那位有bmp与jpg转换的源码赞助？

2002-06-13 11:14:46 98 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

利用libjpeg库实现jpg与bmp图片互转指南 jpg与bmp图片互转指南一、原理： jpg与bmp图片格式都是以rgb像素为基础的，但是jpg在bmp的rgb的基础上进行了压缩。而且存储的方式是bgr，因此，在二者转换过程中需要转换对应的格式，而且只需要的到rgb再使用libjpeg库即可进行互相转换。二、转换工具：libjpeg库移植jpeg库 1.下载JPEG库的源代码 http://www.ijg.org/files/ JPEG官方网站 2.jpegsrc.v9a.tar.gz 为源码文件，需要往自己的linux中安装该库阅读详情

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DCMTK:单张jpg、bmp图像转dcm文件网上关于相关系列的文章非常的零散，特别不方便查找，于是查看img2dcm的源码，并将其提取出来作为项目需要，特记录于此。前提在dcm文件中，bmp格式图片和jpg格式图片保存方式完全不同，无压缩的bmp图片是直接将像素信息以tag:value的形式存储在dcm文件中，而有压缩的jpg图片则是先将图片的像素点信息插入进DcmPixelSequence中，然后将DcmPixelSequence以tag：阅读详情

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ustc_tweeg 2002-06-13

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http://www.vckbase.com/code---------------GREAT!

pcman1990 2002-06-13

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http://www.vckbase.com/code
jpeglib.zip可以显示JPEG文件，进行JPEG和BMP之间的相互转换，并可以保存为灰度JPG图像

http://www.paintlib.de/paintlib/
paintlib is a portable C++ class library for image loading, saving and manipulation. Images can be loaded from BMP, GIF, JPEG, PCX, PGM, PICT, PNG, TGA, TIFF and WMF files and saved in BMP, JPEG, PNG and TIFF formats. (copyrighted open source software)

ustc_tweeg 2002-06-13

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to masterz : how to get it?
to mfkzj:ustc_tweeg@163.net wo yao!

mfkzj 2002-06-13

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我这里有一个类要不要？
mfkzj@263.net

masterz 2002-06-13

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need GDI+ header files to compile, need GDI+ dll to run

mfkzj 2002-06-13

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我这里有一个类要不要？
mfkzj@263.net

ustc_tweeg 2002-06-13

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编译通不过呀大虾

wistaria 2002-06-13

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JPEG<->GIF/BMP/TGA/RLE/PPM/PGM
ftp://x2ftp.oulu.fi/pub/msdos/programming/convert/jpg5a.zip
ftp://x2ftp.oulu.fi/pub/msdos/programming/convert/jpg5a386.zip

masterz 2002-06-13

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#include <Stdio.h>
#include <Objbase.h>
#include <Windows.h>
#include <Gdiplus.h>
#include <GdiPlusEnums.h>
using namespace Gdiplus;
#pragma comment(lib,"gdiplus")
// Helper functions
int GetCodecClsid(const WCHAR*, CLSID*);

int main()
{
CLSID codecClsid;
EncoderParameters encoderParameters;
long quality;
Status stat;
GdiplusStartupInput gdiplusStartupInput;
ULONG gdiplusToken;
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
{
// Get an image from the disk.
Image image(L"F:\\ddd.bmp");

// Get the CLSID of the JPEG codec.
GetCodecClsid(L"image/jpeg", &codecClsid);

// Before we call Image::Save, we must initialize an
// EncoderParameters object. The EncoderParameters object
// has an array of EncoderParameter objects. In this
// case, there is only one EncoderParameter object in the array.
// The one EncoderParameter object has an array of values.
// In this case, there is only one value (of type LONG)
// in the array. We will set this value to 0, 50, and 100.

encoderParameters.Count = 1;
encoderParameters.Parameter[0].Guid = EncoderQuality;
encoderParameters.Parameter[0].Type = EncoderParameterValueTypeLong;
encoderParameters.Parameter[0].NumberOfValues = 1;

// Save the image as a JPEG with quality level 0.
quality = 0;
encoderParameters.Parameter[0].Value = &quality;
stat = image.Save(L"Shapes001.jpg", &codecClsid, &encoderParameters);

if(stat == Ok)
wprintf(L"%s saved successfully.\n", L"Shapes001.jpg");
else
wprintf(L"%d Attempt to save %s failed.\n", stat, L"Shapes001.jpg");

// Save the image as a JPEG with quality level 50.
quality = 50;
encoderParameters.Parameter[0].Value = &quality;
stat = image.Save(L"Shapes050.jpg", &codecClsid, &encoderParameters);

if(stat == Ok)
wprintf(L"%s saved successfully.\n", L"Shapes050.jpg");
else
wprintf(L"%d Attempt to save %s failed.\n", stat, L"Shapes050.jpg");

// Save the image as a JPEG with quality level 100.
quality = 100;
encoderParameters.Parameter[0].Value = &quality;
stat = image.Save(L"Shapes100.jpg", &codecClsid, &encoderParameters);

if(stat == Ok)
wprintf(L"%s saved successfully.\n", L"Shapes100.jpg");
else
wprintf(L"%d Attempt to save %s failed.\n", stat, L"Shapes100.jpg");
}
GdiplusShutdown(gdiplusToken);
return 0;
} // main
int GetCodecClsid(const WCHAR* format, CLSID* pClsid)
{
UINT num = 0; // number of image encoders
UINT size = 0; // size of the image encoder array in bytes

ImageCodecInfo* pImageCodecInfo = NULL;

GetImageEncodersSize(&num, &size);
if(size == 0)
return -1; // Failure

pImageCodecInfo = (ImageCodecInfo*)(malloc(size));
if(pImageCodecInfo == NULL)
return -1; // Failure

GetImageEncoders(num, size, pImageCodecInfo);

for(int j = 0; j < num; ++j)
{
if( wcscmp(pImageCodecInfo[j].MimeType, format) == 0 )
{
*pClsid = pImageCodecInfo[j].Clsid;
return j; // Success
}
} // for

return -1; // Failure

} // GetCodecClsid
//download gdiplus.dll
//http://www.microsoft.com/downloads/release.asp?releaseid=32738
//Platform SDK Redistributable: GDI+ RTM

masterz 2002-06-13

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那位有bmp与jpg转换的源码赞助？

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