Bind value to image dynamically in angular

Question

I am generating multi qr code image and need to bind scr.Value to image tag.The image doesn't show for me.Pls let me know any changes to be done to this line <img class='boxqrcode' [src]="'data:image/png;base64,' + {{scr.Value}}">

<div class="Qrcodediv" *ngFor="let scr of sreenItemsList">
 <img class='boxqrcode' src="'data:image/png;base64,' + {{scr.Value}}">
</div>

  for (let i = 0; i < qr.Image.length; i++) {             
            var a = qr.Image[i]
            this.sreenItemsList.push(a);          
        }