Base64 value to export image in headers

Hi,
I need to export image in headers, and used base64 value of the image. But it is not getting rendered in the exports header.
Please check the below code and attachment for the image.

HTML:
<img style="height:45px;width:45px;"
src="data:image/png;base64,Li4vLi4vLi4vLi4vLi4vYXNzZXRzL2ltYWdlcy9wcmludC5wbmc="></div>
 
Base64 Conversion:

getCompanyLogoImageBase64(): any {
        this.Base64Url = null;
        const file = new Blob(['../../../../../assets/images/print.png']);
        const reader = new FileReader();
        reader.readAsDataURL(file);
        reader.onload = () => {
            this.Base64Url = (reader.result).toString();
            console.log('this.Base64Url', this.Base64Url);
            return this.Base64Url;
        };
        reader.onerror = () => {
            return this.Base64Url;
        };
    }

 
Please check the conversion whether it is appropriate or not and provide any solution to render the image in export headers.
 
 
Regards,
Ravi