From 70d622ea54c55aa5489e71b769a92447a586c879 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Mon, 14 Jul 2014 05:07:51 +0000
Subject: [PATCH] Added batch to col2im, padding option
---
src/col2im.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 47 insertions(+), 0 deletions(-)
diff --git a/src/col2im.c b/src/col2im.c
index e69de29..0520567 100644
--- a/src/col2im.c
+++ b/src/col2im.c
@@ -0,0 +1,47 @@
+inline void col2im_set_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 + channel*height)] = val;
+}
+//This one might be too, can't remember.
+void col2im_cpu(float* data_col,
+ const int batch, const int channels, const int height, const int width,
+ const int ksize, const int stride, int pad, float* data_im)
+{
+ int c,h,w,b;
+ 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;
+ int im_size = height*width*channels;
+ int col_size = height_col*width_col*channels_col;
+ for (b = 0; b < batch; ++b) {
+ 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;
+ double val = data_col[(c * height_col + h) * width_col + w];
+ col2im_set_pixel(data_im, height, width, channels,
+ im_row, im_col, c_im, pad, val);
+ }
+ }
+ }
+ data_im += im_size;
+ data_col+= col_size;
+ }
+}
+
+
--
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