bitmap example

Most of the indexes we use today are generallyB*treeindex that stores key values and key values in the index structure.RowID,and is one by one corresponds. A bitmap index is primarily created for columns of the same value(Example: category, operator, DepartmentID,WarehouseIDwait),stores key values and starts and ends in an index row of an index blockRowid,and the location encoding of these key values,each o

The format of the bitmap is as follows:1. File header information block0000-0001: File identification, for the letter ASCII code "BM".0002-0005: File size.0006-0009: Reserved, each byte is filled with "00".000A-000D: Records the starting position of the image data area. Each byte of information meaning is: The file header information block size, image description information block size, image color table size, reserved (for 01).2. Image description In

1. Description of the problemThe integers are sorted by the K 2. Problem AnalysisThere are a number of sorting methods available for sorting: Insert sort, merge sort, quick sort, hill sort, etc. Each sort has a different kind of niche. Why do we need bitmap sorting? All internal ordering (mentioned above) must be loaded into memory at once for all sorted elements. If there are 1000,000 integers, each integer 4 bytes, it means that at least 4000,000b i

Original: http://wuxiaolong.me/2015/08/10/Drawable-to-Bitmap/Drawable bitmapdrawable turn Bitmap 1234 Resources res = getresources ();drawable drawable = res.getdrawable (r.drawable.myimage);bitmapdrawable BD = (bitmapdrawable) D;Bitmap BM = Bd.getbitmap (); 123456789101112 Publicstatic

FBCBF2FBCBF2FB000000CEF1FBCEF1FBCef1fbcef1fbcef1fbcef1fbcef1fb00 0000CEF1FBCEF1FBCEF1FBCEF1FBCEF1FBCEF1FBCEF1FB000000CFF2FCCFF2FC CFF2FCCFF2FCCF F2fccff2fccff2fc000000d2f2fdd2f2fdd2f2fdd2f2fdd2f2 Fdd2f2fdd2f2fd000000d2f3fcd2f3fcd2f3fcd2f3fcd2f3fcd2f3fcd2f3fc00 0000d4f3fcd4f3fcd4f3fcd4f3fcd4f3fcd4f3fcd4f3fc000000d4f3fcd4f3fc D4F3FCD4F3FCD4F3FCD4F3FCD4F3FC000000D4F3FCD4F3FCD4F3FCD4F3FCD4F3 fcd4f3fcd4f3fc000000} EndThen in the actual application of how to implement the picture to 16

//Private byte[] Bitmap2bytes (Bitmap BM){Bytearrayoutputstream BAOs = new Bytearrayoutputstream ();Bm.compress (Bitmap.CompressFormat.PNG, BAOs);return Baos.tobytearray ();}//public static Bitmap Drawabletobitmap (drawable drawable){Bitmap Bitmap = Bitmap. CreateBitmap (Dra

. Testview example: it contains two classes: testactivity, testview; testactivity inherited fromActivity, testview inheritance and view. In this example, testview is directly used as the window of testactivity, so that we can directlyTestview draws a picture. For more information, see the code in oncreate () of testactivity and. In testview, The ondraw () is used to draw a picture directly. The result is di

A small BitMap Algorithm for big data processing. It processes bitmap data. A small BitMap Algorithm for external sorting of big data (the memory cannot load all sorting elements), removing duplicate elements, and quickly finding randomly deleted elements, the core idea is to use a number as a subscript (index) to index a bit to indicate whether a number exists.

{*************************************** *******************}{}{Image Conversion Processing Unit}{Converting the 24 bits bitmap file to the 256-color bitmap file}{*************************************** *******************} // ================================================ ================================// Program: Chen linmao// Written on: 2002-06-28 // Contact Author: linmaochen@sohu.com// ============