diff --git a/frameworks/innerkitsimpl/converter/src/post_proc_slr.cpp b/frameworks/innerkitsimpl/converter/src/post_proc_slr.cpp
index f90d93f2b664332a050166d0a598a991080c9c62..f791fefdb789798a1f42ad279c197380bbfae522 100644
--- a/frameworks/innerkitsimpl/converter/src/post_proc_slr.cpp
+++ b/frameworks/innerkitsimpl/converter/src/post_proc_slr.cpp
@@ -99,7 +99,7 @@ bool SLRCheck(const SLRMat &src, const SLRMat &dst, const SLRWeightMat &x, const
 inline uint32_t SLRCast(float v)
 {
     v = std::clamp(v, 0.0f, 255.0f); // 255.0f rgba max value
-    uint32_t uv = static_cast<uint32_t>(v);
+    uint32_t uv = static_cast<uint32_t>(v + 0.5f); // 0.5 : round
     return uv;
 }