diff --git a/arkoala-arkts/arkui/src/extractors.ets b/arkoala-arkts/arkui/src/extractors.ets
index d18f5a6041ddc8a917705978d2e219b8e40aeedb..29a962708036c1fd0e5af44ecc8e417a145f1e3a 100644
--- a/arkoala-arkts/arkui/src/extractors.ets
+++ b/arkoala-arkts/arkui/src/extractors.ets
@@ -23,7 +23,7 @@ export namespace extractors {
     }
 
     export function fromImagePixelMapPtr(ptr: KPointer): image.PixelMap {
-        return new image.PixelMapInner(ptr)
+        return fromPointer("@ohos.multimedia.image.image.PixelMapInner", ptr) as image.PixelMap
     }
 
     function toPointer(obj: Object, declarationName: string, pointerPropName: string): long {
@@ -33,5 +33,16 @@ export namespace extractors {
         }
         throw new Error(`native pointer for ${declarationName} declaration is not found!`)
     }
+
+    // Get Type for exported classes: Type.from<ns.ClassName>()
+    // Get Type for non exported classes: Type.resolve("package.ns.ClassName")
+    function fromPointer(typeName: string, ptr: long): Object {
+        const type = Type.resolve(typeName)
+        if (type instanceof ClassType) {
+            const classType = type as ClassType
+            return classType.make([ptr])
+        }
+        throw new Error(`Type "${typeName}" is not a class type: ${type}`)
+    }
 }
 
diff --git a/arkoala-arkts/modules/ohos/src/multimedia.image.ets b/arkoala-arkts/modules/ohos/src/multimedia.image.ets
index ca7708abb437b1e06086479f38a3b9febc10d99b..aef8628528c06443c9e9463ad4a1fa6ef4d438ee 100644
--- a/arkoala-arkts/modules/ohos/src/multimedia.image.ets
+++ b/arkoala-arkts/modules/ohos/src/multimedia.image.ets
@@ -32,7 +32,7 @@ export namespace image {
         writeBufferToPixels(src: ArrayBuffer): void
     }
 
-    export class PixelMapInner implements PixelMap {
+    class PixelMapInner implements PixelMap {
 
         private nativeObj: long = 0;