diff --git a/library/src/main/ets/components/imageknife/downsampling/BaseDownsampling.ets b/library/src/main/ets/components/imageknife/downsampling/BaseDownsampling.ets
index 87ecafc..43ec034 100644
--- a/library/src/main/ets/components/imageknife/downsampling/BaseDownsampling.ets
+++ b/library/src/main/ets/components/imageknife/downsampling/BaseDownsampling.ets
@@ -1,3 +1,17 @@
+/*
+ * Copyright (C) 2024 Huawei Device Co., Ltd.
+ * 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 { lang } from '@kit.ArkTS';
 
 type ISendable = lang.ISendable;
diff --git a/library/src/main/ets/components/imageknife/downsampling/Downsampler.ets b/library/src/main/ets/components/imageknife/downsampling/Downsampler.ets
index 923a8cc..c97f2cf 100644
--- a/library/src/main/ets/components/imageknife/downsampling/Downsampler.ets
+++ b/library/src/main/ets/components/imageknife/downsampling/Downsampler.ets
@@ -1,3 +1,17 @@
+/*
+ * Copyright (C) 2024 Huawei Device Co., Ltd.
+ * 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 { RequestOption } from '../RequestOption';
 import { FileTypeUtil } from '../utils/FileTypeUtil';
 import { Atleast, AtMost, CenterInside, CenterOutside, DownsampleNone, FitCenter } from './DownsampleStartegy';
diff --git a/library/src/main/ets/components/imageknife/downsampling/downsampleUtils.ets b/library/src/main/ets/components/imageknife/downsampling/downsampleUtils.ets
index bff773a..cf5148b 100644
--- a/library/src/main/ets/components/imageknife/downsampling/downsampleUtils.ets
+++ b/library/src/main/ets/components/imageknife/downsampling/downsampleUtils.ets
@@ -1,6 +1,21 @@
-//假设的枚举类型，与Java中的枚举相似
+/*
+ * Copyright (C) 2024 Huawei Device Co., Ltd.
+ * 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.
+ */
 export enum SampleSizeRounding {
+  //内存优先
   QUALITY,
+  //质量优先
   MEMORY
 }