 0) dx = -dx;
dx = (max/2) + 1 - dx;
dx *= 2;
float dist = (float)dx/max;
if (dist > 1) dist = 1;
return dist;
}
typedef struct{
matrix X;
matrix y;
@ -20,8 +32,8 @@ data load_data_captcha_encode(char **paths, int n, int m, int h, int w);
data load_data(char **paths, int n, int m, char **labels, int k, int h, int w);
pthread_t load_data_thread(char **paths, int n, int m, char **labels, int k, int h, int w, 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);
data load_data_detection_jitter_random(int n, char **paths, int m, int classes, int h, int w, int num_boxes, int jitter, int background);
pthread_t load_data_detection_thread(int n, char **paths, int m, int classes, int h, int w, int nh, int nw, int background, data *d);
data load_data_detection_jitter_random(int n, char **paths, int m, int classes, int h, int w, int num_boxes, int background);
data load_data_image_pathfile(char *filename, char **labels, int k, int h, int w);
data load_cifar10_data(char *filename);

39
src/detection.c
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@ -26,11 +26,21 @@ void draw_detection(image im, float *box, int side)
float green = get_color(1,class,classes);
float blue = get_color(2,class,classes);
//float maxheight = distance_from_edge(r, side);
//float maxwidth = distance_from_edge(c, side);
j += classes;
int left = box[j] *im.w;
int right = box[j+1]*im.w;
int top = box[j+2]*im.h;
int bot = box[j+3]*im.h;
float y = box[j+0];
float x = box[j+1];
x = (x+c)/side;
y = (y+r)/side;
float h = box[j+2]; //*maxheight;
float w = box[j+3]; //*maxwidth;
//printf("coords %f %f %f %f\n", x, y, w, h);
int left = (x-w/2)*im.w;
int right = (x+w/2)*im.w;
int top = (y-h/2)*im.h;
int bot = (y+h/2)*im.h;
draw_box(im, left, top, right, bot, red, green, blue);
}
}
@ -59,25 +69,20 @@ void train_detection(char *cfgfile, char *weightfile)
char **paths = (char **)list_to_array(plist);
printf("%d\n", plist->size);
data train, buffer;
int im_dim = 512;
int jitter = 64;
int im_dim = 448;
int classes = 20;
int background = 1;
pthread_t load_thread = load_data_detection_thread(imgs, paths, plist->size, classes, im_dim, im_dim, 7, 7, jitter, background, &buffer);
pthread_t load_thread = load_data_detection_thread(imgs, paths, plist->size, classes, im_dim, im_dim, 7, 7, background, &buffer);
clock_t time;
while(1){
i += 1;
time=clock();
pthread_join(load_thread, 0);
train = buffer;
load_thread = load_data_detection_thread(imgs, paths, plist->size, classes, im_dim, im_dim, 7, 7, jitter, background, &buffer);
load_thread = load_data_detection_thread(imgs, paths, plist->size, classes, im_dim, im_dim, 7, 7, background, &buffer);
/*
image im = float_to_image(im_dim - jitter, im_dim-jitter, 3, train.X.vals[114]);
draw_detection(im, train.y.vals[114], 7);
show_image(im, "truth");
cvWaitKey(0);
*/
//image im = float_to_image(im_dim, im_dim, 3, train.X.vals[114]);
//draw_detection(im, train.y.vals[114], 7);
printf("Loaded: %lf seconds\n", sec(clock()-time));
time=clock();
@ -147,8 +152,10 @@ void validate_detection(char *cfgfile, char *weightfile)
int ci = k+classes+background+nuisance;
float y = (pred.vals[j][ci + 0] + row)/num_boxes;
float x = (pred.vals[j][ci + 1] + col)/num_boxes;
float h = pred.vals[j][ci + 2];
float w = pred.vals[j][ci + 3];
float h = pred.vals[j][ci + 2]; //* distance_from_edge(row, num_boxes);
h = h*h;
float w = pred.vals[j][ci + 3]; //* distance_from_edge(col, num_boxes);
w = w*w;
printf("%d %d %f %f %f %f %f\n", (i-1)*m/splits + j, class, scale*pred.vals[j][k+class+background+nuisance], y, x, h, w);
}
}

2
src/image.h
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@ -17,6 +17,8 @@ void flip_image(image a);
void draw_box(image a, int x1, int y1, int x2, int y2, float r, float g, float b);
image image_distance(image a, image b);
void scale_image(image m, float s);
image crop_image(image im, int dr, int dc, int h, int w);
image resize_image(image im, int h, int w);
void translate_image(image m, float s);
void normalize_image(image p);
void z_normalize_image(image p);