C#实现手机拍照并且保存水印照片

图像采集需要调用摄像头就行拍照操作，网上查了一下资料，需要引用以下3个dll。

看一下运行界面

界面都比较low，主要是功能实现。

private void camera_load(object sender, eventargs e)
{
this.btnsave.enabled = false;
try
{
bordersize = getbordersize(this);
captionheight = getcaptionheight(this);
//initstudent("", "", "");
this.combobox_sizemode.text = "填充(保持比例)";
filterinfocollection infos = new filterinfocollection(filtercategory.videoinputdevice);
if ((infos != null) && (infos.count > 0))
{
}
else
{
messagebox.show("没有视频设备");
}
this.loadvedio();
this.splitcontainer1.panel2minsize = 280;
this.splitcontainer1.splitterdistance = this.splitcontainer1.width - this.splitcontainer1.panel2minsize + 1;
mf = new borderform();
mf.show(this);
//mf.left = (this.left + this.splitcontainer1.panel1.width - mf.width) / 2;
//mf.top = (this.top + this.splitcontainer1.panel1.height - mf.height) / 2;
//marleft = mf.left - this.left;
//martop = mf.top - this.top;
rectangle rtpic = this.picturebox_camera.rectangletoscreen(this.picturebox_camera.clientrectangle);
rectangle rtmf = this.mf.rectangletoscreen(this.mf.clientrectangle);
if (rtpic == null || rtmf == null || rtpic.width == 0 || rtmf.width == 0)
{
return;
}
mf.left = ((rtmf.width + rtmf.left) + (rtpic.width + rtpic.left)) / 2;
mf.top = ((rtmf.height + rtmf.top) + (rtpic.height + rtpic.top)) / 2;
mf.sizechanged += new eventhandler(mf_sizechanged);
mf.locationchanged += new eventhandler(mf_locationchanged);
picturebox_camera_sizechanged(sender, e);
//启动连拍
//this.shootonetime = 0;
this.timer1.start();
}
catch (exception ex)
{
messagebox.show(ex.message, "错误", messageboxbuttons.ok, messageboxicon.error);
}
}

//加载摄像头设备
private void loadvedio()
{
filterinfocollection infos = new filterinfocollection(filtercategory.videoinputdevice);
if ((infos != null) && (infos.count > 0))
{
int index = 0;
foreach (filterinfo info in infos)
{
this.cmbcapturedevice.items.add(new deviceinfo(info.name, info.monikerstring, index, filtercategory.videoinputdevice));
index++;
}
this.cmbcapturedevice.selectedindex = 0;
}
}

/// <summary>
/// 拍照
/// </summary>
private void shoot()
{
try
{
if (this.picturebox_camera.image != null && (int)this.numericupdown1.value > 0 && (int)this.numericupdown2.value > 0)
{
bitmap resultimage = new bitmap((int)this.numericupdown1.value, (int)this.numericupdown2.value);
graphics g = graphics.fromimage(resultimage);
g.copyfromscreen(new point(this.mf.location.x + 1, this.mf.location.y + 1), new point(6, 6 + (iswin7 ? 2 : 0)), new size(resultimage.size.width, resultimage.size.height - (6 + (iswin7 ? 2 : 0))));
if (!string.isnullorempty(xh))
{
string str = "";
if (this.xh != "")
{
str = this.xh;
}
else if (this.sfzh != "")
{
str = this.sfzh;
}
else if (this.ksh != "")
{
str = this.ksh;
}
if (this.checkbox2.checked)
{
str = xm + " " + str;
}
int txtwidth = (int)(g.measurestring(str, new font("宋体", 9)).width * 1.1);
rectangle rec = new rectangle((resultimage.width - txtwidth) / 2, resultimage.height - 16, txtwidth, 15);
g.fillrectangle(brushes.white, rec);
stringformat sf = new stringformat();
sf.linealignment = stringalignment.center;
sf.alignment = stringalignment.center;
rec.height++;
g.drawstring(str, new font("宋体", 9), brushes.black, rec, sf);
}
this.picturebox_tx.image = resultimage;
}
else
{
this.picturebox_tx.image = null;
}
}
catch (exception ex)
{
messagebox.show(ex.message, "", messageboxbuttons.ok, messageboxicon.error);
}
}

//选择摄像装置
private void cmbcapturedevice_selectedindexchanged(object sender, eventargs e)
{
if (this.cmbcapturedevice.selecteditem != null)
{
this.cmbdevicecapability.items.clear();
videocapturedevice device = new videocapturedevice(((deviceinfo)this.cmbcapturedevice.selecteditem).monikerstring);
for (int i = 0; i < device.videocapabilities.length; i++)
{
videocapabilities capabilities = device.videocapabilities[i];
devicecapabilityinfo item = new devicecapabilityinfo(capabilities.framesize);
this.cmbdevicecapability.items.add(item);
}
deviceinfo selecteditem = (deviceinfo)this.cmbcapturedevice.selecteditem;
if (this.captureaforge != null)
{
this.captureaforge.newframe -= new newframeeventhandler(this.captureaforge_newframe);
//this.captureaforge.snapshotframe -= new newframeeventhandler(this.captureaforge_snapshotframe);
if (this.captureaforge.isrunning)
{
this.captureaforge.signaltostop();
}
this.captureaforge.waitforstop();
this.captureaforge = null;
}
this.captureaforge = new videocapturedevice(selecteditem.monikerstring);
this.captureaforge.providesnapshots = true;
this.captureaforge.newframe += new newframeeventhandler(this.captureaforge_newframe);
//this.captureaforge.snapshotframe += new newframeeventhandler(this.captureaforge_snapshotframe);
if (this.cmbdevicecapability.items.count > 0)
{
this.cmbdevicecapability.selectedindex = 0;
}
}
}

//选择分辨率
private void cmbdevicecapability_selectedindexchanged(object sender, eventargs e)
{
string[] strarray = this.cmbdevicecapability.text.trim().split(new char[] { 'x' });
int width = int.parse(strarray[0]);
int height = int.parse(strarray[1]);
if (this.captureaforge != null)
{
if (this.captureaforge.isrunning)
{
this.captureaforge.signaltostop();
}
this.captureaforge.waitforstop();
this.captureaforge.desiredframesize = new size(width, height);
this.captureaforge.desiredsnapshotsize = new size(width, height);
//this.captureaforge.desiredframerate = 1000;
this.captureaforge.start();
}
}

//设置数据源大小 
private void combobox_sizemode_selectedindexchanged(object sender, eventargs e)
{
switch (this.combobox_sizemode.text)
{
case "默认(原始大小)":
this.picturebox_camera.sizemode = pictureboxsizemode.normal;
break;
case "居中(原始大小)":
this.picturebox_camera.sizemode = pictureboxsizemode.centerimage;
break;
case "填充(拉伸图像)":
this.picturebox_camera.sizemode = pictureboxsizemode.stretchimage;
break;
case "填充(保持比例)":
this.picturebox_camera.sizemode = pictureboxsizemode.zoom;
break;
}
}

//保存照片
private void buttonsave_click(object sender, eventargs e)
{
try
{
string filename = path.combine(application.startuppath, "stuimages", "newstuimages", this.xh + ".jpg");
if (!this.checkbox1.checked && file.exists(filename))
{
if (messagebox.show("该生已经有照片文件，是否覆盖? ", "", messageboxbuttons.okcancel, messageboxicon.warning) == dialogresult.ok)
{
//存储到本地
this.picturebox_tx.image.save(filename);
//ondatachanged(this, new dataeventargs(string.format("头像采集(覆盖)，学号：{0}，姓名：{1}，考生号：{2}，身份证号：{3}", this.xh, this.xm, this.ksh, this.sfzh)));
this.txtksh.focus();
this.txtksh.selectall();
}
else
{
return;
}
}
else
{
this.picturebox_tx.image.save(filename);
//ondatachanged(this, new dataeventargs(string.format("头像采集，学号：{0}，姓名：{1}，考生号：{2}，身份证号：{3}", this.xh, this.xm, this.ksh, this.sfzh)));
this.txtksh.focus();
this.txtksh.selectall();
}
this.timer1.start();
}
catch
{
}
finally
{
//启用下面一行,点击保存后头像会立即启动刷新
//this.timer1.start();
this.btnsave.enabled = false;
}
}

保存照片可以选择自动覆盖同名照片或者在照片中加入水印效果。

操作时候可以自行拖动长方形的框进行选择拍照

以上所述是小编给大家介绍的c#实现手机拍照并且保存水印照片，希望对大家有所帮助