TBarcode1D_Patch

The component is used to create the Patch Code. It's defined in the pPatch unit.

A Patch Code is a pattern of parallel, alternating black bars and spaces that is printed on a document. Kodak Scanners which have Patch Code reading capability can recognize patch documents and automatically assign a document image level, increment the document image address, or perform Color on the Fly functionality.

The following six codes are in use:

• Patch 1: Patch Type 1 can be used by the host for post-scan image control for the i800/i1800 (with image addressing) Series Scanners (they are not used for image addressing).
• Patch 2: Patch Type 2 can be used to assigns image level 2 to the current document.
• Patch 3: Patch Type 3 can be used to assigns image level 3 to the current document.
• Patch 4 / Toggle Patch: Patch Type 4 can be used by the host for post-scan image control for the i800/i1800 (with image addressing) Series Scanners (they are not used for image addressing). The Toggle Patch may be used to switch back and forth from bi-tonal and color/grayscale scanning for the i280, 3590C, i600, i800 and i1800 (without image addressing) Series Scanners. This provides Color on the Fly during capture, with no need for post-scan processing by the host application.
• Patch 6: Patch Type 6 can be used by the host for post-scan image control for the i800/i1800 (with image addressing) Series Scanners (they are not used for image addressing).
• Patch T / Transfer Patch: Patch Type T can be used to assigns a predefined image level to the next document. The predefined image level is based upon the transfer patch definition which is defined for each application. For example, if the transfer patch definition is image level 2, then use of a transfer patch assigns image level 2 to the next document.

(*): The Data property, OnInvalidDataLength and OnInvalidDataChar events are available only for the Delphi/C++ Builder 2009 or later.

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