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优化图片旋转的问题

This commit is contained in:
强 杨 2023-10-16 16:06:28 +08:00
parent efd32688fc
commit b0700e195b
4 changed files with 44 additions and 7 deletions
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1
App_Code/CommonUse.cs
View File

@ -1499,7 +1499,6 @@ public class CommonUse
break;
}
}
return bitmap;
}

44
Temp/Default.aspx.cs
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@ -314,9 +314,8 @@ public partial class 外部答题卡_Default : System.Web.UI.Page
Response.Write("NO DATA");
return false;
}
Bitmap PictureBoxBitMap = ImgGet(dt.Rows[0]["TempPicture64_nvarchar"].ToString());
Bitmap PictureBoxBitMap = UrlToImage(dt.Rows[0]["TempPicture64_nvarchar"].ToString());
//var PictureBoxBitMap = commonUse.RotateByOrientation(tempPictureBoxBitMap);
if (PictureBoxBitMap == null)
{
Response.Write("NO PICTURE");
@ -337,7 +336,7 @@ public partial class 外部答题卡_Default : System.Web.UI.Page
Image<Bgr, byte> myImage = new Image<Bgr, byte>(PictureBoxBitMap);
// 进行中值滤波
CvInvoke.MedianBlur(myImage, myImage, 13);
CvInvoke.MedianBlur(myImage, myImage, 11);
// 进行高斯滤波
CvInvoke.GaussianBlur(myImage, myImage, new Size(0, 0), 3);
@ -352,7 +351,7 @@ public partial class 外部答题卡_Default : System.Web.UI.Page
VectorOfVectorOfPoint selected_contours1 = commonUse.GetUsefulContoursDingWei(mat_dilate, 1);
//var color_mat1 = commonUse.DrawContours(mat_dilate, selected_contours1);
//commonUse.ShowMatWaitKey("44444", color_mat1, 0.6);
//commonUse.ShowMatWaitKey("44444", color_mat1, 0.8);
//Response.Write(ImgToBase64String(color_mat1.Bitmap));
//return false;
@ -1098,6 +1097,43 @@ public partial class 外部答题卡_Default : System.Web.UI.Page
}
}
public static Bitmap UrlToImage(string url)
{
WebRequest imgRequest = WebRequest.Create(url);
HttpWebResponse res = null;
try
{
res = (HttpWebResponse)imgRequest.GetResponse();
imgRequest.Timeout = 50000;
if (res.StatusCode.ToString() == "OK")
{
var tempbitmap = new Bitmap(imgRequest.GetResponse().GetResponseStream());
// 别删！图片和网页中的方向不一致，根据图片中的方向信息，旋转图片后识别
return new CommonUse().RotateByOrientation(tempbitmap);
}
else
{
return null;
}
}
catch (WebException ex)
{
res = (HttpWebResponse)ex.Response;
return null;
}
finally
{
if (res != null)
{
res.Dispose();
res.Close();
}
imgRequest.Abort();
}
}
}

3
Temp/TempDraw.aspx.cs
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@ -287,7 +287,8 @@ public partial class Temp_TempDraw : System.Web.UI.Page
imgRequest.Timeout = 50000;
if (res.StatusCode.ToString() == "OK")
{
return new Bitmap(imgRequest.GetResponse().GetResponseStream());
var tempbitmap = new Bitmap(imgRequest.GetResponse().GetResponseStream());
return new CommonUse().RotateByOrientation(tempbitmap);
}
else
{

3
Temp/UserTemp.aspx.cs
View File

@ -149,7 +149,8 @@ public partial class Temp_UserTemp : System.Web.UI.Page
Response.Write("NODATA");
return;
}
Bitmap PictureBoxBitMap = ImgGet(dt.Rows[0]["TempPicture64_nvarchar"].ToString());
Bitmap temp = ImgGet(dt.Rows[0]["TempPicture64_nvarchar"].ToString());
var PictureBoxBitMap = new CommonUse().RotateByOrientation(temp);
if (PictureBoxBitMap == null)
{
Response.Write("NOPICTURE");