diff --git a/examples/testImage.php b/examples/testImage.php
index 378ce3b..572666b 100644
--- a/examples/testImage.php
+++ b/examples/testImage.php
@@ -30,6 +30,9 @@ foreach ($imageIterator as $row => $pixels) {
     $imageIterator->syncIterator();
 }
 
+$imagick->setImageCompressionQuality(100);
+// $imagick->setCompressionQuality(100);
+
 $imagick->writeImage("/media/yuanjiajia/zhiTai_300GB_P4/LuxcoreModel/normal_maps1-g.jpg");
 
 
diff --git a/src/utils/MatHelper.php b/src/utils/MatHelper.php
index 922e49d..91fb068 100644
--- a/src/utils/MatHelper.php
+++ b/src/utils/MatHelper.php
@@ -80,6 +80,7 @@ class MatHelper{
             $metalnessTextureSavaPath = $cacheFileDir.'/'.$fileName.'_metalness'.$extension;
             $metalnessTexture = new Imagick($metallicTextureSavaPath);
             $metalnessTexture->separateImageChannel(Imagick::CHANNEL_BLUE);
+            $metalnessTexture->setImageCompressionQuality(100);
             $metalnessTexture->writeImage($metalnessTextureSavaPath);
             $metalnessTexture = new ImageMap(
                 ['file' => $metalnessTextureSavaPath]
@@ -92,6 +93,7 @@ class MatHelper{
             $roughnessTextureSavaPath = $cacheFileDir.'/'.$fileName.'_roughness'.$extension;
             $roughnessTexture = new Imagick($metallicTextureSavaPath);
             $roughnessTexture->separateImageChannel(Imagick::CHANNEL_GREEN);
+            $roughnessTexture->setImageCompressionQuality(100);
             $roughnessTexture->writeImage($roughnessTextureSavaPath);
             $roughnessTexture = new ImageMap(
                 ['file' => $roughnessTextureSavaPath]
@@ -112,7 +114,7 @@ class MatHelper{
             $fileName = preg_replace('/(\.[^\.]+)$/','',basename($textureSavaPath));
             $extension = preg_replace('/^('.$fileName.')+/','',basename($textureSavaPath));
             $textureInvertGPath = $cacheFileDir.'/'.$fileName.'_InvertG'.$extension;
-            $imagick = new \Imagick($textureSavaPath);
+            $imagick = new Imagick($textureSavaPath);
             $imageIterator = $imagick->getPixelIterator();
             foreach ($imageIterator as $row => $pixels) {
                 foreach ($pixels as $column => $pixel) {
@@ -127,6 +129,7 @@ class MatHelper{
                 }
                 $imageIterator->syncIterator();
             }
+            $imagick->setImageCompressionQuality(100);
             $imagick->writeImage($textureInvertGPath);