Java 如何使用opencv4android提供流体效果/调整位图wrt触摸事件的大小
我是OpenCV4Android和Android NDK的新手 努力实现 根据图像上的触摸点拉伸图像。(将头发放在脸上,并使用“虚拟转换应用程序”等触摸事件相应地拉伸它) 问题:使用Java时 通过从位图中获取矩阵并在触摸事件中重新计算,实现了触摸事件的扭曲功能。但是图像会失真,整个矩阵会颠倒 如何使用OpenCV4Android实现这样的目标 尝试从位图获取Mat并调整图像大小。但我不知道我将如何进一步处理这些? 关于这些问题的任何启示都将非常有用Java 如何使用opencv4android提供流体效果/调整位图wrt触摸事件的大小,java,android,image-processing,opencv4android,Java,Android,Image Processing,Opencv4android,我是OpenCV4Android和Android NDK的新手 努力实现 根据图像上的触摸点拉伸图像。(将头发放在脸上,并使用“虚拟转换应用程序”等触摸事件相应地拉伸它) 问题:使用Java时 通过从位图中获取矩阵并在触摸事件中重新计算,实现了触摸事件的扭曲功能。但是图像会失真,整个矩阵会颠倒 如何使用OpenCV4Android实现这样的目标 尝试从位图获取Mat并调整图像大小。但我不知道我将如何进一步处理这些? 关于这些问题的任何启示都将非常有用 在浏览了大量图像处理库之后,每一个库都有扭曲
在浏览了大量图像处理库之后,每一个库都有扭曲和变形效果,但没有一个对接触点有影响。正如许多人建议的那样,你可以使用OpenCV4Android或OpenGL实现这些功能,但没有一个是我喜欢的 因此,最终在C中用NDK实现了翘曲效应 下面是应用于触摸点位图像素的算法
#include <stdio.h>
#include <stdlib.h>
#include <jni.h>
#include <math.h>
#include <malloc.h>
#include <android/log.h>
#define LOG_TAG "System.out"
#define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, __VA_ARGS__)
#define LOGI(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)
int *colorRed;
int *colorGreen;
int *colorBlue;
int *colorsP; //ÏñËØÖµ
int *colorAlpha;
int _width, _height;
jintArray imagecolors;
//²éÕÒ±í
static long SinXDivX_Table_8[(2 << 8) + 1];
double MySin(double x) {
double absx;
absx = x;
if (x < 0)
absx = -x;
#包括
#包括
#包括
#包括
#包括
#包括
#定义日志标签“System.out”
#定义LOGD(…)\uuuuuAndroid\uLog\uPrint(android\uLog\uDebug、log\uTag、\uuuu VA\uArgs\uuuuu)
#定义LOGI(…)\uuuuuAndroid\uLog\uPrint(android\uLog\uInfo、log\uTag、VA\uArgs\uuuu)
int*彩色;
绿色;
int*彩色蓝色;
int*colorsP//ÏñËØÖµ
int*colorAlpha;
内宽,内高;
金塔瑞图像颜色;
//²éÕÒ±í
静态长SinXDivX_表_8[(2标度2?标度1:标度2;
int xoffset=(viewwidt-(int)(宽度/比例))/2;
int yoffset=(视图高度-(int)(高度/比例))/2;
目标设置(xoffset,yoffset,(int)(宽度/比例)+xoffset,
(int)(高度/刻度)+yoffset);//=新的RectF(xoffset,
//约夫特(整数)
//(宽度/比例)+X偏移,
//(国际)
//(高度/刻度)+偏移量);
//萨维卡普酒店
canvas.drawColor(0x000000);
canvas.concat(mMatrix);
//画布。drawColor(颜色。透明);
//canvas.drawColor(Color.TRANSPARENT,PorterDuff.Mode.CLEAR);
//维卡普酒店
drawBitmap(mBmp、null、dest、mPaint);
}否则{
//萨维卡普酒店
canvas.drawColor(0x000000);
canvas.concat(mMatrix);
//画布。drawColor(颜色。透明);
//canvas.drawColor(Color.TRANSPARENT,PorterDuff.Mode.CLEAR);
//维卡普酒店
drawBitmap(newBmp、null、dest、mPaint);
}
}
私人双原点x,原点y;
私人双备忘录dx,备忘录dy;
私人双最大区,最大区面积;
私有整数宽度;
私人内部高度;
私有整数计数=0;
私人双mou_dx_规范;
私人双谅解备忘录规范;
私人浮动比例;
私有RectF dest;
私人双移动x,移动y;
private int dist=(int)getResources().getDimension(R.dimen.max_dist);
private int line_height=(int)getResources().getDimension(
R.dimen.翘曲线);
@凌驾
公共布尔onTouchEvent(运动事件){
//萨维卡普酒店
mscalepostation.onTouchEvent(事件);
mGestures.onTouchEvent(事件);
//维卡普酒店
开关(event.getAction()){
case MotionEvent.ACTION\u DOWN:
orig_x=event.getX();
orig_y=event.getY();
原点x=(原点x-目标左侧)*刻度;
起始y=(起始y-目标顶部)*刻度;
打破
case MotionEvent.ACTION\u移动:
如果(!mIsMove){//SA VIKALP添加了行
max_dist=dist*scale;//Math.hypot(mou-dx,mou-dy);
if(event.getAction()!=1){
//int m=event.getHistorySize();
move_x=event.getX();
move_y=event.getY();
移动x=(移动x-目标左侧)*比例;
移动y=(移动y-目标顶部)*比例;
//如果(m>0){
//int i2=m+-1;
//orig_x=(event.getHistoricalX(i2)-dest.left)*比例;
//原始y=(event.getHistoricali(i2)-dest.top)*规模;
// }
if(move_x>=0&&move_y>=0){
warpPhotoFromC(图像、高度、宽度、最大距离、原点、,
开始,移动,移动);
第一++;
设置像素(图像,0,宽度,0,0,宽度,高度);
fg=假;
}
}
orig_x=move_x;
orig_y=move_y;
}
打破
case MotionEvent.ACTION\u UP:
打破
}
使无效();
返回true;
}
//萨维卡普酒店
//公共无效applyWarpUndo(位图bmp){
//设置位图(bmp);
//Log.i(标记“大小:”
//+mArrayListWarpViewUndo.size()
//+“最后尺寸:”
//+mArrayListWarpViewUndo.get(mArrayListWarpViewUndo.size()-1)
//.getSize()+1);
//
//对于(int i=0;i=0&&mArrayListWarpViewUndo.get(i).getMove_y()>=0){
//warpPhotoFromC(mArrayListWarpViewUndo.get(i).getImage(),
//mArrayListWarpViewUndo.get(i).getHeight(),
//MarrayListViewUndo
public class WarpView extends View {
static {
System.loadLibrary("Hello");
}
public native int[] warpPhotoFromC(int[] image, int height, int width,
double max_dist, double orig_x, double orig_y, double cur_x,
double cur_y);
private static String TAG = WarpView.class.getSimpleName();
private Bitmap mBmp;
private int[] image;
private int first = 0;
private int[] colorR;
private int[] colorG;
private int[] colorB;
private Bitmap newBmp;
private boolean fg = true;
private Context context;
private static final int DEFAULT_PAINT_FLAGS = Paint.FILTER_BITMAP_FLAG
| Paint.DITHER_FLAG;
static Paint mPaint = new Paint(DEFAULT_PAINT_FLAGS);
public static int HWPPQ = 110;
public static int MMQFJ = 120;
private int MODE = MMQFJ;
// SA VIKALP
// public ArrayList<WarpViewUndo> mArrayListWarpViewUndo;
static GestureDetector mGestures;
static ScaleGestureDetector mScaleGesture;
private Matrix mMatrix = new Matrix();
private Matrix mInverse = new Matrix();
private float lastFocusX;
private float lastFocusY;
private boolean mIsMove = false;
// EA VIKALP
public WarpView(Context context) {
super(context);
}
public WarpView(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
dest = new RectF(0, 0, 0, 0);
// SA VIKALP
// mArrayListWarpViewUndo = new ArrayList<WarpViewUndo>();
mScaleGesture = new ScaleGestureDetector(getContext(),
new ScaleListener());
mGestures = new GestureDetector(getContext(), new GestureListener());
mMatrix.setTranslate(5, 5);
mMatrix.invert(mInverse);
// EA VIKALP
}
@Override
protected void onDraw(Canvas canvas) {
// super.onDraw(canvas);
if (fg) {
int viewWidht = getWidth();
int viewHeight = getHeight();
float scale1 = (float) width / (float) viewWidht;
float scale2 = (float) height / (float) viewHeight;
scale = scale1 > scale2 ? scale1 : scale2;
int xoffset = (viewWidht - (int) (width / scale)) / 2;
int yoffset = (viewHeight - (int) (height / scale)) / 2;
dest.set(xoffset, yoffset, (int) (width / scale) + xoffset,
(int) (height / scale) + yoffset);// = new RectF(xoffset,
// yoffset, (int)
// (width/scale)+xoffset,
// (int)
// (height/scale)+yoffset);
// SA VIKALP
canvas.drawColor(0x000000);
canvas.concat(mMatrix);
// canvas.drawColor(Color.TRANSPARENT);
// canvas.drawColor(Color.TRANSPARENT, PorterDuff.Mode.CLEAR);
// EA VIKALP
canvas.drawBitmap(mBmp, null, dest, mPaint);
} else {
// SA VIKALP
canvas.drawColor(0x000000);
canvas.concat(mMatrix);
// canvas.drawColor(Color.TRANSPARENT);
// canvas.drawColor(Color.TRANSPARENT, PorterDuff.Mode.CLEAR);
// EA VIKALP
canvas.drawBitmap(newBmp, null, dest, mPaint);
}
}
private double orig_x, orig_y;
private double mou_dx, mou_dy;
private double max_dist, max_dist_sq;
private int width;
private int height;
private int count = 0;
private double mou_dx_norm;
private double mou_dy_norm;
private float scale;
private RectF dest;
private double move_x, move_y;
private int dist = (int) getResources().getDimension(R.dimen.max_dist);
private int line_height = (int) getResources().getDimension(
R.dimen.warp_line);
@Override
public boolean onTouchEvent(MotionEvent event) {
// SA VIKALP
mScaleGesture.onTouchEvent(event);
mGestures.onTouchEvent(event);
// EA VIKALP
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
orig_x = event.getX();
orig_y = event.getY();
orig_x = (orig_x - dest.left) * scale;
orig_y = (orig_y - dest.top) * scale;
break;
case MotionEvent.ACTION_MOVE:
if (!mIsMove) { // SA VIKALP ADDED LINE
max_dist = dist * scale;// Math.hypot(mou_dx, mou_dy);
if (event.getAction() != 1) {
// int m = event.getHistorySize();
move_x = event.getX();
move_y = event.getY();
move_x = (move_x - dest.left) * scale;
move_y = (move_y - dest.top) * scale;
// if(m > 0){
// int i2 = m + -1;
// orig_x = (event.getHistoricalX(i2) - dest.left)*scale;
// orig_y = (event.getHistoricalY(i2) - dest.top)*scale;
// }
if (move_x >= 0 && move_y >= 0) {
warpPhotoFromC(image, height, width, max_dist, orig_x,
orig_y, move_x, move_y);
first++;
newBmp.setPixels(image, 0, width, 0, 0, width, height);
fg = false;
}
}
orig_x = move_x;
orig_y = move_y;
}
break;
case MotionEvent.ACTION_UP:
break;
}
invalidate();
return true;
}
// SA VIKALP
// public void applyWarpUndo(Bitmap bmp) {
// setWarpBitmap(bmp);
// Log.i(TAG, "Size : "
// + mArrayListWarpViewUndo.size()
// + " last size :"
// + mArrayListWarpViewUndo.get(mArrayListWarpViewUndo.size() - 1)
// .getSize() + 1);
//
// for (int i = 0; i < mArrayListWarpViewUndo.size() - (mArrayListWarpViewUndo.get(mArrayListWarpViewUndo.size() - 1).getSize()+1); i++) {
// if (mArrayListWarpViewUndo.get(i).getMove_x() >= 0 && mArrayListWarpViewUndo.get(i).getMove_y() >= 0) {
// warpPhotoFromC(mArrayListWarpViewUndo.get(i).getImage(),
// mArrayListWarpViewUndo.get(i).getHeight(),
// mArrayListWarpViewUndo.get(i).getWidth(),
// mArrayListWarpViewUndo.get(i).getMax_dist(),
// mArrayListWarpViewUndo.get(i).getOrig_x(),
// mArrayListWarpViewUndo.get(i).getOrig_y(),
// mArrayListWarpViewUndo.get(i).getMove_x(),
// mArrayListWarpViewUndo.get(i).getMove_y());
//
// newBmp.setPixels(mArrayListWarpViewUndo.get(i).getImage(), 0,
// mArrayListWarpViewUndo.get(i).getWidth(), 0, 0,
// mArrayListWarpViewUndo.get(i).getWidth(),
// mArrayListWarpViewUndo.get(i).getHeight());
// fg = false;
// }
// }
//// Log.i(TAG, "Step Size "+mArrayListWarpViewUndo.size()-1);
// mArrayListWarpViewUndo.remove(mArrayListWarpViewUndo.size()-2);
// invalidate();
// }
public class ScaleListener implements OnScaleGestureListener {
@Override
public boolean onScale(ScaleGestureDetector detector) {
// TODO Auto-generated method stub
Matrix transformationMatrix = new Matrix();
float focusX = detector.getFocusX();
float focusY = detector.getFocusY();
// Zoom focus is where the fingers are centered,
transformationMatrix.postTranslate(-focusX, -focusY);
transformationMatrix.postScale(detector.getScaleFactor(),
detector.getScaleFactor());
/*
* Adding focus shift to allow for scrolling with two pointers down.
* Remove it to skip this functionality. This could be done in fewer
* lines, but for clarity I do it this way here
*/
// Edited after comment by chochim
float focusShiftX = focusX - lastFocusX;
float focusShiftY = focusY - lastFocusY;
transformationMatrix.postTranslate(focusX + focusShiftX, focusY
+ focusShiftY);
mMatrix.postConcat(transformationMatrix);
lastFocusX = focusX;
lastFocusY = focusY;
invalidate();
return true;
}
@Override
public boolean onScaleBegin(ScaleGestureDetector detector) {
// TODO Auto-generated method stub
lastFocusX = detector.getFocusX();
lastFocusY = detector.getFocusY();
return true;
}
@Override
public void onScaleEnd(ScaleGestureDetector detector) {
// TODO Auto-generated method stub
}
}
public class GestureListener implements OnGestureListener,
OnDoubleTapListener {
@Override
public boolean onDoubleTap(MotionEvent arg0) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean onDoubleTapEvent(MotionEvent arg0) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean onSingleTapConfirmed(MotionEvent arg0) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean onDown(MotionEvent e) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
// TODO Auto-generated method stub
return false;
}
@Override
public void onLongPress(MotionEvent e) {
// TODO Auto-generated method stub
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2,
float distanceX, float distanceY) {
// TODO Auto-generated method stub
if (mIsMove) {
mMatrix.postTranslate(-distanceX, -distanceY);
invalidate();
}
return true;
}
@Override
public void onShowPress(MotionEvent e) {
// TODO Auto-generated method stub
}
@Override
public boolean onSingleTapUp(MotionEvent e) {
// TODO Auto-generated method stub
return false;
}
}
public void setMove(boolean isMove) {
mIsMove = isMove;
}
// EA VIKALP
public void setWarpBitmap(Bitmap bmp) {
fg = true;// é‡�ç½®æ ‡å¿—
first = 0;
mBmp = bmp;
width = bmp.getWidth();
height = bmp.getHeight();
// 新建�?��Bitmap
// SU VIKALP
// newBmp = Bitmap.createBitmap(width, height,
// Bitmap.Config.RGB_565);
newBmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
// EU VIKALP
image = new int[width * height];
mBmp.getPixels(image, 0, width, 0, 0, width, height);
newBmp.setPixels(image, 0, width, 0, 0, width, height);
// super.setImageBitmap(mBmp);
}
public void setMode(int mode) {
this.MODE = mode;
}
/**
* �?回处�好的图片
*
* @return
*/
public Bitmap getWrapBitmap() {
return newBmp;
}
public void changeBitmapContrastBrightness() {
float contrast, brightness;
Random generator = new Random();
contrast = generator.nextFloat();
brightness = contrast;
// Log.i(TAG, "changeBitmapContrastBrightness " + contrast);
ColorMatrix cm = new ColorMatrix(new float[] {
0.501f, 0, 0, 0,0,// red
0, 0, 0, 0, brightness,// green
0, 0, 0.501f, 0, brightness,// blue
0, 0, 0, 1, 0 // alpha
});
mPaint.setColorFilter(new ColorMatrixColorFilter(cm));
invalidate();
}
}