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第十章項(xiàng)目實(shí)踐-在線瀏覽

2024-08-02 16:42本頁面
  

【正文】 p的濾鏡制作出特殊效果的圖像。三、實(shí)踐環(huán)境1.多媒體計(jì)算機(jī)2.Adobe Photoshop軟件.四、實(shí)驗(yàn)步驟 1.運(yùn)行Photoshop程序。(1)選取一張合適的BMP格式圖片,用Photoshop打開。保存為JPEG格式時(shí),在圖像選項(xiàng)中分別設(shè)置壓縮品質(zhì)為 3后存儲(chǔ)為不同名字的文件。(3)將相關(guān)文件全部打開,比較它們的顯示效果。(1)新建一個(gè)背景色為白色的RGB文件。(3)新建圖層,使用油漆桶工具將之填充為藍(lán)色。(5)使用移動(dòng)工具把各個(gè)圖層中的圓環(huán)按照奧林匹克五環(huán)標(biāo)志的形式擺放——第一行中的藍(lán)、黑、紅三環(huán)互不相交,但第二行中的黃、綠環(huán)卻要分別和藍(lán)、黑環(huán)以及黑、紅環(huán)相交。(7)重復(fù)步驟(6),將其他圓環(huán)相交的地方也做同樣處理。在圖層面版中的“五環(huán)”圖層中點(diǎn)擊鼠標(biāo)右鍵,應(yīng)用彈出菜單中的“效果”命令,為五環(huán)加上陰影效果。圖51 奧運(yùn)五環(huán)制作效果圖4.應(yīng)用濾鏡制作藝術(shù)字。(2)用文本工具輸入白色文字,將文字圖層?xùn)鸥窕缓笃春蠄D層。CCW)命令將整個(gè)圖像逆時(shí)針旋轉(zhuǎn)90度,然后執(zhí)行濾鏡(Filter)/風(fēng)格化(Stylize)/風(fēng)(Wind)命令做出風(fēng)的效果。CW)旋轉(zhuǎn)90度將整個(gè)圖像順時(shí)針旋轉(zhuǎn)90度回復(fù),然后執(zhí)行濾鏡(Filter)/扭曲(Distort)/波紋(Ripple)命令制出圖像抖動(dòng)效果。(6)執(zhí)行圖像(Image)/模式(Mode)/ 顏色表(Color Table)命令,選擇黑體。圖52 火焰字制作效果圖五、實(shí)驗(yàn)結(jié)論及成果1. 項(xiàng)目實(shí)踐報(bào)告。項(xiàng)目實(shí)踐六 VC實(shí)現(xiàn)圖像壓縮編碼一、實(shí)驗(yàn)?zāi)繕?biāo)1. 掌握BMP位圖以及JPEG文件結(jié)構(gòu)。二、實(shí)驗(yàn)內(nèi)容在規(guī)定時(shí)間內(nèi),在教師的指導(dǎo)下,使用VC實(shí)現(xiàn)將BMP格式轉(zhuǎn)換為JPEG格式的程序。2. 參考以下程序編程。//=0xFFE0WORD length。 // = JFIF Y \039。 // 1BYTE versionlo。 // 0 = no units, normal densityWORD xdensity。 // 1 BYTE thumbnwidth。 // 0}APPOinfo={0XFFE0,16,39。,39。,39。,39。,0,1,1,0,1,1,0,0}。 // = 0XFFCOWORD length。// Should be 8: 8 bits/sample WORD height。BYTE nrofponents。 // = 1BYTE HVY。 // Quantization Table number for Y = 0BYTE IdCb。BYTE QTCb。 // = 3BYTE HVCr。 // Normally equal to QTCb = 1}SOFOinfo={0XFFC0,17,8,0,0,3,1,0X11,0,2,0X11,1,3,0X11,1}。 // = 0XFFDBWORD length。// =0: bit 0..3: number of QT = 0 (table for Y)// bit 4. .7: precision of QT, 0 = 8 bitBYTE Ytable[64]。 // = 1 (quantization table for }BYTE Cbtable[64]。// Ytable from DQTinfo should be equal to a scaled and zizag reordered version// of the table which can be found in tables, h: std_luminance_qt // Cbtable , similar = std_chrominance_qt // We39。 // = 0XFFC4 WORD length。 // bit 0. .3: number of KT (0. .3), for V =0 //bit 4 rlype of HT, 0 = DC table, 1 = AC table//bit 5..7: not used, must be 0BYTE YDC_nrcodes[16]。 BYTE HTYACinfo。BYTE YAC_values[162]。ll use the standard Huffman tablesBYTE HTCbDCinfo。BYTE CbDC_values[12]。 // = 0X11BYTE CbAC_nrcodes[16]。}DHTinfo。 // = 0XFFDAWORD length。 // Should be 3: truecolor JPGBYTE IdY。 //O // bits 0. .3: AC table (0.. 3)// bits 4.. 7: DC table (0..3)BYTE IdCb。 //0X11 BYTE IdCr。 //0X11BYTE Ss,Se,Bf。typedef struct { BYTE B, G, R。typedef struct {BYTE length。}bitstring。writebyte((w)%256) 。 // The byte that will be written in the JPG file static SBYTE bytepos=7。// The Huffman tables we39。 static bitstring CbDC_HT[l2]。 static bitstring CbACJtT[256]。static BYTE *category。ll keep the category of the numbers in range: 32767.. 32767static bitstring *bitcode_alloc。 // their bitcoded representation//Precalculated tables for a faster YCbCr RSB transformation// We use a SDWORD table because we*11 scale values by 216 and work with integersstatic SDTORD YRtab[256],YGtab[256],YBtab[256]。 static SDWORD CrRtab[256], CrGtab[256], CrBtab[256]。static float fdtbl_Cb[64]。 //image to be encodedWORD Ximage, Yimage。 // This is the Data Unit of Y after YCbCrRGB transformationstatic SBYTE CbDU[64]。static SWORD DU_DCT[64]。ll zigzagstatic SWORD DU[64]。// JTABLES. Hstatic BYTE zigzag[64] = { 0, 1, 5, 6,14,15,27,28,2, 4, 7,13,16,26,29,42,3, 8,12,17, 25, 30, 41,43,9,11,18,24,31,40,44,53,10, 19, 23, 32, 39, 45, 52, 54,20. 22, 33, 38, 46, 51, 55, 60,21. 34, 37, 47, 50, 56, 59, 61, 35, 36, 48, 49, 57, 58, 62, 63 }。static BYTE std_chrominance_qt [64] = {17. 18, 24, 47, 99, 99, 99, 99,18. 21, 26, 66, 99, 99, 99, 99,24, 26, 56, 99, 99, 99, 99, 99,47, 66, 99, 99, 99, 99, 99, 99,99, 99, 99, 99, 99, 99, 99, 99,99, 99, 99, 99, 99, 99, 99, 99,99, 99, 99, 99, 99, 99, 99, 99,99, 99, 99, 99, 99, 99, 99, 99}。 static BYTE std_dc_luminance_values [12] = (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11} 。 static BYTE std_dc_chrominance_values[l2] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11} 。 static BYTE std_ac_luminance_values[l62]= {0x01, 0x02, 0x03, 0x00, 0x04, Oxll, 0x05, 0x12,0x21,0x31,0x41,0x06,0x13,0x51,0x61, 0x07,0x22,0x71,0x14,0x32,0x81,0x91,Oxal,0x08,0x23,0x42,Oxbl,Oxcl,0x15,0x52,Oxdl,OxfO,0x24,0x33,0x62,0x72,0x82,0x09,OxOa,0x16,0x17,0x18,0x19,Oxla,0x25,0x26,0x27,0x28,0x29,Ox2a,0x34,0x35,0x36,0x37,0x38, 0x39,Ox3a,0x43,0x44,0x45,0x46,0x47,0x48, 0x49,Ox4a,0x53,0x54,0x55,0x56,0x57,0x58, 0x59,Ox5a,0x63,0x64,0x65,0x66,0x67,0x68, 0x69,Ox6a,0x73,0x74,0x75,0x76,0x77,0x78, 0x79,Ox7a,0x83,0x84,0x85,0x86,0x87,0x88, 0x89,Ox8a,0x92,0x93,0x94,0x95,0x96,0x97, 0x98,0x99,Ox9a,Oxa2,Oxa3,Oxa4, Oxa5,Oxa6,Oxa7,Oxa8,Oxa9,Oxaa,Oxb2,Oxb3,Oxb4,Oxbo,Oxb6,Oxb7,Oxb8,Oxb9,Oxba,Oxc2,Oxc3,Oxc4,Oxc5,Oxc6,Oxcv,Oxc8,Oxc9,Oxca, Oxd2,Oxd3,Oxd4,Oxdo,Oxd6,Oxd7,Oxd8, Oxd9,Oxda,Oxel,Oxe2,Oxe3,Oxe4,Oxe5,Oxe6,Oxe7,Oxe8,Oxe9,Oxea,Oxfl,Orf2,Oxf3,Oxf4,Oxf5,Oxf6,Oxf7,Oxf8,Oxf9,Oxfa }。static BYTE std_ac_chrominance_values[l62]={0x00, 0x01, 0x02, 0x03, Oxll, 0x04, 0x05, 0x21,0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,Oxal, Oxbl, Oxcl, 0x09, 0x23, 0x33, 0x52, OxfO,0x15, 0x62, 0x72, Oxdl, OxOa, 0x16, 0x24, 0x34,Oxel, 0x25, Oxfl, 0x17, 0x18, 0x19, Oxla, 0x26,0x27, 0x28, 0x29, Ox2a, 0x35, 0x36, 0x37, 0x38,0x39, Ox3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,0x49, Ox4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,0x59, Ox5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,0x69, Ox6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,0x79, Ox7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,0x88, 0x89, Ox8a, 0x92, 0x93, 0x94, 0x95, 0x96,0x97, 0x98, 0x99, Ox9a, Oxa2, Oxa3, Oxa4, Oxa5,Oxa6, Oxa7, Oxa8, Oxa9, Oxaa, Oxb2, Oxb3, Oxb4,Oxb5, Oxb6, Oxb7, Oxb8, Oxb9, Oxba, Oxc2, Oxc3,Oxc4, Oxc5, Oxc6, Oxc7, OxcS, Oxc9, Oxca, Oxd2,Oxd3, Oxd4, Oxd5, Oxd6, Oxd7, OxdS, Oxd9, Oxda,Oxe2, Oxe3, Oxe4, Oxe5, Oxe6, Oxe7, OxeS, Oxe9,Oxea, Oxf2, Oxf3, Oxf4, Oxf5, Oxf6, Oxf7, Oxf8,Oxf9, Oxfa }。writeword()。J39。writebyte(39。)。I39。writebyte(39。)。writebyte()。writebyte()。writeword()。writebyte()。writewo
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