#include <stdio.h>
|
#include <math.h>
|
void col2im_add_pixel(float *im, int height, int width, int channels,
|
int row, int col, int channel, int pad, float val)
|
{
|
row -= pad;
|
col -= pad;
|
|
if (row < 0 || col < 0 ||
|
row >= height || col >= width) return;
|
im[col + width*(row + height*channel)] += val;
|
}
|
//This one might be too, can't remember.
|
void col2im_cpu(float* data_col,
|
int channels, int height, int width,
|
int ksize, int stride, int pad, float* data_im)
|
{
|
int c,h,w;
|
int height_col = (height - ksize) / stride + 1;
|
int width_col = (width - ksize) / stride + 1;
|
if (pad){
|
height_col = 1 + (height-1) / stride;
|
width_col = 1 + (width-1) / stride;
|
pad = ksize/2;
|
}
|
int channels_col = channels * ksize * ksize;
|
for (c = 0; c < channels_col; ++c) {
|
int w_offset = c % ksize;
|
int h_offset = (c / ksize) % ksize;
|
int c_im = c / ksize / ksize;
|
for (h = 0; h < height_col; ++h) {
|
for (w = 0; w < width_col; ++w) {
|
int im_row = h_offset + h * stride;
|
int im_col = w_offset + w * stride;
|
int col_index = (c * height_col + h) * width_col + w;
|
double val = data_col[col_index];
|
col2im_add_pixel(data_im, height, width, channels,
|
im_row, im_col, c_im, pad, val);
|
}
|
}
|
}
|
}
|
