Add kLog camera command.

Change-Id: Ica73c88ca38b1fc5dc505ce61553d16772270644
diff --git a/y2019/vision/BUILD b/y2019/vision/BUILD
index bf71116..b87e2ce 100644
--- a/y2019/vision/BUILD
+++ b/y2019/vision/BUILD
@@ -34,6 +34,16 @@
     tools = [":constants_formatting"],
 )
 
+cc_library(
+    name = "image_writer",
+    srcs = ["image_writer.cc"],
+    hdrs = ["image_writer.h"],
+    deps = [
+        "//aos/logging",
+        "//aos/vision/image:image_types",
+    ],
+)
+
 sh_test(
     name = "constants_formatting_test",
     srcs = ["constants_formatting_test.sh"],
@@ -92,6 +102,7 @@
     srcs = ["target_sender.cc"],
     restricted_to = VISION_TARGETS,
     deps = [
+        ":image_writer",
         ":target_finder",
         "//aos/vision/blob:codec",
         "//aos/vision/blob:find_blob",