Enable person detection example.

The corresponding change in upstream TF is: tensorflow/tensorflow#48809

Bug: http://b/184884735

ci/sync_from_upstream_tf.sh

@@ -66,13 +66,6 @@ rsync -r --delete /tmp/tensorflow/tensorflow/lite/micro tensorflow/lite/
 # dependencies.
 rm -rf tensorflow/lite/micro/examples/micro_speech
 
-# TODO(b/184884735): enable the person_detection example. We need some of the
-# sources from the person_detection example for the benchmarks and so are
-# currently only removing the Makefile and the BUILD files.
-rm -rf tensorflow/lite/micro/examples/person_detection/Makefile
-rm -rf tensorflow/lite/micro/examples/person_detection/BUILD
-rm -rf tensorflow/lite/micro/examples/person_detection/utils/BUILD
-
 rm -rf tensorflow/lite/micro/tools/ci_build/tflm_bazel
 
 # Any TFLM-repo specific files that are not in upstream TF will be deleted with

tensorflow/lite/micro/examples/person_detection/BUILD

@@ -0,0 +1,144 @@
+# Description:
+#   TensorFlow Lite for Microcontrollers Vision Example.
+package(
+    default_visibility = ["//visibility:public"],
+    features = ["-layering_check"],
+    licenses = ["notice"],
+)
+
+cc_library(
+    name = "model_settings",
+    srcs = [
+        "model_settings.cc",
+    ],
+    hdrs = [
+        "model_settings.h",
+    ],
+)
+
+cc_library(
+    name = "person_detect_model_data",
+    srcs = [
+        "@person_detect_data//:person_detect_model_data",
+    ],
+    hdrs = [
+        "person_detect_model_data.h",
+    ],
+    tags = [
+        "no_oss",  # TODO(b/174680668): Exclude from OSS.
+    ],
+)
+
+cc_library(
+    name = "simple_images_test_data",
+    srcs = [
+        "no_person_image_data.cc",
+        "person_image_data.cc",
+    ],
+    hdrs = [
+        "no_person_image_data.h",
+        "person_image_data.h",
+    ],
+    tags = [
+        "no_oss",  # TODO(b/174680668): Exclude from OSS.
+    ],
+    deps = [
+        ":model_settings",
+    ],
+)
+
+cc_test(
+    name = "person_detection_test",
+    srcs = ["person_detection_test.cc"],
+    tags = [
+        "no_oss",  # TODO(b/174680668): Exclude from OSS.
+    ],
+    deps = [
+        ":model_settings",
+        ":person_detect_model_data",
+        ":simple_images_test_data",
+        "//tensorflow/lite/c:common",
+        "//tensorflow/lite/micro:micro_error_reporter",
+        "//tensorflow/lite/micro:micro_framework",
+        "//tensorflow/lite/micro:op_resolvers",
+        "//tensorflow/lite/micro/testing:micro_test",
+        "//tensorflow/lite/schema:schema_fbs",
+    ],
+)
+
+cc_library(
+    name = "image_provider",
+    srcs = [
+        "image_provider.cc",
+    ],
+    hdrs = [
+        "image_provider.h",
+    ],
+    deps = [
+        ":model_settings",
+        "//tensorflow/lite/c:common",
+        "//tensorflow/lite/micro:micro_error_reporter",
+    ],
+)
+
+cc_test(
+    name = "image_provider_test",
+    srcs = [
+        "image_provider_test.cc",
+    ],
+    deps = [
+        ":image_provider",
+        ":model_settings",
+        "//tensorflow/lite/c:common",
+        "//tensorflow/lite/micro:micro_error_reporter",
+        "//tensorflow/lite/micro/testing:micro_test",
+    ],
+)
+
+cc_library(
+    name = "detection_responder",
+    srcs = [
+        "detection_responder.cc",
+    ],
+    hdrs = [
+        "detection_responder.h",
+    ],
+    deps = [
+        "//tensorflow/lite/c:common",
+        "//tensorflow/lite/micro:micro_error_reporter",
+    ],
+)
+
+cc_test(
+    name = "detection_responder_test",
+    srcs = [
+        "detection_responder_test.cc",
+    ],
+    deps = [
+        ":detection_responder",
+        "//tensorflow/lite/micro/testing:micro_test",
+    ],
+)
+
+cc_binary(
+    name = "person_detection",
+    srcs = [
+        "main.cc",
+        "main_functions.cc",
+        "main_functions.h",
+    ],
+    tags = [
+        "no_oss",  # TODO(b/174680668): Exclude from OSS.
+    ],
+    deps = [
+        ":detection_responder",
+        ":image_provider",
+        ":model_settings",
+        ":person_detect_model_data",
+        "//tensorflow/lite/micro:micro_error_reporter",
+        "//tensorflow/lite/micro:micro_framework",
+        "//tensorflow/lite/micro:op_resolvers",
+        "//tensorflow/lite/micro:system_setup",
+        "//tensorflow/lite/schema:schema_fbs",
+    ],
+)

tensorflow/lite/micro/examples/person_detection/utils/BUILD

@@ -0,0 +1,46 @@
+# Description:
+#   TensorFlow Lite for Microcontrollers Vision Example Utils.
+package(
+    features = ["-layering_check"],
+    licenses = ["notice"],
+)
+
+py_binary(
+    name = "raw_to_bitmap",
+    srcs = ["raw_to_bitmap.py"],
+    python_version = "PY3",
+    srcs_version = "PY3ONLY",
+    tags = [
+        "no_oss",  # TODO(b/186670822): enable once tflite-micro supports bazel+Python
+    ],
+    deps = ["//third_party/py/numpy"],
+)
+
+py_library(
+    name = "raw_to_bitmap_lib",
+    srcs = ["raw_to_bitmap.py"],
+    srcs_version = "PY3",
+    tags = [
+        "no_oss",  # TODO(b/186670822): enable once tflite-micro supports bazel+Python
+    ],
+    deps = [
+        "//third_party/py/numpy",
+    ],
+)
+
+py_test(
+    name = "raw_to_bitmap_test",
+    srcs = ["raw_to_bitmap_test.py"],
+    data = glob(["testdata/**"]),
+    python_version = "PY3",
+    tags = [
+        "no_oss",  # TODO(b/174680668): Exclude Python tests from OSS.
+        "nomicro_static",  # TF dep incompatible w/ TF_LITE_STATIC_MEMORY.
+        "noubsan",  # TODO(b/144512025): Fix raw_to_bitmap_test to fix ubsan failure.
+    ],
+    deps = [
+        ":raw_to_bitmap_lib",
+        "//tensorflow/python:platform_test",
+        "//third_party/py/numpy",
+    ],
+)