diff --git a/imgproc/imgprc_mgr.cpp b/imgproc/imgprc_mgr.cpp
index 604c803..d4cf8e6 100644
--- a/imgproc/imgprc_mgr.cpp
+++ b/imgproc/imgprc_mgr.cpp
@@ -183,7 +183,11 @@ void imgproc_mgr::empty_dump_image(DUMP_PROTO)
 
 void imgproc_mgr::start_workers(int cnt)
 {
+	run_ = false;
+	for(int i = 0; i < working_cnt_; ++i)
+		raw_.trigger();
 	workers_.stop(nullptr);
+	run_ = true;
 
 #ifdef USE_THREAD_PAGED_DATA
 	for(auto& v: params_)