var instance = new Vintasoft.Twain.WebAcquiredImageJS(twainDeviceManager, imageId, imageInfo);

var value; // Type: any

// Parameters
var canvasWidth; // Type: number
var canvasHeight; // Type: number
var canvasColor; // Type: number
var imageXPosition; // Type: number
var imageYPosition; // Type: number
var successFunc; // Type: function
var errorFunc; // Type: function

value = instance.resizeCanvasAsync(canvasWidth, canvasHeight, canvasColor, imageXPosition, imageYPosition, successFunc, errorFunc);

function resizeCanvasAsync(
   canvasWidth
Width, in pixels, of the image canvas.
 : number, 
   canvasHeight
Height, in pixels, of the image canvas.
 : number, 
   canvasColor
Color of the image canvas. Possible values: 0-AutoDetect, 1-Black, 2-White.
 : number, 
   imageXPosition
X position, in pixels, of the original image within new image.
 : number, 
   imageYPosition
Y position, in pixels, of the original image within new image.
 : number, 
   successFunc
A function that will be executed if request is executed successfully. Function prototype: "successFunc(image)", where 'image' parameter is an instance of WebAcquiredImageJS class.
 : Function, 
   errorFunc
A function that will be executed if request is failed. Function prototype: "errorFunc(image, errorMessage)", where 'image' parameter is an instance of WebAcquiredImageJS class, 'errorMessage' parameter is string that describes error.
 : Function
) : any;

Parameters

canvasWidth

Width, in pixels, of the image canvas.

canvasHeight

Height, in pixels, of the image canvas.

canvasColor

Color of the image canvas. Possible values: 0-AutoDetect, 1-Black, 2-White.

imageXPosition

X position, in pixels, of the original image within new image.

imageYPosition

Y position, in pixels, of the original image within new image.

successFunc

A function that will be executed if request is executed successfully. Function prototype: "successFunc(image)", where 'image' parameter is an instance of WebAcquiredImageJS class.

errorFunc

A function that will be executed if request is failed. Function prototype: "errorFunc(image, errorMessage)", where 'image' parameter is an instance of WebAcquiredImageJS class, 'errorMessage' parameter is string that describes error.

This function sends an asynchronous request to resize canvas of image. If you want to use synchronous request instead of asynchronous request, please use WebAcquiredImageJS.resizeCanvas function.

Reference

WebAcquiredImageJS Class
WebAcquiredImageJS Members