diff --git a/src/canvas/graphic.ts b/src/canvas/graphic.ts
index 838ec1ff5..6f2806fc2 100644
--- a/src/canvas/graphic.ts
+++ b/src/canvas/graphic.ts
@@ -1,7 +1,7 @@
 import Displayable, { DEFAULT_COMMON_STYLE } from '../graphic/Displayable';
 import PathProxy from '../core/PathProxy';
 import { GradientObject } from '../graphic/Gradient';
-import { CanvasPatternObject, InnerCanvasPatternObject, PatternObject } from '../graphic/Pattern';
+import { ImagePatternObject, InnerImagePatternObject, PatternObject } from '../graphic/Pattern';
 import { LinearGradientObject } from '../graphic/LinearGradient';
 import { RadialGradientObject } from '../graphic/RadialGradient';
 import { ZRCanvasRenderingContext } from '../core/types';
@@ -58,10 +58,10 @@ function doStrokePath(ctx: CanvasRenderingContext2D, style: PathStyleProps) {
 export function createCanvasPattern(
     this: void,
     ctx: CanvasRenderingContext2D,
-    pattern: CanvasPatternObject,
+    pattern: ImagePatternObject,
     el: {dirty: () => void}
 ): CanvasPattern {
-    const image = createOrUpdateImage(pattern.image, (pattern as InnerCanvasPatternObject).__image, el);
+    const image = createOrUpdateImage(pattern.image, (pattern as InnerImagePatternObject).__image, el);
     if (isImageReady(image)) {
         const canvasPattern = ctx.createPattern(image, pattern.repeat || 'repeat');
         if (
@@ -132,14 +132,14 @@ function brushPath(ctx: CanvasRenderingContext2D, el: Path, style: PathStyleProp
         if (hasFillPattern) {
             // Pattern might be null if image not ready (even created from dataURI)
             fillPattern = (el.__dirty || !el.__canvasFillPattern)
-                ? createCanvasPattern(ctx, fill as CanvasPatternObject, el)
+                ? createCanvasPattern(ctx, fill as ImagePatternObject, el)
                 : el.__canvasFillPattern;
             el.__canvasFillPattern = fillPattern;
         }
         if (hasStrokePattern) {
             // Pattern might be null if image not ready (even created from dataURI)
             strokePattern = (el.__dirty || !el.__canvasStrokePattern)
-                ? createCanvasPattern(ctx, stroke as CanvasPatternObject, el)
+                ? createCanvasPattern(ctx, stroke as ImagePatternObject, el)
                 : el.__canvasStrokePattern;
             el.__canvasStrokePattern = fillPattern;
         }
diff --git a/src/graphic/Pattern.ts b/src/graphic/Pattern.ts
index da746220f..c3821abf3 100644
--- a/src/graphic/Pattern.ts
+++ b/src/graphic/Pattern.ts
@@ -1,6 +1,6 @@
 import { ImageLike } from '../core/types';
 
-type CanvasPatternRepeat = 'repeat' | 'repeat-x' | 'repeat-y' | 'no-repeat'
+type ImagePatternRepeat = 'repeat' | 'repeat-x' | 'repeat-y' | 'no-repeat'
 
 export interface PatternObjectBase {
     // type is now unused, so make it optional
@@ -15,11 +15,11 @@ export interface PatternObjectBase {
     scaleY?: number
 }
 
-export interface CanvasPatternObject extends PatternObjectBase {
-    repeat?: CanvasPatternRepeat
+export interface ImagePatternObject extends PatternObjectBase {
+    repeat?: ImagePatternRepeat
 }
 
-export interface InnerCanvasPatternObject extends CanvasPatternObject {
+export interface InnerImagePatternObject extends ImagePatternObject {
     // Cached image. Which is created in the canvas painter.
     __image?: ImageLike
 }
@@ -36,7 +36,7 @@ export interface SVGPatternObject extends PatternObjectBase {
     svgHeight?: number
 }
 
-export type PatternObject = CanvasPatternObject | SVGPatternObject
+export type PatternObject = ImagePatternObject | SVGPatternObject
 
 class Pattern {
 
diff --git a/src/svg/helper/PatternManager.ts b/src/svg/helper/PatternManager.ts
index 524b791f5..81c166a33 100644
--- a/src/svg/helper/PatternManager.ts
+++ b/src/svg/helper/PatternManager.ts
@@ -216,8 +216,3 @@ export default class PatternManager extends Definable {
     }
 
 }
-
-type CachedImageObj = {
-    width: number,
-    height: number
-};