diff --git a/entry/src/main/ets/MainAbility/glide/transform/CropTransformation.ets b/entry/src/main/ets/MainAbility/glide/transform/CropTransformation.ets
index 0c5691a..e1e0e0a 100644
--- a/entry/src/main/ets/MainAbility/glide/transform/CropTransformation.ets
+++ b/entry/src/main/ets/MainAbility/glide/transform/CropTransformation.ets
@@ -18,7 +18,6 @@ import {AsyncTransform} from "../transform/AsyncTransform.ets"
 import {Constants} from "../constants/Constants.ets"
 import {RequestOption}  from "../../glide/RequestOption.ets"
 import {TransformUtils} from "../transform/TransformUtils.ets"
-
 import image from "@ohos.multimedia.image"
 
 export class CropTransformation implements BaseTransform<PixelMap> {
@@ -68,23 +67,27 @@ export class CropTransformation implements BaseTransform<PixelMap> {
 
       var scaledWidth = scale * pixelMapWidth;
       var scaledHeight = scale * pixelMapHeight;
-      var xx = (this.mWidth - scaledWidth) / 2;
-      var yy = Math.abs(this.getTop(pixelMapHeight));
+      var left = (this.mWidth - scaledWidth) / 2;
+      var top = Math.abs(this.getTop(pixelMapHeight));
       var options = {
         editable: true,
-        desiredRegion: { size: { width: this.mWidth, height: this.mHeight },
-          x: xx,
-          y: yy,
+        desiredRegion: {
+          size: {
+            width: scaledWidth > pixelMapWidth ? pixelMapWidth : scaledWidth,
+            height: scaledHeight > pixelMapHeight ? pixelMapHeight : scaledHeight
+          },
+          x: left < 0 ? 0 : left,
+          y: top < 0 ? 0 : top,
         },
       }
       imageSource.createPixelMap(options)
         .then((data) => {
-        func("", data);
-      })
+          func("", data);
+        })
         .catch((e) => {
-        console.log(Constants.PROJECT_TAG + ";error:" + e);
-        func(e, null);
-      })
+          console.log(Constants.PROJECT_TAG + ";error:" + e);
+          func(e, null);
+        })
     })
   }
 
diff --git a/entry/src/main/ets/MainAbility/glide/utils/CalculatePixelUtils.ets b/entry/src/main/ets/MainAbility/glide/utils/CalculatePixelUtils.ets
index af2b244..693b116 100644
--- a/entry/src/main/ets/MainAbility/glide/utils/CalculatePixelUtils.ets
+++ b/entry/src/main/ets/MainAbility/glide/utils/CalculatePixelUtils.ets
@@ -25,7 +25,7 @@ export namespace CalculatePixelUtils {
     await p.readPixelsToBuffer(bufferData);
     let dataArray = new Uint8Array(bufferData);
 
-    for (let index = 0; index < dataArray.length; index++) {
+    for (let index = 0; index < dataArray.length; index += 4) {
       const r = dataArray[index];
       const g = dataArray[index+1];
       const b = dataArray[index+2];
diff --git a/entry/src/main/ets/MainAbility/glide/utils/FastBlur.ets b/entry/src/main/ets/MainAbility/glide/utils/FastBlur.ets
index 8a19b3a..191f360 100644
--- a/entry/src/main/ets/MainAbility/glide/utils/FastBlur.ets
+++ b/entry/src/main/ets/MainAbility/glide/utils/FastBlur.ets
@@ -77,7 +77,7 @@ export namespace fastBlur {
     await bitmap.readPixelsToBuffer(bufferData);
     let dataArray = new Uint8Array(bufferData);
 
-    for (let index = 0; index < dataArray.length; index++) {
+    for (let index = 0; index < dataArray.length; index+=4) {
       const r = dataArray[index];
       const g = dataArray[index+1];
       const b = dataArray[index+2];
diff --git a/entry/src/main/ets/MainAbility/glide/utils/MaskUtils.ets b/entry/src/main/ets/MainAbility/glide/utils/MaskUtils.ets
index 6e3f46e..5b2b5bd 100644
--- a/entry/src/main/ets/MainAbility/glide/utils/MaskUtils.ets
+++ b/entry/src/main/ets/MainAbility/glide/utils/MaskUtils.ets
@@ -68,10 +68,10 @@ export class MaskUtils {
     let pw_m = 0;
 
     for (let index = 0; index < dataArray_m.length; index += 4) {
-      const r = bufferData_m[index];
-      const g = bufferData_m[index+1];
-      const b = bufferData_m[index+2];
-      const f = bufferData_m[index+3];
+      const r = dataArray_m[index];
+      const g = dataArray_m[index+1];
+      const b = dataArray_m[index+2];
+      const f = dataArray_m[index+3];
 
       let entry = new PixelEntry();
       entry.a = 0;
@@ -81,7 +81,7 @@ export class MaskUtils {
       entry.f = f;
       entry.pixel = ColorUtils.rgb(entry.r, entry.g, entry.b);
       pixEntry.push(entry);
-      if (entry.r == 0 && entry.g == 0 && entry.r == b) {
+      if (entry.r == 0 && entry.g == 0 && entry.b == 0) {
         rgbDataMask[ph_m][pw_m] = rgbData[ph_m][pw_m];
       } else {
         rgbDataMask[ph_m][pw_m] = ColorUtils.rgb(entry.r, entry.g, entry.b);
diff --git a/entry/src/main/ets/MainAbility/glide/utils/PixelUtils.ets b/entry/src/main/ets/MainAbility/glide/utils/PixelUtils.ets
index 73c8d72..03fd923 100644
--- a/entry/src/main/ets/MainAbility/glide/utils/PixelUtils.ets
+++ b/entry/src/main/ets/MainAbility/glide/utils/PixelUtils.ets
@@ -45,7 +45,7 @@ export namespace pixelUtils {
     let pw = 0;
 
 
-    for (let index = 0; index < dataArray.length; index++) {
+    for (let index = 0; index < dataArray.length; index += 4) {
       const r = dataArray[index];
       const g = dataArray[index+1];
       const b = dataArray[index+2];