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

var value; // Type: any

// Parameters
var x; // Type: number
var y; // Type: number
var width; // Type: number
var height; // Type: number
var successFunc; // Type: function
var errorFunc; // Type: function

value = instance.cropAsync(x, y, width, height, successFunc, errorFunc);

function cropAsync(
   x
X-coordinate, in pixels, of the upper-left corner of the crop rectangle.
 : number, 
   y
Y-coordinate, in pixels, of the upper-left corner of the crop rectangle.
 : number, 
   width
Width, in pixels, of the crop rectangle.
 : number, 
   height
Height, in pixels, of the crop rectangle.
 : 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

x

X-coordinate, in pixels, of the upper-left corner of the crop rectangle.

y

Y-coordinate, in pixels, of the upper-left corner of the crop rectangle.

width

Width, in pixels, of the crop rectangle.

height

Height, in pixels, of the crop rectangle.

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 crop an image. If you want to use synchronous request instead of asynchronous request, please use WebAcquiredImageJS.crop function.

Reference

WebAcquiredImageJS Class
WebAcquiredImageJS Members