我得到了解决方案。。只是需要添加的图像类型的情况下。在这方面，我们不能转换为png的png。

private function processImageUpload($image,$image_name){
    if($image->getMimeType() !== "image/png"){
        //using image png function to change any image from jpeg to png and store to public folder
        $img  = imagepng(imagecreatefromstring(file_get_contents($image)), config('app.LOGO_MEDIA_PATH').'/'.$image_name.'.png');
    }else{
        $image->move(config('app.LOGO_MEDIA_PATH'), $image_name.'.png');
    }

    /*
    * TODO : change the image replacing functionality
    * from static name to upload to uploads folder
    * and get URL form settings table
    */
    
    $url = "/front/common/img/".$image_name.'.png';
    return $url;
}