darknet/src/cnn.c

#include "connected_layer.h"
#include "convolutional_layer.h"
#include "maxpool_layer.h"
#include "network.h"
#include "image.h"
#include "parser.h"
#include "data.h"
#include "matrix.h"
#include "utils.h"
#include "mini_blas.h"

#include <time.h>
#include <stdlib.h>
#include <stdio.h>

#define _GNU_SOURCE
#include <fenv.h>

void test_convolve()
{
	image dog = load_image("dog.jpg",300,400);
	printf("dog channels %d\n", dog.c);
	image kernel = make_random_image(3,3,dog.c);
	image edge = make_image(dog.h, dog.w, 1);
	int i;
	clock_t start = clock(), end;
	for(i = 0; i < 1000; ++i){
		convolve(dog, kernel, 1, 0, edge, 1);
	}
	end = clock();
	printf("Convolutions: %lf seconds\n", (float)(end-start)/CLOCKS_PER_SEC);
	show_image_layers(edge, "Test Convolve");
}

#ifdef GPU

void test_convolutional_layer()
{
    int i;
	image dog = load_image("data/dog.jpg",256,256);
	network net = parse_network_cfg("cfg/convolutional.cfg");
//    data test = load_cifar10_data("data/cifar10/test_batch.bin");
//    float *X = calloc(net.batch*test.X.cols, sizeof(float));
//    float *y = calloc(net.batch*test.y.cols, sizeof(float));
    int in_size = get_network_input_size(net)*net.batch;
    int size = get_network_output_size(net)*net.batch;
float *X = calloc(in_size, sizeof(float));
    for(i = 0; i < in_size; ++i){
        X[i] = dog.data[i%get_network_input_size(net)];
    }
//    get_batch(test, net.batch, X, y);
    clock_t start, end;
    cl_mem input_cl = cl_make_array(X, in_size);

    forward_network_gpu(net, input_cl, 1);
    start = clock();
    forward_network_gpu(net, input_cl, 1);
    end = clock();
    float gpu_sec = (float)(end-start)/CLOCKS_PER_SEC;
    float *gpu_out = calloc(size, sizeof(float));
    memcpy(gpu_out, get_network_output(net), size*sizeof(float));

    start = clock();
    forward_network(net, X, 1);
    end = clock();
    float cpu_sec = (float)(end-start)/CLOCKS_PER_SEC;
    float *cpu_out = calloc(size, sizeof(float));
    memcpy(cpu_out, get_network_output(net), size*sizeof(float));

    float sum = 0;
    for(i = 0; i < size; ++i) {
        //printf("%f, %f\n", gpu_out[i], cpu_out[i]);
        sum += pow(gpu_out[i] - cpu_out[i], 2);
    }
    printf("gpu: %f sec, cpu: %f sec, diff: %f, size: %d\n", gpu_sec, cpu_sec, sum, size);
}

#endif

void test_convolve_matrix()
{
	image dog = load_image("dog.jpg",300,400);
	printf("dog channels %d\n", dog.c);

	int size = 11;
	int stride = 4;
	int n = 40;
	float *filters = make_random_image(size, size, dog.c*n).data;

	int mw = ((dog.h-size)/stride+1)*((dog.w-size)/stride+1);
	int mh = (size*size*dog.c);
	float *matrix = calloc(mh*mw, sizeof(float));

	image edge = make_image((dog.h-size)/stride+1, (dog.w-size)/stride+1, n);

	int i;
	clock_t start = clock(), end;
	for(i = 0; i < 1000; ++i){
		im2col_cpu(dog.data,1, dog.c,  dog.h,  dog.w,  size,  stride, 0, matrix);
		gemm(0,0,n,mw,mh,1,filters,mh,matrix,mw,1,edge.data,mw);
	}
	end = clock();
	printf("Convolutions: %lf seconds\n", (float)(end-start)/CLOCKS_PER_SEC);
	show_image_layers(edge, "Test Convolve");
	cvWaitKey(0);
}

void test_color()
{
	image dog = load_image("test_color.png", 300, 400);
	show_image_layers(dog, "Test Color");
}

void verify_convolutional_layer()
{
	srand(0);
	int i;
	int n = 1;
	int stride = 1;
	int size = 3;
	float eps = .00000001;
	image test = make_random_image(5,5, 1);
	convolutional_layer layer = *make_convolutional_layer(1,test.h,test.w,test.c, n, size, stride, 0, RELU,0,0,0);
	image out = get_convolutional_image(layer);
	float **jacobian = calloc(test.h*test.w*test.c, sizeof(float));

	forward_convolutional_layer(layer, test.data);
	image base = copy_image(out);

	for(i = 0; i < test.h*test.w*test.c; ++i){
		test.data[i] += eps;
		forward_convolutional_layer(layer, test.data);
		image partial = copy_image(out);
		subtract_image(partial, base);
		scale_image(partial, 1/eps);
		jacobian[i] = partial.data;
		test.data[i] -= eps;
	}
	float **jacobian2 = calloc(out.h*out.w*out.c, sizeof(float));
	image in_delta = make_image(test.h, test.w, test.c);
	image out_delta = get_convolutional_delta(layer);
	for(i = 0; i < out.h*out.w*out.c; ++i){
		out_delta.data[i] = 1;
		backward_convolutional_layer(layer, in_delta.data);
		image partial = copy_image(in_delta);
		jacobian2[i] = partial.data;
		out_delta.data[i] = 0;
	}
	int j;
	float *j1 = calloc(test.h*test.w*test.c*out.h*out.w*out.c, sizeof(float));
	float *j2 = calloc(test.h*test.w*test.c*out.h*out.w*out.c, sizeof(float));
	for(i = 0; i < test.h*test.w*test.c; ++i){
		for(j =0 ; j < out.h*out.w*out.c; ++j){
			j1[i*out.h*out.w*out.c + j] = jacobian[i][j];
			j2[i*out.h*out.w*out.c + j] = jacobian2[j][i];
			printf("%f %f\n", jacobian[i][j], jacobian2[j][i]);
		}
	}


	image mj1 = float_to_image(test.w*test.h*test.c, out.w*out.h*out.c, 1, j1);
	image mj2 = float_to_image(test.w*test.h*test.c, out.w*out.h*out.c, 1, j2);
	printf("%f %f\n", avg_image_layer(mj1,0), avg_image_layer(mj2,0));
	show_image(mj1, "forward jacobian");
	show_image(mj2, "backward jacobian");
}

void test_load()
{
	image dog = load_image("dog.jpg", 300, 400);
	show_image(dog, "Test Load");
	show_image_layers(dog, "Test Load");
}
void test_upsample()
{
	image dog = load_image("dog.jpg", 300, 400);
	int n = 3;
	image up = make_image(n*dog.h, n*dog.w, dog.c);
	upsample_image(dog, n, up);
	show_image(up, "Test Upsample");
	show_image_layers(up, "Test Upsample");
}

void test_rotate()
{
	int i;
	image dog = load_image("dog.jpg",300,400);
	clock_t start = clock(), end;
	for(i = 0; i < 1001; ++i){
		rotate_image(dog);
	}
	end = clock();
	printf("Rotations: %lf seconds\n", (float)(end-start)/CLOCKS_PER_SEC);
	show_image(dog, "Test Rotate");

	image random = make_random_image(3,3,3);
	show_image(random, "Test Rotate Random");
	rotate_image(random);
	show_image(random, "Test Rotate Random");
	rotate_image(random);
	show_image(random, "Test Rotate Random");
}

void test_parser()
{
	network net = parse_network_cfg("cfg/test_parser.cfg");
    save_network(net, "cfg/test_parser_1.cfg");
	network net2 = parse_network_cfg("cfg/test_parser_1.cfg");
    save_network(net2, "cfg/test_parser_2.cfg");
}

void test_data()
{
	char *labels[] = {"cat","dog"};
	data train = load_data_image_pathfile_random("train_paths.txt", 101,labels, 2, 300, 400);
	free_data(train);
}

void train_full()
{
	network net = parse_network_cfg("cfg/imagenet.cfg");
	srand(2222222);
	int i = 0;
	char *labels[] = {"cat","dog"};
	float lr = .00001;
	float momentum = .9;
	float decay = 0.01;
	while(1){
		i += 1000;
		data train = load_data_image_pathfile_random("images/assira/train.list", 1000, labels, 2, 256, 256);
		//image im = float_to_image(256, 256, 3,train.X.vals[0]);
		//visualize_network(net);
		//cvWaitKey(100);
		//show_image(im, "input");
		//cvWaitKey(100);
		//scale_data_rows(train, 1./255.);
		normalize_data_rows(train);
		clock_t start = clock(), end;
		float loss = train_network_sgd(net, train, 1000);
		end = clock();
		printf("%d: %f, Time: %lf seconds, LR: %f, Momentum: %f, Decay: %f\n", i, loss, (float)(end-start)/CLOCKS_PER_SEC, lr, momentum, decay);
		free_data(train);
		if(i%10000==0){
			char buff[256];
			sprintf(buff, "cfg/assira_backup_%d.cfg", i);
			save_network(net, buff);
		}
		//lr *= .99;
	}
}

void test_visualize()
{
	network net = parse_network_cfg("cfg/voc_imagenet.cfg");
	srand(2222222);
	visualize_network(net);
	cvWaitKey(0);
}
void test_full()
{
	network net = parse_network_cfg("cfg/backup_1300.cfg");
	srand(2222222);
	int i,j;
	int total = 100;
	char *labels[] = {"cat","dog"};
	FILE *fp = fopen("preds.txt","w");
	for(i = 0; i < total; ++i){
		visualize_network(net);
		cvWaitKey(100);
		data test = load_data_image_pathfile_part("images/assira/test.list", i, total, labels, 2, 256, 256);
		image im = float_to_image(256, 256, 3,test.X.vals[0]);
		show_image(im, "input");
		cvWaitKey(100);
		normalize_data_rows(test);
		for(j = 0; j < test.X.rows; ++j){
			float *x = test.X.vals[j];
			forward_network(net, x, 0);
			int class = get_predicted_class_network(net);
			fprintf(fp, "%d\n", class);
		}
		free_data(test);
	}
	fclose(fp);
}

void test_cifar10()
{

    network net = parse_network_cfg("cfg/cifar10_part5.cfg");
    data test = load_cifar10_data("data/cifar10/test_batch.bin");
        clock_t start = clock(), end;
    float test_acc = network_accuracy(net, test);
        end = clock();
    printf("%f in %f Sec\n", test_acc, (float)(end-start)/CLOCKS_PER_SEC);
    visualize_network(net);
    cvWaitKey(0);
}

void train_cifar10()
{
    srand(555555);
    network net = parse_network_cfg("cfg/cifar10.cfg");
    data test = load_cifar10_data("data/cifar10/test_batch.bin");
    int count = 0;
    int iters = 10000/net.batch;
    data train = load_all_cifar10();
    while(++count <= 10000){
        clock_t start = clock(), end;
        float loss = train_network_sgd(net, train, iters);
        end = clock();
        visualize_network(net);
        cvWaitKey(5000);

        //float test_acc = network_accuracy(net, test);
        //printf("%d: Loss: %f, Test Acc: %f, Time: %lf seconds, LR: %f, Momentum: %f, Decay: %f\n", count, loss, test_acc,(float)(end-start)/CLOCKS_PER_SEC, net.learning_rate, net.momentum, net.decay);
        if(count%10 == 0){
            float test_acc = network_accuracy(net, test);
            printf("%d: Loss: %f, Test Acc: %f, Time: %lf seconds, LR: %f, Momentum: %f, Decay: %f\n", count, loss, test_acc,(float)(end-start)/CLOCKS_PER_SEC, net.learning_rate, net.momentum, net.decay);
            char buff[256];
            sprintf(buff, "/home/pjreddie/cifar/cifar2_%d.cfg", count);
            save_network(net, buff);
        }else{
            printf("%d: Loss: %f, Time: %lf seconds, LR: %f, Momentum: %f, Decay: %f\n", count, loss, (float)(end-start)/CLOCKS_PER_SEC, net.learning_rate, net.momentum, net.decay);
        }
    }
    free_data(train);
}

void test_vince()
{
    network net = parse_network_cfg("cfg/vince.cfg");
    data train = load_categorical_data_csv("images/vince.txt", 144, 2);
    normalize_data_rows(train);

    int count = 0;
    //float lr = .00005;
    //float momentum = .9;
    //float decay = 0.0001;
    //decay = 0;
    int batch = 10000;
    while(++count <= 10000){
        float loss = train_network_sgd(net, train, batch);
        printf("%5f %5f\n",(double)count*batch/train.X.rows, loss);
    }
}

void test_nist_single()
{
    srand(222222);
    network net = parse_network_cfg("cfg/nist_single.cfg");
    data train = load_categorical_data_csv("data/mnist/mnist_tiny.csv", 0, 10);
    normalize_data_rows(train);
    float loss = train_network_sgd(net, train, 1);
    printf("Loss: %f, LR: %f, Momentum: %f, Decay: %f\n", loss, net.learning_rate, net.momentum, net.decay);

}

void test_nist()
{
    srand(222222);
    network net = parse_network_cfg("cfg/nist_final.cfg");
    data test = load_categorical_data_csv("data/mnist/mnist_test.csv",0,10);
    translate_data_rows(test, -144);
    clock_t start = clock(), end;
    float test_acc = network_accuracy_multi(net, test,16);
    end = clock();
    printf("Accuracy: %f, Time: %lf seconds\n", test_acc,(float)(end-start)/CLOCKS_PER_SEC);
}

void train_nist()
{
    srand(222222);
    network net = parse_network_cfg("cfg/nist.cfg");
    data train = load_categorical_data_csv("data/mnist/mnist_train.csv", 0, 10);
    data test = load_categorical_data_csv("data/mnist/mnist_test.csv",0,10);
    translate_data_rows(train, -144);
    //scale_data_rows(train, 1./128);
    translate_data_rows(test, -144);
    //scale_data_rows(test, 1./128);
    //randomize_data(train);
    int count = 0;
    //clock_t start = clock(), end;
    int iters = 10000/net.batch;
    while(++count <= 2000){
        clock_t start = clock(), end;
        float loss = train_network_sgd(net, train, iters);
        end = clock();
        float test_acc = network_accuracy(net, test);
        //float test_acc = 0;
        printf("%d: Loss: %f, Test Acc: %f, Time: %lf seconds, LR: %f, Momentum: %f, Decay: %f\n", count, loss, test_acc,(float)(end-start)/CLOCKS_PER_SEC, net.learning_rate, net.momentum, net.decay);
        /*printf("%f %f %f %f %f\n", mean_array(get_network_output_layer(net,0), 100),
          mean_array(get_network_output_layer(net,1), 100),
          mean_array(get_network_output_layer(net,2), 100),
          mean_array(get_network_output_layer(net,3), 100),
          mean_array(get_network_output_layer(net,4), 100));
         */
        //save_network(net, "cfg/nist_final2.cfg");

        //printf("%5d Training Loss: %lf, Params: %f %f %f, ",count*1000, loss, lr, momentum, decay);
        //end = clock();
        //printf("Time: %lf seconds\n", (float)(end-start)/CLOCKS_PER_SEC);
        //start=end;
        //lr *= .5;
    }
    //save_network(net, "cfg/nist_basic_trained.cfg");
}

void test_ensemble()
{
    int i;
    srand(888888);
    data d = load_categorical_data_csv("mnist/mnist_train.csv", 0, 10);
    normalize_data_rows(d);
    data test = load_categorical_data_csv("mnist/mnist_test.csv", 0,10);
    normalize_data_rows(test);
    data train = d;
    //   data *split = split_data(d, 1, 10);
    //   data train = split[0];
    //   data test = split[1];
    matrix prediction = make_matrix(test.y.rows, test.y.cols);
    int n = 30;
    for(i = 0; i < n; ++i){
        int count = 0;
        float lr = .0005;
        float momentum = .9;
        float decay = .01;
        network net = parse_network_cfg("nist.cfg");
        while(++count <= 15){
            float acc = train_network_sgd(net, train, train.X.rows);
            printf("Training Accuracy: %lf Learning Rate: %f Momentum: %f Decay: %f\n", acc, lr, momentum, decay );
            lr /= 2; 
        }
        matrix partial = network_predict_data(net, test);
        float acc = matrix_accuracy(test.y, partial);
        printf("Model Accuracy: %lf\n", acc);
        matrix_add_matrix(partial, prediction);
        acc = matrix_accuracy(test.y, prediction);
        printf("Current Ensemble Accuracy: %lf\n", acc);
        free_matrix(partial);
    }
    float acc = matrix_accuracy(test.y, prediction);
    printf("Full Ensemble Accuracy: %lf\n", acc);
}

void test_random_classify()
{
    network net = parse_network_cfg("connected.cfg");
    matrix m = csv_to_matrix("train.csv");
    //matrix ho = hold_out_matrix(&m, 2500);
    float *truth = pop_column(&m, 0);
    //float *ho_truth = pop_column(&ho, 0);
    int i;
    clock_t start = clock(), end;
    int count = 0;
    while(++count <= 300){
        for(i = 0; i < m.rows; ++i){
            int index = rand()%m.rows;
            //image p = float_to_image(1690,1,1,m.vals[index]);
            //normalize_image(p);
            forward_network(net, m.vals[index], 1);
            float *out = get_network_output(net);
            float *delta = get_network_delta(net);
            //printf("%f\n", out[0]);
            delta[0] = truth[index] - out[0];
            // printf("%f\n", delta[0]);
            //printf("%f %f\n", truth[index], out[0]);
            //backward_network(net, m.vals[index], );
            update_network(net);
        }
        //float test_acc = error_network(net, m, truth);
        //float valid_acc = error_network(net, ho, ho_truth);
        //printf("%f, %f\n", test_acc, valid_acc);
        //fprintf(stderr, "%5d: %f Valid: %f\n",count, test_acc, valid_acc);
        //if(valid_acc > .70) break;
    }
    end = clock();
    FILE *fp = fopen("submission/out.txt", "w");
    matrix test = csv_to_matrix("test.csv");
    truth = pop_column(&test, 0);
    for(i = 0; i < test.rows; ++i){
        forward_network(net, test.vals[i], 0);
        float *out = get_network_output(net);
        if(fabs(out[0]) < .5) fprintf(fp, "0\n");
        else fprintf(fp, "1\n");
    }
    fclose(fp);
    printf("Neural Net Learning: %lf seconds\n", (float)(end-start)/CLOCKS_PER_SEC);
}

void test_split()
{
    data train = load_categorical_data_csv("mnist/mnist_train.csv", 0, 10);
    data *split = split_data(train, 0, 13);
    printf("%d, %d, %d\n", train.X.rows, split[0].X.rows, split[1].X.rows);
}

void test_im2row()
{
    int h = 20;
    int w = 20;
    int c = 3;
    int stride = 1;
    int size = 11;
    image test = make_random_image(h,w,c);
    int mc = 1;
    int mw = ((h-size)/stride+1)*((w-size)/stride+1);
    int mh = (size*size*c);
    int msize = mc*mw*mh;
    float *matrix = calloc(msize, sizeof(float));
    int i;
    for(i = 0; i < 1000; ++i){
        im2col_cpu(test.data,1,  c,  h,  w,  size,  stride, 0, matrix);
        //image render = float_to_image(mh, mw, mc, matrix);
    }
}

void flip_network()
{
    network net = parse_network_cfg("cfg/voc_imagenet_orig.cfg");
    save_network(net, "cfg/voc_imagenet_rev.cfg");
}

void tune_VOC()
{
    network net = parse_network_cfg("cfg/voc_start.cfg");
    srand(2222222);
    int i = 20;
    char *labels[] = {"aeroplane","bicycle","bird","boat","bottle","bus","car","cat","chair","cow","diningtable","dog","horse","motorbike","person","pottedplant","sheep","sofa","train","tvmonitor"};
    float lr = .000005;
    float momentum = .9;
    float decay = 0.0001;
    while(i++ < 1000 || 1){
        data train = load_data_image_pathfile_random("/home/pjreddie/VOC2012/trainval_paths.txt", 10, labels, 20, 256, 256);

        image im = float_to_image(256, 256, 3,train.X.vals[0]);
        show_image(im, "input");
        visualize_network(net);
        cvWaitKey(100);

        translate_data_rows(train, -144);
        clock_t start = clock(), end;
        float loss = train_network_sgd(net, train, 10);
        end = clock();
        printf("%d: %f, Time: %lf seconds, LR: %f, Momentum: %f, Decay: %f\n", i, loss, (float)(end-start)/CLOCKS_PER_SEC, lr, momentum, decay);
        free_data(train);
        /*
           if(i%10==0){
           char buff[256];
           sprintf(buff, "/home/pjreddie/voc_cfg/voc_ramp_%d.cfg", i);
           save_network(net, buff);
           }
         */
        //lr *= .99;
    }
}

int voc_size(int x)
{
    x = x-1+3;
    x = x-1+3;
    x = x-1+3;
    x = (x-1)*2+1;
    x = x-1+5;
    x = (x-1)*2+1;
    x = (x-1)*4+11;
    return x;
}

image features_output_size(network net, IplImage *src, int outh, int outw)
{
    int h = voc_size(outh);
    int w = voc_size(outw);
    fprintf(stderr, "%d %d\n", h, w);

    IplImage *sized = cvCreateImage(cvSize(w,h), src->depth, src->nChannels);
    cvResize(src, sized, CV_INTER_LINEAR);
    image im = ipl_to_image(sized);
    //normalize_array(im.data, im.h*im.w*im.c);
    translate_image(im, -144);
    resize_network(net, im.h, im.w, im.c);
    forward_network(net, im.data, 0);
    image out = get_network_image(net);
    free_image(im);
    cvReleaseImage(&sized);
    return copy_image(out);
}

void features_VOC_image_size(char *image_path, int h, int w)
{
    int j;
    network net = parse_network_cfg("cfg/voc_imagenet.cfg");
    fprintf(stderr, "%s\n", image_path);

    IplImage* src = 0;
    if( (src = cvLoadImage(image_path,-1)) == 0 ) file_error(image_path);
    image out = features_output_size(net, src, h, w);
    for(j = 0; j < out.c*out.h*out.w; ++j){
        if(j != 0) printf(",");
        printf("%g", out.data[j]);
    }
    printf("\n");
    free_image(out);
    cvReleaseImage(&src);
}
void visualize_imagenet_topk(char *filename)
{
    int i,j,k,l;
    int topk = 10;
    network net = parse_network_cfg("cfg/voc_imagenet.cfg");
    list *plist = get_paths(filename);
    node *n = plist->front;
    int h = voc_size(1), w = voc_size(1);
    int num = get_network_image(net).c;
    image **vizs = calloc(num, sizeof(image*));
    float **score = calloc(num, sizeof(float *));
    for(i = 0; i < num; ++i){
        vizs[i] = calloc(topk, sizeof(image));
        for(j = 0; j < topk; ++j) vizs[i][j] = make_image(h,w,3);
        score[i] = calloc(topk, sizeof(float));
    }

    int count = 0;
    while(n){
        ++count;
        char *image_path = (char *)n->val;
        image im = load_image(image_path, 0, 0);
        n = n->next;
        if(im.h < 200 || im.w < 200) continue;
        printf("Processing %dx%d image\n", im.h, im.w);
        resize_network(net, im.h, im.w, im.c);
        //scale_image(im, 1./255);
        translate_image(im, -144);
        forward_network(net, im.data, 0);
        image out = get_network_image(net);

        int dh = (im.h - h)/(out.h-1);
        int dw = (im.w - w)/(out.w-1);
        //printf("%d %d\n", dh, dw);
        for(k = 0; k < out.c; ++k){
            float topv = 0;
            int topi = -1;
            int topj = -1;
            for(i = 0; i < out.h; ++i){
                for(j = 0; j < out.w; ++j){
                    float val = get_pixel(out, i, j, k);
                    if(val > topv){
                        topv = val;
                        topi = i;
                        topj = j;
                    }
                }
            }
            if(topv){
                image sub = get_sub_image(im, dh*topi, dw*topj, h, w);
                for(l = 0; l < topk; ++l){
                    if(topv > score[k][l]){
                        float swap = score[k][l];
                        score[k][l] = topv;
                        topv = swap;

                        image swapi = vizs[k][l];
                        vizs[k][l] = sub;
                        sub = swapi;
                    }
                }
                free_image(sub);
            }
        }
        free_image(im);
        if(count%50 == 0){
            image grid = grid_images(vizs, num, topk);
            //show_image(grid, "IMAGENET Visualization");
            save_image(grid, "IMAGENET Grid Single Nonorm");
            free_image(grid);
        }
    }
    //cvWaitKey(0);
}

void visualize_imagenet_features(char *filename)
{
    int i,j,k;
    network net = parse_network_cfg("cfg/voc_imagenet.cfg");
    list *plist = get_paths(filename);
    node *n = plist->front;
    int h = voc_size(1), w = voc_size(1);
    int num = get_network_image(net).c;
    image *vizs = calloc(num, sizeof(image));
    for(i = 0; i < num; ++i) vizs[i] = make_image(h, w, 3);
    while(n){
        char *image_path = (char *)n->val;
        image im = load_image(image_path, 0, 0);
        printf("Processing %dx%d image\n", im.h, im.w);
        resize_network(net, im.h, im.w, im.c);
        forward_network(net, im.data, 0);
        image out = get_network_image(net);

        int dh = (im.h - h)/h;
        int dw = (im.w - w)/w;
        for(i = 0; i < out.h; ++i){
            for(j = 0; j < out.w; ++j){
                image sub = get_sub_image(im, dh*i, dw*j, h, w);
                for(k = 0; k < out.c; ++k){
                    float val = get_pixel(out, i, j, k);
                    //printf("%f, ", val);
                    image sub_c = copy_image(sub);
                    scale_image(sub_c, val);
                    add_into_image(sub_c, vizs[k], 0, 0);
                    free_image(sub_c);
                }
                free_image(sub);
            }
        }
        //printf("\n");
        show_images(vizs, 10, "IMAGENET Visualization");
        cvWaitKey(1000);
        n = n->next;
    }
    cvWaitKey(0);
}

void visualize_cat()
{
    network net = parse_network_cfg("cfg/voc_imagenet.cfg");
    image im = load_image("data/cat.png", 0, 0);
    printf("Processing %dx%d image\n", im.h, im.w);
    resize_network(net, im.h, im.w, im.c);
    forward_network(net, im.data, 0);

    visualize_network(net);
    cvWaitKey(0);
}

void features_VOC_image(char *image_file, char *image_dir, char *out_dir, int flip, int interval)
{
    int i,j;
    network net = parse_network_cfg("cfg/voc_imagenet.cfg");
    char image_path[1024];
    sprintf(image_path, "%s/%s",image_dir, image_file);
    char out_path[1024];
    if (flip)sprintf(out_path, "%s%d/%s_r.txt",out_dir, interval, image_file);
    else sprintf(out_path, "%s%d/%s.txt",out_dir, interval, image_file);
    printf("%s\n", image_file);

    IplImage* src = 0;
    if( (src = cvLoadImage(image_path,-1)) == 0 ) file_error(image_path);
    if(flip)cvFlip(src, 0, 1);
    int w = src->width;
    int h = src->height;
    int sbin = 8;
    double scale = pow(2., 1./interval);
    int m = (w<h)?w:h;
    int max_scale = 1+floor((double)log((double)m/(5.*sbin))/log(scale));
    if(max_scale < interval) error("max_scale must be >= interval");
    image *ims = calloc(max_scale+interval, sizeof(image));

    for(i = 0; i < interval; ++i){
        double factor = 1./pow(scale, i);
        double ih =  round(h*factor);
        double iw =  round(w*factor);
        int ex_h = round(ih/4.) - 2;
        int ex_w = round(iw/4.) - 2;
        ims[i] = features_output_size(net, src, ex_h, ex_w);

        ih =  round(h*factor);
        iw =  round(w*factor);
        ex_h = round(ih/8.) - 2;
        ex_w = round(iw/8.) - 2;
        ims[i+interval] = features_output_size(net, src, ex_h, ex_w);
        for(j = i+interval; j < max_scale; j += interval){
            factor /= 2.;
            ih =  round(h*factor);
            iw =  round(w*factor);
            ex_h = round(ih/8.) - 2;
            ex_w = round(iw/8.) - 2;
            ims[j+interval] = features_output_size(net, src, ex_h, ex_w);
        }
    }
    FILE *fp = fopen(out_path, "w");
    if(fp == 0) file_error(out_path);
    for(i = 0; i < max_scale+interval; ++i){
        image out = ims[i];
        fprintf(fp, "%d, %d, %d\n",out.c, out.h, out.w);
        for(j = 0; j < out.c*out.h*out.w; ++j){
            if(j != 0)fprintf(fp, ",");
            float o = out.data[j];
            if(o < 0) o = 0;
            fprintf(fp, "%g", o);
        }
        fprintf(fp, "\n");
        free_image(out);
    }
    free(ims);
    fclose(fp);
    cvReleaseImage(&src);
}

void test_distribution()
{
    IplImage* img = 0;
    if( (img = cvLoadImage("im_small.jpg",-1)) == 0 ) file_error("im_small.jpg");
    network net = parse_network_cfg("cfg/voc_features.cfg");
    int h = img->height/8-2;
    int w = img->width/8-2;
    image out = features_output_size(net, img, h, w);
    int c = out.c;
    out.c = 1;
    show_image(out, "output");
    out.c = c;
    image input = ipl_to_image(img);
    show_image(input, "input");
    CvScalar s;
    int i,j;
    image affects = make_image(input.h, input.w, 1);
    int count = 0;
    for(i = 0; i<img->height; i += 1){
        for(j = 0; j < img->width; j += 1){
            IplImage *copy = cvCloneImage(img);
            s=cvGet2D(copy,i,j); // get the (i,j) pixel value
            printf("%d/%d\n", count++, img->height*img->width);
            s.val[0]=0;
            s.val[1]=0;
            s.val[2]=0;
            cvSet2D(copy,i,j,s); // set the (i,j) pixel value
            image mod = features_output_size(net, copy, h, w);
            image dist = image_distance(out, mod);
            show_image(affects, "affects");
            cvWaitKey(1);
            cvReleaseImage(&copy);
            //affects.data[i*affects.w + j] += dist.data[3*dist.w+5];
            affects.data[i*affects.w + j] += dist.data[1*dist.w+1];
            free_image(mod);
            free_image(dist);
        }
    }
    show_image(affects, "Origins");
    cvWaitKey(0);
    cvWaitKey(0);
}


int main(int argc, char *argv[])
{
    //train_full();
    //test_distribution();
    //feenableexcept(FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW);

    //test_blas();
    //test_visualize();
    //test_gpu_blas();
    //test_blas();
    //test_convolve_matrix();
    //    test_im2row();
    //test_split();
    //test_ensemble();
    //test_nist_single();
    //test_nist();
    train_nist();
    //test_convolutional_layer();
    //test_cifar10();
    //train_cifar10();
    //test_vince();
    //test_full();
    //tune_VOC();
    //features_VOC_image(argv[1], argv[2], argv[3], 0);
    //features_VOC_image(argv[1], argv[2], argv[3], 1);
    //train_VOC();
    //features_VOC_image(argv[1], argv[2], argv[3], 0, 4);
    //features_VOC_image(argv[1], argv[2], argv[3], 1, 4);
    //features_VOC_image_size(argv[1], atoi(argv[2]), atoi(argv[3]));
    //visualize_imagenet_features("data/assira/train.list");
    //visualize_imagenet_topk("data/VOC2012.list");
    //visualize_cat();
    //flip_network();
    //test_visualize();
    //test_parser();
    fprintf(stderr, "Success!\n");
    //test_random_preprocess();
    //test_random_classify();
    //test_parser();
    //test_backpropagate();
    //test_ann();
    //test_convolve();
    //test_upsample();
    //test_rotate();
    //test_load();
    //test_network();
    //test_convolutional_layer();
    //verify_convolutional_layer();
    //test_color();
    //cvWaitKey(0);
    return 0;
}