Image acquisition:All document pages are copied and then the OCR engine converts the digital document into a two-color or black-and-white version. The scanned-in image or bitmap is analyzed for light and dark portions. The program then identifies the dark portions as characters that need to...
Index An index is a list of data, such as group offilesordatabaseentries. It is typically saved in aplain textformat that can be quickly scanned by a search algorithm. This significantly speeds up searching and sorting operations on data referenced by the index. Indexes often include ...
PropSheet_SetHeaderBitmapResource macro (Windows) IShellView::EnableModelessSV method (Windows) MRUCMPPROC callback function (Windows) GetGuideIndex function (Windows) IInputPersonalizationWordSink::TextIsCompleted method (Windows) _IMSVidCtlEvents::MouseDown method (Windows) ForegroundIdleProc callback...
Indexing Druid uses concise and roaring compressed bitmap indexes to create indexes that help in faster filtering. Timestamp Partitioning Every data in Druid must have a timestamp column as the data is always partitioned by time, and every query has a time filter. Easy Integration with Existing...
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Plan for schema evolution: If your data schema is likely to evolve, plan for schema evolution in advance. Choose a storage format that supports schema evolution and design strategies for managing schema changes while minimizing disruption to existing processes. Leverage indexing: Continuously analyze th...
The first step of OCR is using a scanner to process the physical form of a document. Once all pages are copied, OCR software converts the document into a two-color, or black and white, version. The scanned-in image orbitmapis analyzed for light and dark areas, where the dark areas ...
First, it uses a bitmap to represent the availability of any given page. This is quite efficient for the common cases, where there is a mix of pages included and excluded. For the common page size of 4096 bytes, each gigabyte of physical memory requires 32KiB of bitmap space in the ...
Indexing Type “Bitmap” supported?NoYes Index Type “Expression” supported?NoYes Covering indexes(It allows the retrieval of data by just scanning the index only. There is no need to scan the table data. Very helpful in case of a large number of rows/millions)YesYes ...
It is important to understand that the MQ files exist in pairs - for example, the file P0003420.MQ requires its partner L0003420.MQ. The 4MB file contains the message data and the 8kB file is an indexing bitmap. If you lose the indexing bitmap, the message data cannot ...