diff --git a/transformations/src/main/java/jp/wasabeef/glide/transformations/CropCircleTransformation.java b/transformations/src/main/java/jp/wasabeef/glide/transformations/CropCircleTransformation.java
index 5192a6e..2a6fe0a 100644
--- a/transformations/src/main/java/jp/wasabeef/glide/transformations/CropCircleTransformation.java
+++ b/transformations/src/main/java/jp/wasabeef/glide/transformations/CropCircleTransformation.java
@@ -58,6 +58,7 @@ public class CropCircleTransformation implements Transformation<Bitmap> {
     BitmapShader shader =
         new BitmapShader(source, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP);
     if (width != 0 || height != 0) {
+      // source isn't square, move viewport to center
       Matrix matrix = new Matrix();
       matrix.setTranslate(-width, -height);
       shader.setLocalMatrix(matrix);
diff --git a/transformations/src/main/java/jp/wasabeef/glide/transformations/gpu/KuwaharaFilterTransformation.java b/transformations/src/main/java/jp/wasabeef/glide/transformations/gpu/KuwaharaFilterTransformation.java
index 3b956f0..511b7a4 100644
--- a/transformations/src/main/java/jp/wasabeef/glide/transformations/gpu/KuwaharaFilterTransformation.java
+++ b/transformations/src/main/java/jp/wasabeef/glide/transformations/gpu/KuwaharaFilterTransformation.java
@@ -27,13 +27,7 @@ import jp.co.cyberagent.android.gpuimage.GPUImage;
 import jp.co.cyberagent.android.gpuimage.GPUImageKuwaharaFilter;
 
 /**
- * Kuwahara image abstraction, drawn from the work of Kyprianidis, et. al. in their publication
- * "Anisotropic Kuwahara Filtering on the GPU" within the GPU Pro collection. This produces an
- * oil-painting-like
- * image, but it is extremely computationally expensive, so it can take seconds to render a frame
- * on
- * an iPad 2.
- * This might be best used for still images.
+ * Kuwahara all the colors in the image.
  *
  * The radius to sample from when creating the brush-stroke effect, with a default of 25.
  * The larger the radius, the slower the filter.