diff --git a/core/java/android/hardware/camera2/CaptureRequest.java b/core/java/android/hardware/camera2/CaptureRequest.java
index 5df64e3cca9ec..b25c24d3e6807 100644
--- a/core/java/android/hardware/camera2/CaptureRequest.java
+++ b/core/java/android/hardware/camera2/CaptureRequest.java
@@ -1382,6 +1382,14 @@ public final class CaptureRequest extends CameraMetadata<CaptureRequest.Key<?>>
      * region and output only the intersection rectangle as the metering region in the result
      * metadata.  If the region is entirely outside the crop region, it will be ignored and
      * not reported in the result metadata.</p>
+     * <p>When setting the AE metering regions, the application must consider the additional
+     * crop resulted from the aspect ratio differences between the preview stream and
+     * {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion}. For example, if the {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion} is the full
+     * active array size with 4:3 aspect ratio, and the preview stream is 16:9,
+     * the boundary of AE regions will be [0, y_crop] and
+     * [active_width, active_height - 2 * y_crop] rather than [0, 0] and
+     * [active_width, active_height], where y_crop is the additional crop due to aspect ratio
+     * mismatch.</p>
      * <p>Starting from API level 30, the coordinate system of activeArraySize or
      * preCorrectionActiveArraySize is used to represent post-zoomRatio field of view, not
      * pre-zoom field of view. This means that the same aeRegions values at different
@@ -1604,6 +1612,14 @@ public final class CaptureRequest extends CameraMetadata<CaptureRequest.Key<?>>
      * region and output only the intersection rectangle as the metering region in the result
      * metadata. If the region is entirely outside the crop region, it will be ignored and
      * not reported in the result metadata.</p>
+     * <p>When setting the AF metering regions, the application must consider the additional
+     * crop resulted from the aspect ratio differences between the preview stream and
+     * {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion}. For example, if the {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion} is the full
+     * active array size with 4:3 aspect ratio, and the preview stream is 16:9,
+     * the boundary of AF regions will be [0, y_crop] and
+     * [active_width, active_height - 2 * y_crop] rather than [0, 0] and
+     * [active_width, active_height], where y_crop is the additional crop due to aspect ratio
+     * mismatch.</p>
      * <p>Starting from API level 30, the coordinate system of activeArraySize or
      * preCorrectionActiveArraySize is used to represent post-zoomRatio field of view, not
      * pre-zoom field of view. This means that the same afRegions values at different
@@ -1818,6 +1834,14 @@ public final class CaptureRequest extends CameraMetadata<CaptureRequest.Key<?>>
      * region and output only the intersection rectangle as the metering region in the result
      * metadata.  If the region is entirely outside the crop region, it will be ignored and
      * not reported in the result metadata.</p>
+     * <p>When setting the AWB metering regions, the application must consider the additional
+     * crop resulted from the aspect ratio differences between the preview stream and
+     * {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion}. For example, if the {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion} is the full
+     * active array size with 4:3 aspect ratio, and the preview stream is 16:9,
+     * the boundary of AWB regions will be [0, y_crop] and
+     * [active_width, active_height - 2 * y_crop] rather than [0, 0] and
+     * [active_width, active_height], where y_crop is the additional crop due to aspect ratio
+     * mismatch.</p>
      * <p>Starting from API level 30, the coordinate system of activeArraySize or
      * preCorrectionActiveArraySize is used to represent post-zoomRatio field of view, not
      * pre-zoom field of view. This means that the same awbRegions values at different
diff --git a/core/java/android/hardware/camera2/CaptureResult.java b/core/java/android/hardware/camera2/CaptureResult.java
index 60d5e9eba3e05..1faec5b76524c 100644
--- a/core/java/android/hardware/camera2/CaptureResult.java
+++ b/core/java/android/hardware/camera2/CaptureResult.java
@@ -829,6 +829,14 @@ public class CaptureResult extends CameraMetadata<CaptureResult.Key<?>> {
      * region and output only the intersection rectangle as the metering region in the result
      * metadata.  If the region is entirely outside the crop region, it will be ignored and
      * not reported in the result metadata.</p>
+     * <p>When setting the AE metering regions, the application must consider the additional
+     * crop resulted from the aspect ratio differences between the preview stream and
+     * {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion}. For example, if the {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion} is the full
+     * active array size with 4:3 aspect ratio, and the preview stream is 16:9,
+     * the boundary of AE regions will be [0, y_crop] and
+     * [active_width, active_height - 2 * y_crop] rather than [0, 0] and
+     * [active_width, active_height], where y_crop is the additional crop due to aspect ratio
+     * mismatch.</p>
      * <p>Starting from API level 30, the coordinate system of activeArraySize or
      * preCorrectionActiveArraySize is used to represent post-zoomRatio field of view, not
      * pre-zoom field of view. This means that the same aeRegions values at different
@@ -1301,6 +1309,14 @@ public class CaptureResult extends CameraMetadata<CaptureResult.Key<?>> {
      * region and output only the intersection rectangle as the metering region in the result
      * metadata. If the region is entirely outside the crop region, it will be ignored and
      * not reported in the result metadata.</p>
+     * <p>When setting the AF metering regions, the application must consider the additional
+     * crop resulted from the aspect ratio differences between the preview stream and
+     * {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion}. For example, if the {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion} is the full
+     * active array size with 4:3 aspect ratio, and the preview stream is 16:9,
+     * the boundary of AF regions will be [0, y_crop] and
+     * [active_width, active_height - 2 * y_crop] rather than [0, 0] and
+     * [active_width, active_height], where y_crop is the additional crop due to aspect ratio
+     * mismatch.</p>
      * <p>Starting from API level 30, the coordinate system of activeArraySize or
      * preCorrectionActiveArraySize is used to represent post-zoomRatio field of view, not
      * pre-zoom field of view. This means that the same afRegions values at different
@@ -1926,6 +1942,14 @@ public class CaptureResult extends CameraMetadata<CaptureResult.Key<?>> {
      * region and output only the intersection rectangle as the metering region in the result
      * metadata.  If the region is entirely outside the crop region, it will be ignored and
      * not reported in the result metadata.</p>
+     * <p>When setting the AWB metering regions, the application must consider the additional
+     * crop resulted from the aspect ratio differences between the preview stream and
+     * {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion}. For example, if the {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion} is the full
+     * active array size with 4:3 aspect ratio, and the preview stream is 16:9,
+     * the boundary of AWB regions will be [0, y_crop] and
+     * [active_width, active_height - 2 * y_crop] rather than [0, 0] and
+     * [active_width, active_height], where y_crop is the additional crop due to aspect ratio
+     * mismatch.</p>
      * <p>Starting from API level 30, the coordinate system of activeArraySize or
      * preCorrectionActiveArraySize is used to represent post-zoomRatio field of view, not
      * pre-zoom field of view. This means that the same awbRegions values at different