图片旋转之后为何会产生锯齿(45度的倍数就不会),如何解决? 在使用.NET中,图片放大缩小移动都不会产生锯齿,而旋转之后就会了产生锯齿(旋转45度的的倍数就不会),不知道为什么,有什么方法可以解决吗? 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 不会啊,我没看到锯齿啊代码如下:using System;using System.Drawing;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Data;namespace Image{ /// <summary> /// Form1 的摘要说明。 /// </summary> public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.Button button1; private System.Windows.Forms.OpenFileDialog openFileDialog1; /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.Container components = null; private System.Windows.Forms.Button button2; private System.Windows.Forms.Button button3; private System.Windows.Forms.Button button4; private System.Windows.Forms.Button button5; private System.String StrFileName=""; private System.Int32 iFlag=1; public Form1() { // // Windows 窗体设计器支持所必需的 // InitializeComponent(); // // TODO: 在 InitializeComponent 调用后添加任何构造函数代码 // } /// <summary> /// 清理所有正在使用的资源。 /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows 窗体设计器生成的代码 /// <summary> /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 /// </summary> private void InitializeComponent() { this.button1 = new System.Windows.Forms.Button(); this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog(); this.button2 = new System.Windows.Forms.Button(); this.button3 = new System.Windows.Forms.Button(); this.button4 = new System.Windows.Forms.Button(); this.button5 = new System.Windows.Forms.Button(); this.SuspendLayout(); // // button1 // this.button1.Location = new System.Drawing.Point(8, 208); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size(80, 23); this.button1.TabIndex = 0; this.button1.Text = "浏览图像"; this.button1.Click += new System.EventHandler(this.button1_Click); // // openFileDialog1 // this.openFileDialog1.Filter = "Image files (JPeg, Gif, Bmp, etc.)|*.jpg;*.jpeg;*.gif;*.bmp;*.tif; *.tiff; *.png|" + " JPeg files (*.jpg;*.jpeg)|*.jpg;*.jpeg |GIF files (*.gif)|*.gif |BMP files (*.b" + "mp)|*.bmp|Tiff files (*.tif;*.tiff)|*.tif;*.tiff|Png files (*.png)| *.png |All f" + "iles (*.*)|*.*"; // // button2 // this.button2.FlatStyle = System.Windows.Forms.FlatStyle.Popup; this.button2.Location = new System.Drawing.Point(8, 8); this.button2.Name = "button2"; this.button2.Size = new System.Drawing.Size(320, 192); this.button2.TabIndex = 1; this.button2.Paint += new System.Windows.Forms.PaintEventHandler(this.button2_Paint); // // button3 // this.button3.Location = new System.Drawing.Point(88, 208); this.button3.Name = "button3"; this.button3.Size = new System.Drawing.Size(80, 23); this.button3.TabIndex = 2; this.button3.Text = "正常显示"; this.button3.Click += new System.EventHandler(this.button3_Click); // // button4 // this.button4.Location = new System.Drawing.Point(168, 208); this.button4.Name = "button4"; this.button4.Size = new System.Drawing.Size(80, 23); this.button4.TabIndex = 3; this.button4.Text = "旋转18度"; this.button4.Click += new System.EventHandler(this.button4_Click); // // button5 // this.button5.Location = new System.Drawing.Point(248, 208); this.button5.Name = "button5"; this.button5.Size = new System.Drawing.Size(80, 23); this.button5.TabIndex = 4; this.button5.Text = "旋转26度"; this.button5.Click += new System.EventHandler(this.button5_Click); // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.ClientSize = new System.Drawing.Size(336, 238); this.Controls.Add(this.button5); this.Controls.Add(this.button4); this.Controls.Add(this.button3); this.Controls.Add(this.button2); this.Controls.Add(this.button1); this.MaximizeBox = false; this.Name = "Form1"; this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen; this.Text = "演示以任意角度旋转显示图像"; this.ResumeLayout(false); } #endregion /// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { Application.Run(new Form1()); } private void button1_Click(object sender, System.EventArgs e) {//浏览图像 this.openFileDialog1.ShowDialog(); this.StrFileName=this.openFileDialog1.FileName; this.button2.Refresh(); } private void button2_Paint(object sender, System.Windows.Forms.PaintEventArgs e) {//以任意角度旋转显示图像 if(this.StrFileName.Trim()=="") return; System.Drawing.Bitmap MyBitmap=new Bitmap(this.StrFileName); Graphics g = e.Graphics; TextureBrush MyBrush = new TextureBrush(MyBitmap); switch(this.iFlag) { case 1: MyBrush.RotateTransform(0.0f); //正常显示图像 break; case 2: MyBrush.RotateTransform(18.0f); //顺时针旋转18度显示图像 break; case 3: MyBrush.RotateTransform(26.0f); //顺时针旋转26度显示图像 break; }/* switch(this.iFlag) { case 1: g.RotateTransform(0.0f); //正常显示图像 break; case 2: g.RotateTransform(18.0f); //顺时针旋转18度显示图像 break; case 3: g.RotateTransform(26.0f); //顺时针旋转26度显示图像 break; }*/ g.FillRectangle(MyBrush,0,0,this.ClientRectangle.Width,this.ClientRectangle.Height); } private void button3_Click(object sender, System.EventArgs e) {//正常显示图像 this.iFlag=1; this.button2.Refresh(); } private void button4_Click(object sender, System.EventArgs e) {//顺时针旋转18度显示图像 this.iFlag=2; this.button2.Refresh(); } private void button5_Click(object sender, System.EventArgs e) {//顺时针旋转26度显示图像 this.iFlag=3; this.button2.Refresh(); } }} 能不能不用GDI+(用Graphics类画图),因为我有很多方面的操作,用Graphics比较麻烦。我用的是取每个点的坐标进行计算的(即GetPixel,SetPixel两个函数来计算每个点的)。但用每个点来计算就出现锯齿的问题了。 你还是用Graphics中旋转坐标来处理。 不能用Graphics啊Graphics只能做一些规则的一些变化(放大缩小,旋转,移动),我是要除了这几种规则变化之外还有一些按三角函数变化的,而且几种变化是结合在一起的(如旋转30度之后再波浪变化)有什么好的算法吗,各位兄弟姐妹? 数据库求助 C# 二进制文件读写,难道没高手了吗??? socket keep alive问题 线程怎么用? RICHTEXTBOX 字体背景颜色问题(有代码,可看不懂) 如何向数据源中同时更新多条数据??? 腾讯的面试,很基本,但是4年经验的我却不会,.NET WINFROM 的题目,受挫折想转行,大家会吗?会的话请告诉我。。。。。 问一个非常简单的问题 求大神帮个忙,商品入库,对于重复的商品要更新库存,新入的则添加库存数。 各位大侠可以帮我看看怎样修改这个 download的例子吗? 在WIN2003环境下水晶报表加载失败是什么问题? 告急!!!!!!!高手进!!!在线等!!!!!
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;namespace Image
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
private System.Windows.Forms.OpenFileDialog openFileDialog1;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Button button3;
private System.Windows.Forms.Button button4;
private System.Windows.Forms.Button button5;
private System.String StrFileName="";
private System.Int32 iFlag=1;
public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent(); //
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
} /// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
} #region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.button4 = new System.Windows.Forms.Button();
this.button5 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(8, 208);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(80, 23);
this.button1.TabIndex = 0;
this.button1.Text = "浏览图像";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// openFileDialog1
//
this.openFileDialog1.Filter = "Image files (JPeg, Gif, Bmp, etc.)|*.jpg;*.jpeg;*.gif;*.bmp;*.tif; *.tiff; *.png|" +
" JPeg files (*.jpg;*.jpeg)|*.jpg;*.jpeg |GIF files (*.gif)|*.gif |BMP files (*.b" +
"mp)|*.bmp|Tiff files (*.tif;*.tiff)|*.tif;*.tiff|Png files (*.png)| *.png |All f" +
"iles (*.*)|*.*";
//
// button2
//
this.button2.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
this.button2.Location = new System.Drawing.Point(8, 8);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(320, 192);
this.button2.TabIndex = 1;
this.button2.Paint += new System.Windows.Forms.PaintEventHandler(this.button2_Paint);
//
// button3
//
this.button3.Location = new System.Drawing.Point(88, 208);
this.button3.Name = "button3";
this.button3.Size = new System.Drawing.Size(80, 23);
this.button3.TabIndex = 2;
this.button3.Text = "正常显示";
this.button3.Click += new System.EventHandler(this.button3_Click);
//
// button4
//
this.button4.Location = new System.Drawing.Point(168, 208);
this.button4.Name = "button4";
this.button4.Size = new System.Drawing.Size(80, 23);
this.button4.TabIndex = 3;
this.button4.Text = "旋转18度";
this.button4.Click += new System.EventHandler(this.button4_Click);
//
// button5
//
this.button5.Location = new System.Drawing.Point(248, 208);
this.button5.Name = "button5";
this.button5.Size = new System.Drawing.Size(80, 23);
this.button5.TabIndex = 4;
this.button5.Text = "旋转26度";
this.button5.Click += new System.EventHandler(this.button5_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(336, 238);
this.Controls.Add(this.button5);
this.Controls.Add(this.button4);
this.Controls.Add(this.button3);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.MaximizeBox = false;
this.Name = "Form1";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "演示以任意角度旋转显示图像";
this.ResumeLayout(false); }
#endregion /// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void button1_Click(object sender, System.EventArgs e)
{//浏览图像
this.openFileDialog1.ShowDialog();
this.StrFileName=this.openFileDialog1.FileName;
this.button2.Refresh();
}
private void button2_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{//以任意角度旋转显示图像
if(this.StrFileName.Trim()=="")
return;
System.Drawing.Bitmap MyBitmap=new Bitmap(this.StrFileName);
Graphics g = e.Graphics;
TextureBrush MyBrush = new TextureBrush(MyBitmap);
switch(this.iFlag)
{
case 1:
MyBrush.RotateTransform(0.0f); //正常显示图像
break;
case 2:
MyBrush.RotateTransform(18.0f); //顺时针旋转18度显示图像
break;
case 3:
MyBrush.RotateTransform(26.0f); //顺时针旋转26度显示图像
break;
}
/*
switch(this.iFlag)
{
case 1:
g.RotateTransform(0.0f); //正常显示图像
break;
case 2:
g.RotateTransform(18.0f); //顺时针旋转18度显示图像
break;
case 3:
g.RotateTransform(26.0f); //顺时针旋转26度显示图像
break;
}
*/
g.FillRectangle(MyBrush,0,0,this.ClientRectangle.Width,this.ClientRectangle.Height);
}
private void button3_Click(object sender, System.EventArgs e)
{//正常显示图像
this.iFlag=1;
this.button2.Refresh();
}
private void button4_Click(object sender, System.EventArgs e)
{//顺时针旋转18度显示图像
this.iFlag=2;
this.button2.Refresh();
}
private void button5_Click(object sender, System.EventArgs e)
{//顺时针旋转26度显示图像
this.iFlag=3;
this.button2.Refresh();
}
}
}
我用的是取每个点的坐标进行计算的(即GetPixel,SetPixel两个函数来计算每个点的)。
但用每个点来计算就出现锯齿的问题了。
Graphics只能做一些规则的一些变化(放大缩小,旋转,移动),我是要除了这几种规则变化之外还有一些按三角函数变化的,而且几种变化是结合在一起的(如旋转30度之后再波浪变化)有什么好的算法吗,各位兄弟姐妹?