usar canvas typescript Raw

canvas.ts

import { ViewChild } from '@angular/core';

@ViewChild('myCanvas') canvas: any;

canvasElement: any;
ctx:any;

ngAfterViewInit(){
  this.canvasElement = this.canvas.nativeElement;
  this.ctx = this.canvasElement.getContext('2d');
}

otraFuncion(){
  // ejemplo de trabajo con canvas
  this.ctx.clearRect(0,0,this.canvasElement.width,this.canvasElement.height);
  this.ctx.drawImage(this.imagenHTML, 0, 0);
  this.ctx.fillStyle = "blue";
  this.ctx.fillText('kevin',200,120);
  this.ctx.fillText('34159181',200,220);
}