diff --git a/.gitignore b/.gitignore
index 84c048a..92bbbcc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 /build/
+/exp/
diff --git a/conv/fidx_stego.cc b/conv/fidx_stego.cc
index 9950b16..0218f68 100644
--- a/conv/fidx_stego.cc
+++ b/conv/fidx_stego.cc
@@ -56,7 +56,7 @@ std::vector<std::vector<int32_t>> indices;
 
 static void Embed(int32_t t, Frame& dst, const Frame& base) {
   const auto bw  = args::get(param::bw);
-  const auto bh  = args::get(param::bw);
+  const auto bh  = args::get(param::bh);
   const auto hbw = bw/2;
   const auto hbh = bh/2;
 
@@ -92,7 +92,7 @@ static void Embed(int32_t t, Frame& dst, const Frame& base) {
 
 static void Exec() {
   const auto bw = args::get(param::bw);
-  const auto bh = args::get(param::bw);
+  const auto bh = args::get(param::bh);
   const auto ut = args::get(param::utime);
   Enforce(bw > 0 && bh > 0, "block size must be greater than 0");
   Enforce(ut > 0, "utime must be greater than 0");
diff --git a/conv/stego_fprob.cc b/conv/stego_fprob.cc
index 4b5c7dc..ef81a8a 100644
--- a/conv/stego_fprob.cc
+++ b/conv/stego_fprob.cc
@@ -131,7 +131,7 @@ static Vec EachBlock(const Frame& cf, const Frame& pf, int32_t bx, int32_t by) {
 
 static void EachFrame(int32_t t, const Frame& cf, const Frame& pf) {
   const auto bw = args::get(param::bw);
-  const auto bh = args::get(param::bw);
+  const auto bh = args::get(param::bh);
   const auto ut = args::get(param::utime);
 
   Enforce(cf.w == pf.w && cf.h == pf.h, "variable frame size is not allowed");
@@ -185,7 +185,7 @@ static void EachFrame(int32_t t, const Frame& cf, const Frame& pf) {
 
 static void Exec() {
   const auto bw = args::get(param::bw);
-  const auto bh = args::get(param::bw);
+  const auto bh = args::get(param::bh);
   const auto ut = args::get(param::utime);
   Enforce(bw > 0 && bh > 0, "block size must be greater than 0");
   Enforce(ut > 0, "utime must be greater than 0");