介绍 java可以用来干什么 /* *
,,*,图像旋转
,,*,@param src
,,*,@param 天使
,,* @return
*/public 才能;static BufferedImage 旋转(Image src, double 天使),{
,,,int src_width =, src.getWidth(空);
,,,int src_height =, src.getHeight(空);
,,,//,calculate 从而new image 大小
,,,Rectangle rect_des =, CalcRotatedSize (new 矩形(new 维度(
,,,,,,,,,src_width src_height),天使);
,
,,,BufferedImage res =,空;
,,,res =, new BufferedImage (rect_des.width, rect_des.height,
,,,,,,,BufferedImage.TYPE_3BYTE_BGR);
,,,Graphics2D g2 =, res.createGraphics ();
,,,//变换
,,,g2.translate ((rect_des.width 作用;src_width),/, 2,
,,,,,,,(rect_des.height 作用;src_height),/, 2);
,,,g2.rotate (Math.toRadians(天使),src_width /, 2, src_height /, 2);
,
,,,g2.drawImage (src, null,, null);
,,,return res;
,,}
,
public 才能static Rectangle CalcRotatedSize (Rectangle src, double 天使),{
,,,//,if angel is greater than 90年,学位,,need 用我方表示歉意do some 转换
,,,if (angel 祝辞=,90),{
,,,,,如果(angel /, 90, %, 2,==, 1) {
,,,,,,,int temp =, src.height;
,,,,,,,src.height =, src.width;
,,,,,,,src.width =,温度;
,,,,,}
,,,,,angel =, angel %, 90;
,,,}
,
,,,double r =, Math.sqrt (src.height *, src.height +, src.width *, src.width),/, 2;
,,,double len =, 2, *, sin (Math.toRadians(天使),/,2),*,r;
,,,double angel_alpha =, (Math.PI 安康;Math.toRadians(天使),/,2;
,,,double angel_dalta_width =, Math.atan((双),src.height /, src.width);
,,,double angel_dalta_height =, Math.atan((双),src.width /, src.height);
,
,,,int len_dalta_width =, (int), (len *, Math.cos (Math.PI 作用;angel_alpha
,,,,,,,今天早上,angel_dalta_width));
,,,len_dalta_width=len_dalta_width> 0 ? len_dalta_width: -len_dalta_width;
,
,,,int len_dalta_height =, (int), (len *, Math.cos (Math.PI 作用;angel_alpha
,,,,,,,今天早上,angel_dalta_height));
,,,len_dalta_height=len_dalta_height> 0 ? len_dalta_height: -len_dalta_height;
,
,,,int des_width =, src.width +, len_dalta_width *, 2;
,,,int des_height =, src.height +, len_dalta_height *, 2;
,,,des_width=des_width> 0 ? des_width: -des_width;
,,,des_height=des_height> 0 ? des_height: -des_height;
,,,return new java.awt.Rectangle (new 维度(des_width, des_height));
} ,/* *
,,*,opencv实现图片旋转
,,*,@param splitImage
,,*,@param 角
,,* @return
*/public 才能static Mat rotate3 (Mat splitImage, double 角)
{才能
,,,double thera =, angle *, Math.PI /, 180;
,,,double a =, sin(席拉);
,,,double b =, Math.cos(席拉);
,
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这篇文章给大家介绍使用java怎么对图片的角度进行旋转,内容非常详细,感兴趣的小伙伴们可以参考借鉴,希望对大家能有所帮助。
java主要应用于:1。网页开发;2。Android开发;3。客户端开发;4。网页开发;5。企业级应用开发;6。Java大数据开发;7。游戏开发等。
<强>方法一:普通方法实现图片旋转
<>强方法二:opencv实现图片旋转
