数字人物指纹作为WSQ捕获图像
数字人物指纹作为WSQ捕获图像
提问于 2019-10-24 13:50:12
我使用数字人物指纹设备，需要将图像捕获为WSQ格式，而不是Bmp格式
使用C# DigitalPersona One Touch for Windows
样本码
private DPFP.Capture.SampleConversion SampleConversion;
private Bitmap Image;
public async void OnComplete(object Capture, string ReaderSerialNumber, DPFP.Sample Sample)
{
var imgName = string.Format("fingerprint{0}.bmp", DateTime.Now.Ticks);
SampleConversion.ConvertToPicture(Sample, ref Image);
Image.Save(imgName, System.Drawing.Imaging.ImageFormat.Bmp);
}我在C#中找到了将bmp转换为wsq wsqEncodeDecode的库，但是wsq的结果不正确，
任何直接从sdk返回以wsq格式捕获的图像的解决方案？
回答 1
Stack Overflow用户
回答已采纳
发布于 2020-03-20 12:52:54
为了实现我所需要的，我做了以下工作：
我用了两个图书馆
1- AForge.Imaging，AForge.Imaging.Formats和Delta.Wsq DLL
private Bitmap Image;
public async void OnComplete(object Capture, string ReaderSerialNumber, DPFP.Sample Sample)
{
SampleConversion.ConvertToPicture(Sample, ref Image);
Image.RotateFlip(RotateFlipType.Rotate180FlipNone);
Image = resizeImage(364, 400, Image);
var img8bppx = Grayscale.CommonAlgorithms.BT709.Apply(Image);
var rawImageData = Conversions.GdiImageToImageInfo(img8bppx);
WsqEncoder encoder = new WsqEncoder();
var result = encoder.Encode(rawImageData);
}是调整大小的方法。
public Bitmap resizeImage(int newWidth, int newHeight, Image imgPhoto)
{
int sourceWidth = imgPhoto.Width;
int sourceHeight = imgPhoto.Height;
//Consider vertical pics
if (sourceWidth < sourceHeight)
{
int buff = newWidth;
newWidth = newHeight;
newHeight = buff;
}
int sourceX = 0, sourceY = 0, destX = 0, destY = 0;
float nPercent = 0, nPercentW = 0, nPercentH = 0;
nPercentW = ((float)newWidth / (float)sourceWidth);
nPercentH = ((float)newHeight / (float)sourceHeight);
if (nPercentH < nPercentW)
{
nPercent = nPercentH;
destX = System.Convert.ToInt16((newWidth -
(sourceWidth * nPercent)) / 2);
}
else
{
nPercent = nPercentW;
destY = System.Convert.ToInt16((newHeight -
(sourceHeight * nPercent)) / 2);
}
int destWidth = (int)(sourceWidth * nPercent);
int destHeight = (int)(sourceHeight * nPercent);
Bitmap bmPhoto = new Bitmap(newWidth, newHeight,
PixelFormat.Format24bppRgb);
bmPhoto.SetResolution(imgPhoto.HorizontalResolution,
imgPhoto.VerticalResolution);
Graphics grPhoto = Graphics.FromImage(bmPhoto);
grPhoto.Clear(Color.Black);
grPhoto.InterpolationMode =
System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
grPhoto.DrawImage(imgPhoto,
new Rectangle(destX, destY, destWidth, destHeight),
new Rectangle(sourceX, sourceY, sourceWidth, sourceHeight),
GraphicsUnit.Pixel);
grPhoto.Dispose();
imgPhoto.Dispose();
return bmPhoto;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/58542855
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