Merge pull request #3973 from priankakariatyml:ios-task-classifier-result

PiperOrigin-RevId: 501005242

mediapipe/tasks/ios/components/containers/BUILD

@@ -1,4 +1,4 @@
-# Copyright 2022 The MediaPipe Authors. All Rights Reserved.
+# Copyright 2023 The MediaPipe Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -17,12 +17,18 @@ package(default_visibility = ["//mediapipe/tasks:internal"])
 licenses(["notice"])
 
 objc_library(
-    name = "MPPClassifierOptionsHelpers",
+    name = "MPPCategory",
-    srcs = ["sources/MPPClassifierOptions+Helpers.mm"],
+    srcs = ["sources/MPPCategory.m"],
-    hdrs = ["sources/MPPClassifierOptions+Helpers.h"],
+    hdrs = ["sources/MPPCategory.h"],
+    deps = ["//third_party/apple_frameworks:Foundation"],
+)
+
+objc_library(
+    name = "MPPClassificationResult",
+    srcs = ["sources/MPPClassificationResult.m"],
+    hdrs = ["sources/MPPClassificationResult.h"],
     deps = [
-        "//mediapipe/tasks/cc/components/processors/proto:classifier_options_cc_proto",
+        ":MPPCategory",
-        "//mediapipe/tasks/ios/common/utils:NSStringHelpers",
+        "//third_party/apple_frameworks:Foundation",
-        "//mediapipe/tasks/ios/components/processors:MPPClassifierOptions",
     ],
 )

mediapipe/tasks/ios/components/containers/sources/MPPCategory.h

@@ -0,0 +1,68 @@
+// Copyright 2023 The MediaPipe Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * Category is a util class that contains a label, its display name, a float value as score, and the
+ * index of the label in the corresponding label file. Typically it's used as the result of
+ * classification tasks.
+ */
+NS_SWIFT_NAME(ClassificationCategory)
+@interface MPPCategory : NSObject
+
+/**
+ * The index of the label in the corresponding label file. Set to -1 if the index is
+ * not set.
+ */
+@property(nonatomic, readonly) NSInteger index;
+
+/** Confidence score for this class. */
+@property(nonatomic, readonly) float score;
+
+/** The label of this category object. */
+@property(nonatomic, readonly, nullable) NSString *categoryName;
+
+/**
+ * The display name of the label, which may be translated for different locales. For example, a
+ * label, "apple", may be translated into Spanish for display purpose, so that the display name is
+ * "manzana".
+ */
+@property(nonatomic, readonly, nullable) NSString *displayName;
+
+/**
+ * Initializes a new `MPPCategory` with the given index, score, category name and display name.
+ *
+ * @param index The index of the label in the corresponding label file.
+ * @param score The probability score of this label category.
+ * @param categoryName The label of this category object.
+ * @param displayName The display name of the label.
+ *
+ * @return An instance of `MPPCategory` initialized with the given index, score, category name and
+ * display name.
+ */
+- (instancetype)initWithIndex:(NSInteger)index
+                        score:(float)score
+                 categoryName:(nullable NSString *)categoryName
+                  displayName:(nullable NSString *)displayName NS_DESIGNATED_INITIALIZER;
+
+- (instancetype)init NS_UNAVAILABLE;
+
++ (instancetype)new NS_UNAVAILABLE;
+
+@end
+
+NS_ASSUME_NONNULL_END

mediapipe/tasks/ios/components/containers/sources/MPPCategory.m

@@ -0,0 +1,33 @@
+// Copyright 2023 The MediaPipe Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "mediapipe/tasks/ios/components/containers/sources/MPPCategory.h"
+
+@implementation MPPCategory
+
+- (instancetype)initWithIndex:(NSInteger)index
+                        score:(float)score
+                 categoryName:(nullable NSString *)categoryName
+                  displayName:(nullable NSString *)displayName {
+  self = [super init];
+  if (self) {
+    _index = index;
+    _score = score;
+    _categoryName = categoryName;
+    _displayName = displayName;
+  }
+  return self;
+}
+
+@end

mediapipe/tasks/ios/components/containers/sources/MPPClassificationResult.h

@@ -0,0 +1,116 @@
+// Copyright 2023 The MediaPipe Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import <Foundation/Foundation.h>
+#import "mediapipe/tasks/ios/components/containers/sources/MPPCategory.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * Represents the list of classification for a given classifier head. Typically used as a result
+ * for classification tasks.
+ */
+NS_SWIFT_NAME(Classifications)
+@interface MPPClassifications : NSObject
+
+/**
+ * The index of the classifier head these entries refer to. This is useful for multi-head models.
+ */
+@property(nonatomic, readonly) NSInteger headIndex;
+
+/** The optional name of the classifier head, which is the corresponding tensor metadata name. */
+@property(nonatomic, readonly, nullable) NSString *headName;
+
+/** An array of `MPPCategory` objects containing the predicted categories. */
+@property(nonatomic, readonly) NSArray<MPPCategory *> *categories;
+
+/**
+ * Initializes a new `MPPClassifications` object with the given head index and array of categories.
+ * Head name is initialized to `nil`.
+ *
+ * @param headIndex The index of the classifier head.
+ * @param categories  An array of `MPPCategory` objects containing the predicted categories.
+ *
+ * @return An instance of `MPPClassifications` initialized with the given head index and
+ * array of categories.
+ */
+- (instancetype)initWithHeadIndex:(NSInteger)headIndex
+                       categories:(NSArray<MPPCategory *> *)categories;
+
+/**
+ * Initializes a new `MPPClassifications` with the given head index, head name and array of
+ * categories.
+ *
+ * @param headIndex The index of the classifier head.
+ * @param headName The name of the classifier head, which is the corresponding tensor metadata
+ * name.
+ * @param categories An array of `MPPCategory` objects containing the predicted categories.
+ *
+ * @return An object of `MPPClassifications` initialized with the given head index, head name and
+ * array of categories.
+ */
+- (instancetype)initWithHeadIndex:(NSInteger)headIndex
+                         headName:(nullable NSString *)headName
+                       categories:(NSArray<MPPCategory *> *)categories NS_DESIGNATED_INITIALIZER;
+
+- (instancetype)init NS_UNAVAILABLE;
+
++ (instancetype)new NS_UNAVAILABLE;
+
+@end
+
+/**
+ * Represents the classification results of a model. Typically used as a result for classification
+ * tasks.
+ */
+NS_SWIFT_NAME(ClassificationResult)
+@interface MPPClassificationResult : NSObject
+
+/**
+ * An Array of `MPPClassifications` objects containing the predicted categories for each head of
+ * the model.
+ */
+@property(nonatomic, readonly) NSArray<MPPClassifications *> *classifications;
+
+/**
+ * The optional timestamp (in milliseconds) of the start of the chunk of data corresponding to
+ * these results. If it is set to the value -1, it signifies the absence of a timestamp. This is
+ * only used for classification on time series (e.g. audio classification). In these use cases, the
+ * amount of data to process might exceed the maximum size that the model can process: to solve
+ * this, the input data is split into multiple chunks starting at different timestamps.
+ */
+@property(nonatomic, readonly) NSInteger timestampMs;
+
+/**
+ * Initializes a new `MPPClassificationResult` with the given array of classifications and time
+ * stamp (in milliseconds).
+ *
+ * @param classifications An Array of `MPPClassifications` objects containing the predicted
+ * categories for each head of the model.
+ * @param timestampMs The timestamp (in milliseconds) of the start of the chunk of data
+ * corresponding to these results.
+ *
+ * @return An instance of `MPPClassificationResult` initialized with the given array of
+ * classifications and timestampMs.
+ */
+- (instancetype)initWithClassifications:(NSArray<MPPClassifications *> *)classifications
+                            timestampMs:(NSInteger)timestampMs NS_DESIGNATED_INITIALIZER;
+
+- (instancetype)init NS_UNAVAILABLE;
+
++ (instancetype)new NS_UNAVAILABLE;
+
+@end
+
+NS_ASSUME_NONNULL_END

mediapipe/tasks/ios/components/containers/sources/MPPClassificationResult.m

@@ -0,0 +1,51 @@
+// Copyright 2023 The MediaPipe Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "mediapipe/tasks/ios/components/containers/sources/MPPClassificationResult.h"
+
+@implementation MPPClassifications
+
+- (instancetype)initWithHeadIndex:(NSInteger)headIndex
+                         headName:(nullable NSString *)headName
+                       categories:(NSArray<MPPCategory *> *)categories {
+  self = [super init];
+  if (self) {
+    _headIndex = headIndex;
+    _headName = headName;
+    _categories = categories;
+  }
+  return self;
+}
+
+- (instancetype)initWithHeadIndex:(NSInteger)headIndex
+                       categories:(NSArray<MPPCategory *> *)categories {
+  return [self initWithHeadIndex:headIndex headName:nil categories:categories];
+}
+
+@end
+
+@implementation MPPClassificationResult
+
+- (instancetype)initWithClassifications:(NSArray<MPPClassifications *> *)classifications
+                            timestampMs:(NSInteger)timestampMs {
+  self = [super init];
+  if (self) {
+    _classifications = classifications;
+    _timestampMs = timestampMs;
+  }
+
+  return self;
+}
+
+@end

mediapipe/tasks/ios/components/containers/utils/BUILD

@@ -0,0 +1,40 @@
+# Copyright 2023 The MediaPipe Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+package(default_visibility = ["//mediapipe/tasks:internal"])
+
+licenses(["notice"])
+
+objc_library(
+    name = "MPPCategoryHelpers",
+    srcs = ["sources/MPPCategory+Helpers.mm"],
+    hdrs = ["sources/MPPCategory+Helpers.h"],
+    deps = [
+        "//mediapipe/framework/formats:classification_cc_proto",
+        "//mediapipe/tasks/ios/common/utils:NSStringHelpers",
+        "//mediapipe/tasks/ios/components/containers:MPPCategory",
+    ],
+)
+
+objc_library(
+    name = "MPPClassificationResultHelpers",
+    srcs = ["sources/MPPClassificationResult+Helpers.mm"],
+    hdrs = ["sources/MPPClassificationResult+Helpers.h"],
+    deps = [
+        ":MPPCategoryHelpers",
+        "//mediapipe/tasks/cc/components/containers/proto:classifications_cc_proto",
+        "//mediapipe/tasks/ios/common/utils:NSStringHelpers",
+        "//mediapipe/tasks/ios/components/containers:MPPClassificationResult",
+    ],
+)

mediapipe/tasks/ios/components/containers/utils/sources/MPPCategory+Helpers.h

@@ -1,4 +1,4 @@
-// Copyright 2022 The MediaPipe Authors.
+// Copyright 2023 The MediaPipe Authors.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -12,15 +12,15 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "mediapipe/tasks/cc/components/processors/proto/classifier_options.pb.h"
+#include "mediapipe/framework/formats/classification.pb.h"
-
+#import "mediapipe/tasks/ios/components/containers/sources/MPPCategory.h"
-#import "mediapipe/tasks/ios/components/processors/sources/MPPClassifierOptions.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
-@interface MPPClassifierOptions (Helpers)
+@interface MPPCategory (Helpers)
-- (void)copyToProto:
+
-    (mediapipe::tasks::components::processors::proto::ClassifierOptions *)classifierOptionsProto;
++ (MPPCategory *)categoryWithProto:(const ::mediapipe::Classification &)classificationProto;
+
 @end
 
 NS_ASSUME_NONNULL_END

mediapipe/tasks/ios/components/containers/utils/sources/MPPCategory+Helpers.mm

@@ -0,0 +1,42 @@
+// Copyright 2023 The MediaPipe Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "mediapipe/tasks/ios/common/utils/sources/NSString+Helpers.h"
+#import "mediapipe/tasks/ios/components/containers/utils/sources/MPPCategory+Helpers.h"
+
+namespace {
+using ClassificationProto = ::mediapipe::Classification;
+}
+
+@implementation MPPCategory (Helpers)
+
++ (MPPCategory *)categoryWithProto:(const ClassificationProto &)clasificationProto {
+  NSString *categoryName;
+  NSString *displayName;
+
+  if (clasificationProto.has_label()) {
+    categoryName = [NSString stringWithCppString:clasificationProto.label()];
+  }
+
+  if (clasificationProto.has_display_name()) {
+    displayName = [NSString stringWithCppString:clasificationProto.display_name()];
+  }
+
+  return [[MPPCategory alloc] initWithIndex:clasificationProto.index()
+                                      score:clasificationProto.score()
+                               categoryName:categoryName
+                                displayName:displayName];
+}
+
+@end

mediapipe/tasks/ios/components/containers/utils/sources/MPPClassificationResult+Helpers.h

@@ -0,0 +1,35 @@
+// Copyright 2023 The MediaPipe Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "mediapipe/tasks/cc/components/containers/proto/classifications.pb.h"
+#import "mediapipe/tasks/ios/components/containers/sources/MPPClassificationResult.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface MPPClassifications (Helpers)
+
++ (MPPClassifications *)classificationsWithProto:
+    (const mediapipe::tasks::components::containers::proto::Classifications &)classificationsProto;
+
+@end
+
+@interface MPPClassificationResult (Helpers)
+
++ (MPPClassificationResult *)classificationResultWithProto:
+    (const mediapipe::tasks::components::containers::proto::ClassificationResult &)
+        classificationResultProto;
+
+@end
+
+NS_ASSUME_NONNULL_END

mediapipe/tasks/ios/components/containers/utils/sources/MPPClassificationResult+Helpers.mm

@@ -0,0 +1,68 @@
+// Copyright 2023 The MediaPipe Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "mediapipe/tasks/ios/common/utils/sources/NSString+Helpers.h"
+#import "mediapipe/tasks/ios/components/containers/utils/sources/MPPCategory+Helpers.h"
+#import "mediapipe/tasks/ios/components/containers/utils/sources/MPPClassificationResult+Helpers.h"
+
+namespace {
+using ClassificationsProto = ::mediapipe::tasks::components::containers::proto::Classifications;
+using ClassificationResultProto =
+    ::mediapipe::tasks::components::containers::proto::ClassificationResult;
+}  // namespace
+
+@implementation MPPClassifications (Helpers)
+
++ (MPPClassifications *)classificationsWithProto:
+    (const ClassificationsProto &)classificationsProto {
+  NSMutableArray<MPPCategory *> *categories =
+      [NSMutableArray arrayWithCapacity:(NSUInteger)classificationsProto.classification_list()
+                                            .classification_size()];
+  for (const auto &classification : classificationsProto.classification_list().classification()) {
+    [categories addObject:[MPPCategory categoryWithProto:classification]];
+  }
+
+  NSString *headName;
+  if (classificationsProto.has_head_name()) {
+    headName = [NSString stringWithCppString:classificationsProto.head_name()];
+  }
+
+  return [[MPPClassifications alloc] initWithHeadIndex:(NSInteger)classificationsProto.head_index()
+                                              headName:headName
+                                            categories:categories];
+}
+
+@end
+
+@implementation MPPClassificationResult (Helpers)
+
++ (MPPClassificationResult *)classificationResultWithProto:
+    (const ClassificationResultProto &)classificationResultProto {
+  NSMutableArray *classifications = [NSMutableArray
+      arrayWithCapacity:(NSUInteger)classificationResultProto.classifications_size()];
+  for (const auto &classificationsProto : classificationResultProto.classifications()) {
+    [classifications addObject:[MPPClassifications classificationsWithProto:classificationsProto]];
+  }
+
+  NSInteger timestampMs = 0;
+  if (classificationResultProto.has_timestamp_ms()) {
+    timestampMs = (NSInteger)classificationResultProto.timestamp_ms();
+  }
+
+  return [[MPPClassificationResult alloc] initWithClassifications:classifications
+                                                      timestampMs:timestampMs];
+  ;
+}
+
+@end

mediapipe/tasks/ios/components/processors/BUILD

@@ -1,23 +0,0 @@
-# Copyright 2022 The MediaPipe Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-package(default_visibility = ["//mediapipe/tasks:internal"])
-
-licenses(["notice"])
-
-objc_library(
-    name = "MPPClassifierOptions",
-    srcs = ["sources/MPPClassifierOptions.m"],
-    hdrs = ["sources/MPPClassifierOptions.h"],
-)

mediapipe/tasks/ios/components/processors/sources/MPPClassifierOptions.h

@@ -1,60 +0,0 @@
-// Copyright 2022 The MediaPipe Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#import <Foundation/Foundation.h>
-
-NS_ASSUME_NONNULL_BEGIN
-
-/**
- * Holds settings for any single iOS MediaPipe classification task.
- */
-NS_SWIFT_NAME(ClassifierOptions)
-@interface MPPClassifierOptions : NSObject <NSCopying>
-
-/**
- * The locale to use for display names specified through the TFLite Model
- * Metadata, if any. Defaults to English.
- */
-@property(nonatomic, copy) NSString *displayNamesLocale;
-
-/**
- * The maximum number of top-scored classification results to return. If < 0,
- * all available results will be returned. If 0, an invalid argument error is
- * returned.
- */
-@property(nonatomic) NSInteger maxResults;
-
-/**
- * Score threshold to override the one provided in the model metadata (if any).
- * Results below this value are rejected.
- */
-@property(nonatomic) float scoreThreshold;
-
-/**
- * The allowlist of category names. If non-empty, detection results whose
- * category name is not in this set will be filtered out. Duplicate or unknown
- * category names are ignored. Mutually exclusive with categoryDenylist.
- */
-@property(nonatomic, copy) NSArray<NSString *> *categoryAllowlist;
-
-/**
- * The denylist of category names. If non-empty, detection results whose
- * category name is in this set will be filtered out. Duplicate or unknown
- * category names are ignored. Mutually exclusive with categoryAllowlist.
- */
-@property(nonatomic, copy) NSArray<NSString *> *categoryDenylist;
-
-@end
-
-NS_ASSUME_NONNULL_END

mediapipe/tasks/ios/components/processors/sources/MPPClassifierOptions.m

@@ -1,40 +0,0 @@
-// Copyright 2022 The MediaPipe Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#import "mediapipe/tasks/ios/components/processors/sources/MPPClassifierOptions.h"
-
-@implementation MPPClassifierOptions
-
-- (instancetype)init {
-  self = [super init];
-  if (self) {
-    _maxResults = -1;
-    _scoreThreshold = 0;
-  }
-  return self;
-}
-
-- (id)copyWithZone:(NSZone *)zone {
-  MPPClassifierOptions *classifierOptions = [[MPPClassifierOptions alloc] init];
-
-  classifierOptions.scoreThreshold = self.scoreThreshold;
-  classifierOptions.maxResults = self.maxResults;
-  classifierOptions.categoryDenylist = self.categoryDenylist;
-  classifierOptions.categoryAllowlist = self.categoryAllowlist;
-  classifierOptions.displayNamesLocale = self.displayNamesLocale;
-
-  return classifierOptions;
-}
-
-@end

mediapipe/tasks/ios/components/processors/utils/sources/MPPClassifierOptions+Helpers.mm

@@ -1,43 +0,0 @@
-// Copyright 2022 The MediaPipe Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#import "mediapipe/tasks/ios/common/utils/sources/NSString+Helpers.h"
-#import "mediapipe/tasks/ios/components/processors/utils/sources/MPPClassifierOptions+Helpers.h"
-
-namespace {
-using ClassifierOptionsProto = ::mediapipe::tasks::components::processors::proto::ClassifierOptions;
-}
-
-@implementation MPPClassifierOptions (Helpers)
-
-- (void)copyToProto:(ClassifierOptionsProto *)classifierOptionsProto {
-  classifierOptionsProto->Clear();
-
-  if (self.displayNamesLocale) {
-    classifierOptionsProto->set_display_names_locale(self.displayNamesLocale.cppString);
-  }
-
-  classifierOptionsProto->set_max_results((int)self.maxResults);
-  classifierOptionsProto->set_score_threshold(self.scoreThreshold);
-
-  for (NSString *category in self.categoryAllowlist) {
-    classifierOptionsProto->add_category_allowlist(category.cppString);
-  }
-
-  for (NSString *category in self.categoryDenylist) {
-    classifierOptionsProto->add_category_denylist(category.cppString);
-  }
-}
-
-@end