-写霸-Android 实现字体识别（二）

来源：互联网发布：外贸软件知乎编辑：程序博客网时间：2024/06/05 07:41

上次简单说了一下字体识别的分析这篇咱们就来一点一点探求一下这个的实现吧

这个字体识别软件会用到 SQLite 以及简单的 Android绘图

首先我们需要建立一个模板就是汉字笔画的模板这个模板就需要用到SQLite了

关键代码如下

@Overridepublic boolean onTouchEvent(MotionEvent event) {// Log.e("Draw", "onTouchEvent");float x = event.getX();float y = event.getY();switch (event.getAction()) {case MotionEvent.ACTION_DOWN:chardata = new ArrayList<CharData>();Log.v("Draw", "startx=" + x + "    y=" + y);path.moveTo(x, y);currentPreX = x;currentPreY = y;lastPreX = x;lastPreY = y;currentX = (int) (x / (Width / GridNum)) + 1;currentY = (int) (y / (Width / GridNum)) + 1;String grid = "(" + currentX + "," + currentY + ")";System.out.println(grid);gridList.add(grid);addData(x, y);System.out.println("起点坐标" + x + "," + y);break;case MotionEvent.ACTION_MOVE:Log.v("Draw", "x=" + x + "    y=" + y);path.quadTo(currentPreX, currentPreY, x, y);lastX = (int) (lastPreX / (Width / GridNum)) + 1;lastY = (int) (lastPreY / (Width / GridNum)) + 1;currentX = (int) (x / (Width / GridNum)) + 1;currentY = (int) (y / (Width / GridNum)) + 1;String grids = "(" + currentX + "," + currentY + ")";// 如果换格子了 就进入if (listDataQuery(grids)) {gridList.add(grids);charCUP(x, y);}currentPreX = x;currentPreY = y;break;case MotionEvent.ACTION_UP:Log.v("Draw", "endx=" + x + "    y=" + y);System.out.println("终点坐标" + x + "," + y);addData(x, y);Datas.add(chardata);/*** 计算度数 计算笔顺 去除杂点 计算大小*/// JSAngle();cacheCanvas.drawPath(path, paints);path.reset();// chardata.clear();// initCanvas();for (int i = 0; i < Datas.size(); i++) {System.out.println("第" + i + "笔" + Datas.get(i).size());}break;}invalidate();return true;}/*** 计算笔顺*/void JSStrokeNum() {int num = 0;chardata.get(0).setIndex(0);float oneAngle, twoAngle;for (int i = 1; i < chardata.size(); i++) {oneAngle = chardata.get(i).getAngle();if (i + 1 < chardata.size()) {twoAngle = chardata.get(i + 1).getAngle();if (Math.abs(oneAngle - twoAngle) > 180) {num = StrokeNumJiSuan(i, num, oneAngle, twoAngle, 0);} else {num = StrokeNumJiSuan(i, num, oneAngle, twoAngle, 1);}}}}/*** 计算笔顺方法* * @param i* @param num* @param oneAngle* @param twoAngle* @param type*/int StrokeNumJiSuan(int i, int num, float oneAngle, float twoAngle, int type) {float angles = 0;if (type == 0) {angles = 180 - (360 - Math.abs(oneAngle - twoAngle));} else {angles = Math.abs(oneAngle - twoAngle);}if (angles > 36) {num++;chardata.get(i + 1).setIndex(num);} else {if (i + 2 < chardata.size()) {twoAngle = chardata.get(i + 2).getAngle();if (Math.abs(oneAngle - twoAngle) > 180) {float angless = 180 - (360 - Math.abs(oneAngle - twoAngle));if (angless > 36) {System.out.println(oneAngle + "****" + twoAngle);num++;chardata.get(i + 1).setIndex(num);} else {chardata.get(i + 1).setIndex(num);}} else {if (Math.abs(oneAngle - twoAngle) > 36) {System.out.println(oneAngle + "****" + twoAngle);num++;chardata.get(i + 1).setIndex(num);} else {chardata.get(i + 1).setIndex(num);}}} else {chardata.get(i + 1).setIndex(num);}}return num;}/*** 顺序写入点* * @param x* @param y*/void addData(float x, float y) {CharData data = new CharData();data.setPointX(x);data.setPointY(y);data.setAngle(0);data.setIndex(0);chardata.add(data);}/*** 根据位置写入点* * @param x* @param y*/void addData(int wz, float x, float y) {CharData data = new CharData();data.setPointX(x);data.setPointY(y);data.setAngle(0);data.setIndex(0);chardata.add(wz, data);}

以上就是笔画模板的核心代码给大家说明一下

首先我们要获取用户输入的点坐标通过记录用户手指走过的路径来得到用户输入的这一笔的坐标我们存到一个集合里面

然后我们需要对这个集合里面的坐标进行去除没有用的坐标点然后增加标记点记录用户在一笔里面是否有一些拐弯啦什么最后通过算法优化等来得到一个笔画的模板然后把它存到我们相应的模板库中有什么不明白的地方欢迎大家在评论里面提问

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