From 0b2be9d76a369e28fd1fc384b3952621921c9ae5 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Sun, 12 Jul 2015 05:52:43 +0000
Subject: [PATCH] Small version of YOLO, ~1GB RAM
---
src/detection_layer.c | 427 +++++++++++++++--------------------------------------
1 files changed, 120 insertions(+), 307 deletions(-)
diff --git a/src/detection_layer.c b/src/detection_layer.c
index 7eaabb4..9ef89d9 100644
--- a/src/detection_layer.c
+++ b/src/detection_layer.c
@@ -2,382 +2,195 @@
#include "activations.h"
#include "softmax_layer.h"
#include "blas.h"
+#include "box.h"
#include "cuda.h"
#include "utils.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
-int get_detection_layer_locations(detection_layer layer)
+int get_detection_layer_locations(detection_layer l)
{
- return layer.inputs / (layer.classes+layer.coords+layer.rescore+layer.background);
+ return l.inputs / (l.classes+l.coords+l.joint+(l.background || l.objectness));
}
-int get_detection_layer_output_size(detection_layer layer)
+int get_detection_layer_output_size(detection_layer l)
{
- return get_detection_layer_locations(layer)*(layer.background + layer.classes + layer.coords);
+ return get_detection_layer_locations(l)*((l.background || l.objectness) + l.classes + l.coords);
}
-detection_layer *make_detection_layer(int batch, int inputs, int classes, int coords, int rescore, int background, int nuisance)
+detection_layer make_detection_layer(int batch, int inputs, int classes, int coords, int joint, int rescore, int background, int objectness)
{
- detection_layer *layer = calloc(1, sizeof(detection_layer));
+ detection_layer l = {0};
+ l.type = DETECTION;
- layer->batch = batch;
- layer->inputs = inputs;
- layer->classes = classes;
- layer->coords = coords;
- layer->rescore = rescore;
- layer->nuisance = nuisance;
- layer->cost = calloc(1, sizeof(float));
- layer->does_cost=1;
- layer->background = background;
- int outputs = get_detection_layer_output_size(*layer);
- layer->output = calloc(batch*outputs, sizeof(float));
- layer->delta = calloc(batch*outputs, sizeof(float));
+ l.batch = batch;
+ l.inputs = inputs;
+ l.classes = classes;
+ l.coords = coords;
+ l.rescore = rescore;
+ l.objectness = objectness;
+ l.background = background;
+ l.joint = joint;
+ l.cost = calloc(1, sizeof(float));
+ l.does_cost=1;
+ int outputs = get_detection_layer_output_size(l);
+ l.outputs = outputs;
+ l.output = calloc(batch*outputs, sizeof(float));
+ l.delta = calloc(batch*outputs, sizeof(float));
#ifdef GPU
- layer->output_gpu = cuda_make_array(0, batch*outputs);
- layer->delta_gpu = cuda_make_array(0, batch*outputs);
+ l.output_gpu = cuda_make_array(0, batch*outputs);
+ l.delta_gpu = cuda_make_array(0, batch*outputs);
#endif
fprintf(stderr, "Detection Layer\n");
srand(0);
- return layer;
+ return l;
}
-void dark_zone(detection_layer layer, int class, int start, network_state state)
-{
- int index = start+layer.background+class;
- int size = layer.classes+layer.coords+layer.background;
- int location = (index%(7*7*size)) / size ;
- int r = location / 7;
- int c = location % 7;
- int dr, dc;
- for(dr = -1; dr <= 1; ++dr){
- for(dc = -1; dc <= 1; ++dc){
- if(!(dr || dc)) continue;
- if((r + dr) > 6 || (r + dr) < 0) continue;
- if((c + dc) > 6 || (c + dc) < 0) continue;
- int di = (dr*7 + dc) * size;
- if(state.truth[index+di]) continue;
- layer.output[index + di] = 0;
- //if(!state.truth[start+di]) continue;
- //layer.output[start + di] = 1;
- }
- }
-}
-
-typedef struct{
- float dx, dy, dw, dh;
-} dbox;
-
-dbox derivative(box a, box b)
-{
- dbox d;
- d.dx = 0;
- d.dw = 0;
- float l1 = a.x - a.w/2;
- float l2 = b.x - b.w/2;
- if (l1 > l2){
- d.dx -= 1;
- d.dw += .5;
- }
- float r1 = a.x + a.w/2;
- float r2 = b.x + b.w/2;
- if(r1 < r2){
- d.dx += 1;
- d.dw += .5;
- }
- if (l1 > r2) {
- d.dx = -1;
- d.dw = 0;
- }
- if (r1 < l2){
- d.dx = 1;
- d.dw = 0;
- }
-
- d.dy = 0;
- d.dh = 0;
- float t1 = a.y - a.h/2;
- float t2 = b.y - b.h/2;
- if (t1 > t2){
- d.dy -= 1;
- d.dh += .5;
- }
- float b1 = a.y + a.h/2;
- float b2 = b.y + b.h/2;
- if(b1 < b2){
- d.dy += 1;
- d.dh += .5;
- }
- if (t1 > b2) {
- d.dy = -1;
- d.dh = 0;
- }
- if (b1 < t2){
- d.dy = 1;
- d.dh = 0;
- }
- return d;
-}
-
-float overlap(float x1, float w1, float x2, float w2)
-{
- float l1 = x1 - w1/2;
- float l2 = x2 - w2/2;
- float left = l1 > l2 ? l1 : l2;
- float r1 = x1 + w1/2;
- float r2 = x2 + w2/2;
- float right = r1 < r2 ? r1 : r2;
- return right - left;
-}
-
-float box_intersection(box a, box b)
-{
- float w = overlap(a.x, a.w, b.x, b.w);
- float h = overlap(a.y, a.h, b.y, b.h);
- if(w < 0 || h < 0) return 0;
- float area = w*h;
- return area;
-}
-
-float box_union(box a, box b)
-{
- float i = box_intersection(a, b);
- float u = a.w*a.h + b.w*b.h - i;
- return u;
-}
-
-float box_iou(box a, box b)
-{
- return box_intersection(a, b)/box_union(a, b);
-}
-
-dbox dintersect(box a, box b)
-{
- float w = overlap(a.x, a.w, b.x, b.w);
- float h = overlap(a.y, a.h, b.y, b.h);
- dbox dover = derivative(a, b);
- dbox di;
-
- di.dw = dover.dw*h;
- di.dx = dover.dx*h;
- di.dh = dover.dh*w;
- di.dy = dover.dy*w;
- if(h < 0 || w < 0){
- di.dx = dover.dx;
- di.dy = dover.dy;
- }
- return di;
-}
-
-dbox dunion(box a, box b)
-{
- dbox du = {0,0,0,0};;
- float w = overlap(a.x, a.w, b.x, b.w);
- float h = overlap(a.y, a.h, b.y, b.h);
- if(w > 0 && h > 0){
- dbox di = dintersect(a, b);
- du.dw = h - di.dw;
- du.dh = w - di.dw;
- du.dx = -di.dx;
- du.dy = -di.dy;
- }
- return du;
-}
-
-dbox diou(box a, box b)
-{
- float u = box_union(a,b);
- float i = box_intersection(a,b);
- dbox di = dintersect(a,b);
- dbox du = dunion(a,b);
- dbox dd = {0,0,0,0};
- if(i < 0) {
- dd.dx = b.x - a.x;
- dd.dy = b.y - a.y;
- dd.dw = b.w - a.w;
- dd.dh = b.h - a.h;
- return dd;
- }
- dd.dx = 2*pow((1-(i/u)),1)*(di.dx*u - du.dx*i)/(u*u);
- dd.dy = 2*pow((1-(i/u)),1)*(di.dy*u - du.dy*i)/(u*u);
- dd.dw = 2*pow((1-(i/u)),1)*(di.dw*u - du.dw*i)/(u*u);
- dd.dh = 2*pow((1-(i/u)),1)*(di.dh*u - du.dh*i)/(u*u);
- return dd;
-}
-
-void test_box()
-{
- box a = {1, 1, 1, 1};
- box b = {0, 0, .5, .2};
- int count = 0;
- while(count++ < 300){
- dbox d = diou(a, b);
- printf("%f %f %f %f\n", a.x, a.y, a.w, a.h);
- a.x += .1*d.dx;
- a.w += .1*d.dw;
- a.y += .1*d.dy;
- a.h += .1*d.dh;
- printf("inter: %f\n", box_intersection(a, b));
- printf("union: %f\n", box_union(a, b));
- printf("IOU: %f\n", box_iou(a, b));
- if(d.dx==0 && d.dw==0 && d.dy==0 && d.dh==0) {
- printf("break!!!\n");
- break;
- }
- }
-}
-
-void forward_detection_layer(const detection_layer layer, network_state state)
+void forward_detection_layer(const detection_layer l, network_state state)
{
int in_i = 0;
int out_i = 0;
- int locations = get_detection_layer_locations(layer);
+ int locations = get_detection_layer_locations(l);
int i,j;
- for(i = 0; i < layer.batch*locations; ++i){
- int mask = (!state.truth || state.truth[out_i + layer.background + layer.classes + 2]);
+ for(i = 0; i < l.batch*locations; ++i){
+ int mask = (!state.truth || state.truth[out_i + (l.background || l.objectness) + l.classes + 2]);
float scale = 1;
- if(layer.rescore) scale = state.input[in_i++];
- else if(layer.nuisance){
- layer.output[out_i++] = 1-state.input[in_i++];
+ if(l.joint) scale = state.input[in_i++];
+ else if(l.objectness){
+ l.output[out_i++] = 1-state.input[in_i++];
scale = mask;
}
- else if(layer.background) layer.output[out_i++] = scale*state.input[in_i++];
+ else if(l.background) l.output[out_i++] = scale*state.input[in_i++];
- for(j = 0; j < layer.classes; ++j){
- layer.output[out_i++] = scale*state.input[in_i++];
+ for(j = 0; j < l.classes; ++j){
+ l.output[out_i++] = scale*state.input[in_i++];
}
- if(layer.nuisance){
-
- }else if(layer.background){
- softmax_array(layer.output + out_i - layer.classes-layer.background, layer.classes+layer.background, layer.output + out_i - layer.classes-layer.background);
- activate_array(state.input+in_i, layer.coords, LOGISTIC);
+ if(l.objectness){
+
+ }else if(l.background){
+ softmax_array(l.output + out_i - l.classes-l.background, l.classes+l.background, l.output + out_i - l.classes-l.background);
+ activate_array(state.input+in_i, l.coords, LOGISTIC);
}
- for(j = 0; j < layer.coords; ++j){
- layer.output[out_i++] = mask*state.input[in_i++];
+ for(j = 0; j < l.coords; ++j){
+ l.output[out_i++] = mask*state.input[in_i++];
}
}
- if(layer.does_cost){
- *(layer.cost) = 0;
- int size = get_detection_layer_output_size(layer) * layer.batch;
- memset(layer.delta, 0, size * sizeof(float));
- for(i = 0; i < layer.batch*locations; ++i){
- int classes = layer.nuisance+layer.classes;
- int offset = i*(classes+layer.coords);
- for(j = offset; j < offset+classes; ++j){
- *(layer.cost) += pow(state.truth[j] - layer.output[j], 2);
- layer.delta[j] = state.truth[j] - layer.output[j];
+ float avg_iou = 0;
+ int count = 0;
+ if(l.does_cost && state.train){
+ *(l.cost) = 0;
+ int size = get_detection_layer_output_size(l) * l.batch;
+ memset(l.delta, 0, size * sizeof(float));
+ for (i = 0; i < l.batch*locations; ++i) {
+ int classes = l.objectness+l.classes;
+ int offset = i*(classes+l.coords);
+ for (j = offset; j < offset+classes; ++j) {
+ *(l.cost) += pow(state.truth[j] - l.output[j], 2);
+ l.delta[j] = state.truth[j] - l.output[j];
}
+
box truth;
- truth.x = state.truth[j+0];
- truth.y = state.truth[j+1];
- truth.w = state.truth[j+2];
- truth.h = state.truth[j+3];
+ truth.x = state.truth[j+0]/7;
+ truth.y = state.truth[j+1]/7;
+ truth.w = pow(state.truth[j+2], 2);
+ truth.h = pow(state.truth[j+3], 2);
box out;
- out.x = layer.output[j+0];
- out.y = layer.output[j+1];
- out.w = layer.output[j+2];
- out.h = layer.output[j+3];
+ out.x = l.output[j+0]/7;
+ out.y = l.output[j+1]/7;
+ out.w = pow(l.output[j+2], 2);
+ out.h = pow(l.output[j+3], 2);
+
if(!(truth.w*truth.h)) continue;
- float iou = box_iou(truth, out);
- //printf("iou: %f\n", iou);
- *(layer.cost) += pow((1-iou), 2);
- dbox d = diou(out, truth);
- layer.delta[j+0] = d.dx;
- layer.delta[j+1] = d.dy;
- layer.delta[j+2] = d.dw;
- layer.delta[j+3] = d.dh;
+ float iou = box_iou(out, truth);
+ avg_iou += iou;
+ ++count;
+ dbox delta = diou(out, truth);
+
+ l.delta[j+0] = 10 * delta.dx/7;
+ l.delta[j+1] = 10 * delta.dy/7;
+ l.delta[j+2] = 10 * delta.dw * 2 * sqrt(out.w);
+ l.delta[j+3] = 10 * delta.dh * 2 * sqrt(out.h);
+
+
+ *(l.cost) += pow((1-iou), 2);
+ l.delta[j+0] = 4 * (state.truth[j+0] - l.output[j+0]);
+ l.delta[j+1] = 4 * (state.truth[j+1] - l.output[j+1]);
+ l.delta[j+2] = 4 * (state.truth[j+2] - l.output[j+2]);
+ l.delta[j+3] = 4 * (state.truth[j+3] - l.output[j+3]);
+ if(l.rescore){
+ for (j = offset; j < offset+classes; ++j) {
+ if(state.truth[j]) state.truth[j] = iou;
+ l.delta[j] = state.truth[j] - l.output[j];
+ }
+ }
}
+ printf("Avg IOU: %f\n", avg_iou/count);
}
- /*
- int count = 0;
- for(i = 0; i < layer.batch*locations; ++i){
- for(j = 0; j < layer.classes+layer.background; ++j){
- printf("%f, ", layer.output[count++]);
- }
- printf("\n");
- for(j = 0; j < layer.coords; ++j){
- printf("%f, ", layer.output[count++]);
- }
- printf("\n");
- }
- */
- /*
- if(layer.background || 1){
- for(i = 0; i < layer.batch*locations; ++i){
- int index = i*(layer.classes+layer.coords+layer.background);
- for(j= 0; j < layer.classes; ++j){
- if(state.truth[index+j+layer.background]){
-//dark_zone(layer, j, index, state);
-}
-}
-}
-}
- */
}
-void backward_detection_layer(const detection_layer layer, network_state state)
+void backward_detection_layer(const detection_layer l, network_state state)
{
- int locations = get_detection_layer_locations(layer);
+ int locations = get_detection_layer_locations(l);
int i,j;
int in_i = 0;
int out_i = 0;
- for(i = 0; i < layer.batch*locations; ++i){
+ for(i = 0; i < l.batch*locations; ++i){
float scale = 1;
float latent_delta = 0;
- if(layer.rescore) scale = state.input[in_i++];
- else if (layer.nuisance) state.delta[in_i++] = -layer.delta[out_i++];
- else if (layer.background) state.delta[in_i++] = scale*layer.delta[out_i++];
- for(j = 0; j < layer.classes; ++j){
- latent_delta += state.input[in_i]*layer.delta[out_i];
- state.delta[in_i++] = scale*layer.delta[out_i++];
+ if(l.joint) scale = state.input[in_i++];
+ else if (l.objectness) state.delta[in_i++] = -l.delta[out_i++];
+ else if (l.background) state.delta[in_i++] = scale*l.delta[out_i++];
+ for(j = 0; j < l.classes; ++j){
+ latent_delta += state.input[in_i]*l.delta[out_i];
+ state.delta[in_i++] = scale*l.delta[out_i++];
}
- if (layer.nuisance) {
+ if (l.objectness) {
- }else if (layer.background) gradient_array(layer.output + out_i, layer.coords, LOGISTIC, layer.delta + out_i);
- for(j = 0; j < layer.coords; ++j){
- state.delta[in_i++] = layer.delta[out_i++];
+ }else if (l.background) gradient_array(l.output + out_i, l.coords, LOGISTIC, l.delta + out_i);
+ for(j = 0; j < l.coords; ++j){
+ state.delta[in_i++] = l.delta[out_i++];
}
- if(layer.rescore) state.delta[in_i-layer.coords-layer.classes-layer.rescore-layer.background] = latent_delta;
+ if(l.joint) state.delta[in_i-l.coords-l.classes-l.joint] = latent_delta;
}
}
#ifdef GPU
-void forward_detection_layer_gpu(const detection_layer layer, network_state state)
+void forward_detection_layer_gpu(const detection_layer l, network_state state)
{
- int outputs = get_detection_layer_output_size(layer);
- float *in_cpu = calloc(layer.batch*layer.inputs, sizeof(float));
+ int outputs = get_detection_layer_output_size(l);
+ float *in_cpu = calloc(l.batch*l.inputs, sizeof(float));
float *truth_cpu = 0;
if(state.truth){
- truth_cpu = calloc(layer.batch*outputs, sizeof(float));
- cuda_pull_array(state.truth, truth_cpu, layer.batch*outputs);
+ truth_cpu = calloc(l.batch*outputs, sizeof(float));
+ cuda_pull_array(state.truth, truth_cpu, l.batch*outputs);
}
- cuda_pull_array(state.input, in_cpu, layer.batch*layer.inputs);
+ cuda_pull_array(state.input, in_cpu, l.batch*l.inputs);
network_state cpu_state;
cpu_state.train = state.train;
cpu_state.truth = truth_cpu;
cpu_state.input = in_cpu;
- forward_detection_layer(layer, cpu_state);
- cuda_push_array(layer.output_gpu, layer.output, layer.batch*outputs);
- cuda_push_array(layer.delta_gpu, layer.delta, layer.batch*outputs);
+ forward_detection_layer(l, cpu_state);
+ cuda_push_array(l.output_gpu, l.output, l.batch*outputs);
+ cuda_push_array(l.delta_gpu, l.delta, l.batch*outputs);
free(cpu_state.input);
if(cpu_state.truth) free(cpu_state.truth);
}
-void backward_detection_layer_gpu(detection_layer layer, network_state state)
+void backward_detection_layer_gpu(detection_layer l, network_state state)
{
- int outputs = get_detection_layer_output_size(layer);
+ int outputs = get_detection_layer_output_size(l);
- float *in_cpu = calloc(layer.batch*layer.inputs, sizeof(float));
- float *delta_cpu = calloc(layer.batch*layer.inputs, sizeof(float));
+ float *in_cpu = calloc(l.batch*l.inputs, sizeof(float));
+ float *delta_cpu = calloc(l.batch*l.inputs, sizeof(float));
float *truth_cpu = 0;
if(state.truth){
- truth_cpu = calloc(layer.batch*outputs, sizeof(float));
- cuda_pull_array(state.truth, truth_cpu, layer.batch*outputs);
+ truth_cpu = calloc(l.batch*outputs, sizeof(float));
+ cuda_pull_array(state.truth, truth_cpu, l.batch*outputs);
}
network_state cpu_state;
cpu_state.train = state.train;
@@ -385,10 +198,10 @@
cpu_state.truth = truth_cpu;
cpu_state.delta = delta_cpu;
- cuda_pull_array(state.input, in_cpu, layer.batch*layer.inputs);
- cuda_pull_array(layer.delta_gpu, layer.delta, layer.batch*outputs);
- backward_detection_layer(layer, cpu_state);
- cuda_push_array(state.delta, delta_cpu, layer.batch*layer.inputs);
+ cuda_pull_array(state.input, in_cpu, l.batch*l.inputs);
+ cuda_pull_array(l.delta_gpu, l.delta, l.batch*outputs);
+ backward_detection_layer(l, cpu_state);
+ cuda_push_array(state.delta, delta_cpu, l.batch*l.inputs);
free(in_cpu);
free(delta_cpu);
--
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