diff --git a/types/dwt/Dynamsoft.d.ts b/types/dwt/Dynamsoft.d.ts
index 4555d11cad..6ab4dcb829 100644
--- a/types/dwt/Dynamsoft.d.ts
+++ b/types/dwt/Dynamsoft.d.ts
@@ -2999,6 +2999,19 @@ interface WebTwain {
      */
     HTTPUpload(url: string, indices: number[], enumImageType: EnumDWT_ImageType, dataFormat: EnumDWT_UploadDataFormat, asyncSuccessFunc: (httppostresponsestring: string) => void, asyncFailureFunc: (errorCode: number, errorString: string, httppostresponsestring: string) => void): boolean;
 
+    /**
+     * Uploads the images specified by the indices to the HTTP server.
+     * @method WebTwain#HTTPUpload
+     * @param {string} url the url where the images are sent in a POST request.
+     * @param {Array} indices indices specifies which images are to be uploaded.
+     * @param {EnumDWT_ImageType} enumImageType the image format in which the images are to be uploaded.
+     * @param {EnumDWT_UploadDataFormat} dataFormat whether to upload the images as binary or a base64-based string.
+     * @param {string} fileName the name of the image to be uploaded.
+     * @param {function} asyncSuccessFunc the function to call when the upload succeeds. Please refer to the function prototype OnSuccess.
+     * @param {function} asyncFailureFunc the function to call when the upload fails. Please refer to the function prototype OnFailure.
+     */
+    HTTPUpload(url: string, indices: number[], enumImageType: EnumDWT_ImageType, dataFormat: EnumDWT_UploadDataFormat, fileName: string, asyncSuccessFunc: (httpPostResponseString: string) => void, asyncFailureFunc: (errorCode: number, errorString: string, httpPostResponseString: string) => void): boolean;
+
     /**
      * Uploads all images in the buffer to the HTTP server through the HTTP Post method as a Multi-Page TIFF.
      * @method WebTwain#HTTPUploadAllThroughPostAsMultiPageTIFF
@@ -3781,18 +3794,59 @@ interface WebTwain {
      */
     UnregisterEvent(name: string, evt: object): boolean;
 
+    /**
+     * Tag specified images
+     * @method WebTwain#TagImages
+     * @param {number[]} aryImageIndices The indices of the images to tag
+     * @param {string} tagName specifies a tag
+     * @return {boolean}
+     */
     TagImages(aryImageIndices: number[], tagName: string): boolean;
 
+    /**
+     * Sets a default tag that's applied to newly acquired images
+     * @method WebTwain#SetDefaultTag
+     * @param {string} tagName specifies a tag
+     * @return {boolean}
+     */
     SetDefaultTag(tagName: string): boolean;
 
+    /**
+     * Clear the tags from the specified image
+     * @method WebTwain#ClearImageTags
+     * @param {number} sImageIndex specified a image
+     */
     ClearImageTags(sImageIndex: number): boolean;
 
+    /**
+     * Specifies a tag and use it to filter images
+     * @method WebTwain#FilterImagesByTag     
+     * @param {string} tagName specifies a tag
+     * @return {boolean}
+     */
     FilterImagesByTag(tagName: string): boolean;
-
+    
+    /**
+     * Selects all images
+     * @method WebTwain#SelectAllImages
+     * @return {boolean}
+     */
     SelectAllImages(): boolean;
-	
+    
+    /**
+     * Inverts the color of the pixels of the specified image
+     * @method WebTwain#Invert
+     * @param {number} sImageIndex specifies an image
+     * @return {boolean}
+     */
     Invert(sImageIndex: number): boolean;
-	
+    
+    /**
+     * Converts the specified image to black & white
+     * @method WebTwain#ConvertToBW
+     * @param {number} sImageIndex specifies an image
+     * @return {boolean}
+     */
     ConvertToBW(sImageIndex: number): boolean;
 
     /*ignored