php 调用扫描仪,如何从浏览器中触发扫描仪？

包括scanner.js：

，并呼吁scanner.scan：

function scanToWebPageAndUploadToWebServer() {

scanner.scan(displayImagesOnPage,

{

"twain_cap_setting": {

"ICAP_PIXELTYPE": "TWPT_GRAY",

"ICAP_XRESOLUTION": "200",

"ICAP_YRESOLUTION": "200"

},

"prompt_scan_more": true,

"discard_blank_pages": "false",

"blank_page_threshold": "0.02",

"output_settings": [

{

"type": "return-base64-thumbnail",

"format": "jpg",

"thumbnail_height": 200

},

{

"type": "upload",

"format": "pdf",

"pdf_force_black_white": "false",

"pdfa_compliant": "false",

"pdf_text_line": "By ${USERNAME} on ${DATETIME}",

"exif": {

"DocumentName": "Doc Scan Powered by Asprise.com",

"UserComment": "Scanned using Asprise software"

},

"upload_target": {

"url": "https://asprise.com/scan/applet/upload.php?action=dump",

"max_retries": 2,

"post_fields": {

"provider": "Asprise"

},

"cookies": "name=Asprise; domain=asprise.com",

"auth": "user:pass",

"headers": [

"Referer: http://asprise.com"

],

"log_file": "null",

"max_operation_time": 600

}

}

]

}

);

}