| | |
| | | return float_to_image(w,h,c,l.delta); |
| | | } |
| | | |
| | | convolutional_layer make_convolutional_layer(int batch, int h, int w, int c, int n, int size, int stride, int pad, ACTIVATION activation) |
| | | convolutional_layer make_convolutional_layer(int batch, int h, int w, int c, int n, int size, int stride, int pad, ACTIVATION activation, int batch_normalize) |
| | | { |
| | | int i; |
| | | convolutional_layer l = {0}; |
| | |
| | | l.stride = stride; |
| | | l.size = size; |
| | | l.pad = pad; |
| | | l.batch_normalize = batch_normalize; |
| | | |
| | | l.filters = calloc(c*n*size*size, sizeof(float)); |
| | | l.filter_updates = calloc(c*n*size*size, sizeof(float)); |
| | | |
| | | l.biases = calloc(n, sizeof(float)); |
| | | l.bias_updates = calloc(n, sizeof(float)); |
| | | float scale = 1./sqrt(size*size*c); |
| | | |
| | | // float scale = 1./sqrt(size*size*c); |
| | | float scale = sqrt(2./(size*size*c)); |
| | | for(i = 0; i < c*n*size*size; ++i) l.filters[i] = 2*scale*rand_uniform() - scale; |
| | | for(i = 0; i < n; ++i){ |
| | | l.biases[i] = scale; |
| | | } |
| | | int out_h = convolutional_out_height(l); |
| | | int out_w = convolutional_out_width(l); |
| | | l.out_h = out_h; |
| | |
| | | l.output = calloc(l.batch*out_h * out_w * n, sizeof(float)); |
| | | l.delta = calloc(l.batch*out_h * out_w * n, sizeof(float)); |
| | | |
| | | #ifdef GPU |
| | | if(batch_normalize){ |
| | | l.scales = calloc(n, sizeof(float)); |
| | | l.scale_updates = calloc(n, sizeof(float)); |
| | | for(i = 0; i < n; ++i){ |
| | | l.scales[i] = 1; |
| | | } |
| | | |
| | | l.mean = calloc(n, sizeof(float)); |
| | | l.variance = calloc(n, sizeof(float)); |
| | | |
| | | l.rolling_mean = calloc(n, sizeof(float)); |
| | | l.rolling_variance = calloc(n, sizeof(float)); |
| | | } |
| | | |
| | | #ifdef GPU |
| | | l.filters_gpu = cuda_make_array(l.filters, c*n*size*size); |
| | | l.filter_updates_gpu = cuda_make_array(l.filter_updates, c*n*size*size); |
| | | |
| | | l.biases_gpu = cuda_make_array(l.biases, n); |
| | | l.bias_updates_gpu = cuda_make_array(l.bias_updates, n); |
| | | |
| | | l.scales_gpu = cuda_make_array(l.scales, n); |
| | | l.scale_updates_gpu = cuda_make_array(l.scale_updates, n); |
| | | |
| | | l.col_image_gpu = cuda_make_array(l.col_image, out_h*out_w*size*size*c); |
| | | l.delta_gpu = cuda_make_array(l.delta, l.batch*out_h*out_w*n); |
| | | l.output_gpu = cuda_make_array(l.output, l.batch*out_h*out_w*n); |
| | | #endif |
| | | |
| | | if(batch_normalize){ |
| | | l.mean_gpu = cuda_make_array(l.mean, n); |
| | | l.variance_gpu = cuda_make_array(l.variance, n); |
| | | |
| | | l.rolling_mean_gpu = cuda_make_array(l.mean, n); |
| | | l.rolling_variance_gpu = cuda_make_array(l.variance, n); |
| | | |
| | | l.mean_delta_gpu = cuda_make_array(l.mean, n); |
| | | l.variance_delta_gpu = cuda_make_array(l.variance, n); |
| | | |
| | | l.x_gpu = cuda_make_array(l.output, l.batch*out_h*out_w*n); |
| | | l.x_norm_gpu = cuda_make_array(l.output, l.batch*out_h*out_w*n); |
| | | } |
| | | #endif |
| | | l.activation = activation; |
| | | |
| | | fprintf(stderr, "Convolutional Layer: %d x %d x %d image, %d filters -> %d x %d x %d image\n", h,w,c,n, out_h, out_w, n); |
| | |
| | | return l; |
| | | } |
| | | |
| | | void resize_convolutional_layer(convolutional_layer *l, int h, int w) |
| | | void denormalize_convolutional_layer(convolutional_layer l) |
| | | { |
| | | l->h = h; |
| | | int i, j; |
| | | for(i = 0; i < l.n; ++i){ |
| | | float scale = l.scales[i]/sqrt(l.rolling_variance[i] + .00001); |
| | | for(j = 0; j < l.c*l.size*l.size; ++j){ |
| | | l.filters[i*l.c*l.size*l.size + j] *= scale; |
| | | } |
| | | l.biases[i] -= l.rolling_mean[i] * scale; |
| | | } |
| | | } |
| | | |
| | | void test_convolutional_layer() |
| | | { |
| | | convolutional_layer l = make_convolutional_layer(1, 5, 5, 3, 2, 5, 2, 1, LEAKY, 1); |
| | | l.batch_normalize = 1; |
| | | float data[] = {1,1,1,1,1, |
| | | 1,1,1,1,1, |
| | | 1,1,1,1,1, |
| | | 1,1,1,1,1, |
| | | 1,1,1,1,1, |
| | | 2,2,2,2,2, |
| | | 2,2,2,2,2, |
| | | 2,2,2,2,2, |
| | | 2,2,2,2,2, |
| | | 2,2,2,2,2, |
| | | 3,3,3,3,3, |
| | | 3,3,3,3,3, |
| | | 3,3,3,3,3, |
| | | 3,3,3,3,3, |
| | | 3,3,3,3,3}; |
| | | network_state state = {0}; |
| | | state.input = data; |
| | | forward_convolutional_layer(l, state); |
| | | } |
| | | |
| | | void resize_convolutional_layer(convolutional_layer *l, int w, int h) |
| | | { |
| | | l->w = w; |
| | | int out_h = convolutional_out_height(*l); |
| | | l->h = h; |
| | | int out_w = convolutional_out_width(*l); |
| | | int out_h = convolutional_out_height(*l); |
| | | |
| | | l->out_w = out_w; |
| | | l->out_h = out_h; |
| | | |
| | | l->outputs = l->out_h * l->out_w * l->out_c; |
| | | l->inputs = l->w * l->h * l->c; |
| | | |
| | | l->col_image = realloc(l->col_image, |
| | | out_h*out_w*l->size*l->size*l->c*sizeof(float)); |
| | | out_h*out_w*l->size*l->size*l->c*sizeof(float)); |
| | | l->output = realloc(l->output, |
| | | l->batch*out_h * out_w * l->n*sizeof(float)); |
| | | l->batch*out_h * out_w * l->n*sizeof(float)); |
| | | l->delta = realloc(l->delta, |
| | | l->batch*out_h * out_w * l->n*sizeof(float)); |
| | | l->batch*out_h * out_w * l->n*sizeof(float)); |
| | | |
| | | #ifdef GPU |
| | | #ifdef GPU |
| | | cuda_free(l->col_image_gpu); |
| | | cuda_free(l->delta_gpu); |
| | | cuda_free(l->output_gpu); |
| | | |
| | | l->col_image_gpu = cuda_make_array(l->col_image, out_h*out_w*l->size*l->size*l->c); |
| | | l->delta_gpu = cuda_make_array(l->delta, l->batch*out_h*out_w*l->n); |
| | | l->output_gpu = cuda_make_array(l->output, l->batch*out_h*out_w*l->n); |
| | | #endif |
| | | l->delta_gpu = cuda_make_array(l->delta, l->batch*out_h*out_w*l->n); |
| | | l->output_gpu = cuda_make_array(l->output, l->batch*out_h*out_w*l->n); |
| | | #endif |
| | | } |
| | | |
| | | void bias_output(float *output, float *biases, int batch, int n, int size) |
| | | void add_bias(float *output, float *biases, int batch, int n, int size) |
| | | { |
| | | int i,j,b; |
| | | for(b = 0; b < batch; ++b){ |
| | | for(i = 0; i < n; ++i){ |
| | | for(j = 0; j < size; ++j){ |
| | | output[(b*n + i)*size + j] = biases[i]; |
| | | output[(b*n + i)*size + j] += biases[i]; |
| | | } |
| | | } |
| | | } |
| | | } |
| | | |
| | | void scale_bias(float *output, float *scales, int batch, int n, int size) |
| | | { |
| | | int i,j,b; |
| | | for(b = 0; b < batch; ++b){ |
| | | for(i = 0; i < n; ++i){ |
| | | for(j = 0; j < size; ++j){ |
| | | output[(b*n + i)*size + j] *= scales[i]; |
| | | } |
| | | } |
| | | } |
| | |
| | | } |
| | | } |
| | | |
| | | |
| | | void forward_convolutional_layer(const convolutional_layer l, network_state state) |
| | | { |
| | | int out_h = convolutional_out_height(l); |
| | | int out_w = convolutional_out_width(l); |
| | | int i; |
| | | |
| | | bias_output(l.output, l.biases, l.batch, l.n, out_h*out_w); |
| | | fill_cpu(l.outputs*l.batch, 0, l.output, 1); |
| | | |
| | | int m = l.n; |
| | | int k = l.size*l.size*l.c; |
| | |
| | | |
| | | for(i = 0; i < l.batch; ++i){ |
| | | im2col_cpu(state.input, l.c, l.h, l.w, |
| | | l.size, l.stride, l.pad, b); |
| | | l.size, l.stride, l.pad, b); |
| | | gemm(0,0,m,n,k,1,a,k,b,n,1,c,n); |
| | | c += n*m; |
| | | state.input += l.c*l.h*l.w; |
| | | } |
| | | |
| | | if(l.batch_normalize){ |
| | | if(state.train){ |
| | | mean_cpu(l.output, l.batch, l.n, l.out_h*l.out_w, l.mean); |
| | | variance_cpu(l.output, l.mean, l.batch, l.n, l.out_h*l.out_w, l.variance); |
| | | normalize_cpu(l.output, l.mean, l.variance, l.batch, l.n, l.out_h*l.out_w); |
| | | } else { |
| | | normalize_cpu(l.output, l.rolling_mean, l.rolling_variance, l.batch, l.n, l.out_h*l.out_w); |
| | | } |
| | | scale_bias(l.output, l.scales, l.batch, l.n, out_h*out_w); |
| | | } |
| | | add_bias(l.output, l.biases, l.batch, l.n, out_h*out_w); |
| | | |
| | | activate_array(l.output, m*n*l.batch, l.activation); |
| | | } |
| | | |
| | |
| | | gradient_array(l.output, m*k*l.batch, l.activation, l.delta); |
| | | backward_bias(l.bias_updates, l.delta, l.batch, l.n, k); |
| | | |
| | | if(state.delta) memset(state.delta, 0, l.batch*l.h*l.w*l.c*sizeof(float)); |
| | | |
| | | for(i = 0; i < l.batch; ++i){ |
| | | float *a = l.delta + i*m*k; |
| | | float *b = l.col_image; |
| | |
| | | return float_to_image(w,h,c,l.filters+i*h*w*c); |
| | | } |
| | | |
| | | void rgbgr_filters(convolutional_layer l) |
| | | { |
| | | int i; |
| | | for(i = 0; i < l.n; ++i){ |
| | | image im = get_convolutional_filter(l, i); |
| | | if (im.c == 3) { |
| | | rgbgr_image(im); |
| | | } |
| | | } |
| | | } |
| | | |
| | | void rescale_filters(convolutional_layer l, float scale, float trans) |
| | | { |
| | | int i; |
| | | for(i = 0; i < l.n; ++i){ |
| | | image im = get_convolutional_filter(l, i); |
| | | if (im.c == 3) { |
| | | scale_image(im, scale); |
| | | float sum = sum_array(im.data, im.w*im.h*im.c); |
| | | l.biases[i] += sum*trans; |
| | | } |
| | | } |
| | | } |
| | | |
| | | image *get_filters(convolutional_layer l) |
| | | { |
| | | image *filters = calloc(l.n, sizeof(image)); |
| | | int i; |
| | | for(i = 0; i < l.n; ++i){ |
| | | filters[i] = copy_image(get_convolutional_filter(l, i)); |
| | | //normalize_image(filters[i]); |
| | | } |
| | | return filters; |
| | | } |