Supported Capabilities
The following list is supported capabilities in EPSON TWAIN driver. Depends on driver version and option unit, some capabilities are not supported.
| CAP_AUTOFEED | MSG_SET to TRUE to enable Source’s automatic feeding |
| CAP_AUTOMATICSENSEMEDIUM | MSG_SET to TRUE to enable automatic switch of feeder/flatbed |
| CAP_AUTOSCAN | MSG_SET to TRUE to enable Scanner’s pre-scanning |
| CAP_CLEARPAGE | MSG_SET to TRUE to eject the current page and leave the feeder acquire area empty (Multi Photo Feeder only) |
| CAP_CUSTOMDSDATA | Indicates if getting/setting of scan parameter list is supported |
| CAP_DEVICEONLINE | Determines if hardware is on and ready |
| CAP_DUPLEX | Indicates whether the scanner supports duplex |
| CAP_DUPLEXENABLED | MSG_SET to TRUE to scan both sides of a paper; otherwise, scan only one side of the image |
| CAP_ENABLEDSUIONLY | Indicates if Sources built-in user interface for setting is supported |
| CAP_FEEDERALIGNMENT | Gets alignment position for ADF scanning |
| CAP_FEEDERENABLED | If TRUE, Source’s feeder is available |
| CAP_FEEDERLOADED | If TRUE, Source has documents loaded in feeder (MSG_GET only) |
| CAP_FEEDPAGE | MSG_SET to TRUE to eject the current page and leave the feeder acquire area empty (Multi Photo Feeder only) |
| CAP_INDICATORS | Use the Source’s progress indicator (valid only when ShowUI==FALSE) |
| CAP_SERIALNUMBER | MSG_GET to obtain the serial number that is stored in the scanner |
| CAP_UICONTROLLABLE | Indicates that Source supports acquisitions with UI disabled |
| CAP_XFERCOUNT | The number of sheets of paper to be scanned |
| ICAP_AUTOMATICBORDERDETECTION | MSG_SET to TRUE to enable Auto Size cropping |
| ICAP_AUTOMATICDESKEW | Specify if automatic de-skew is applied or not |
| ICAP_AUTOMATICROTATE | Specify if automatic rotation is applied or not |
| ICAP_AUTOSIZE | Specify auto size detection |
| ICAP_BITDEPTH | Pixel bit depth for current value of ICAP_PIXELTYPE |
| ICAP_BITORDER | Specifies how the bytes in an image are filled by the Source |
| ICAP_BRIGHTNESS | Source brightness values |
| ICAP_COMPRESSION | Compression method for Buffered Memory Transfers |
| ICAP_CONTRAST | Source contrast values |
| ICAP_GAMMA | Gamma correction value for the image data |
| ICAP_HALFTONES | Square-cell halftone (dithering) matrix to be used |
| ICAP_IMAGEMERGE | Stitch images of front side and back side images |
| ICAP_LIGHTSOURCE | Dropout color |
| ICAP_ORIENTATION | Specifies paper feeding orientation |
| ICAP_PHYSICALHEIGHT | Maximum height Source can acquire (in ICAP_UNITS) |
| ICAP_PHYSICALWIDTH | Maximum width Source can acquire (in ICAP_UNITS) |
| ICAP_PIXELFLAVOR | Sense of the pixel whose numeric value is zero |
| ICAP_PIXELTYPE | The type of pixel data (B/W, gray, color, etc.) |
| ICAP_PLANARCHUNKEY | Color data format – Planar or Chunky |
| ICAP_SUPPORTEDSIZES | The sizes that data source supports |
| ICAP_THRESHOLD | Specifies the dividing line between black and white values |
| ICAP_UNDEFINEDIMAGESIZE | MSG_SET to TRUE to enable Auto Size cropping. |
| ICAP_UNITS | Unit of measure (inches, centimeters, etc.) |
| ICAP_XFERMECH | Transfer mechanism – used to learn options and set-up for upcoming transfer |
| ICAP_XRESOLUTION | Current/Available optical resolutions for x-axis |
| ICAP_XSCALING | Source scaling value (1.0 = 100%) for x-axis |
| ICAP_YRESOLUTION | Current/Available optical resolutions for y-axis |
| ICAP_YSCALING | Source scaling value (1.0 = 100%) for y-axis |
