Android哈哈镜实现源码

以前都是Windows处理图像，图像格式和浮点数运算都不是特别注意，在Android平台做图像处理（我做的Android平台是基于arm的），格式转换和运算速度着实费了点时间（因为本人比较菜），废话不多说了，贴上JNI部分源码。

#include "opencv/cv.h"

#include "opencv/highgui.h"

#include "opencv/cvwimage.h"

#include "lxcPicProcess.h"

#include "opencv2/core/core.hpp"

#include <string.h>

#include <vector>

using namespace cv;

#define RANGE 100 // 水平外凹或外凸的幅度

#define PI 3.1415926

using namespace std;

void MaxFrame(IplImage* frame)

{

uchar* old_data = (uchar*)frame->imageData;

uchar* new_data = new uchar[frame->widthStep * frame->height];

int center_X = frame->width / 2;

int center_Y = frame->height / 2;

int radius = 400;

int newX = 0;

int newY = 0;

int real_radius = (int)(radius / 2.0);

for (int i = 0; i < frame->width; i++)

{

for (int j = 0; j < frame->height; j++)

{

int tX = i - center_X;

int tY = j - center_Y;

int distance = (int)(tX * tX + tY * tY);

if (distance < radius * radius)

{

newX = (int)((float)(tX) / 2.0);

newY = (int)((float)(tY) / 2.0);

newX = (int) (newX * (sqrt((double)distance) / real_radius));

newX = (int) (newX * (sqrt((double)distance) / real_radius));

newX = newX + center_X;

newY = newY + center_Y;

new_data[frame->widthStep * j + i * 4] = old_data[frame->widthStep * j + i * 4];

new_data[frame->widthStep * j + i * 4 + 1] = old_data[frame->widthStep * newY + newX * 4 + 1];

new_data[frame->widthStep * j + i * 4 + 2] =old_data[frame->widthStep * newY + newX * 4 + 2];

new_data[frame->widthStep * j + i * 4 + 3] =old_data[frame->widthStep * newY + newX * 4 + 3];

}

else

{

new_data[frame->widthStep * j + i * 4] = old_data[frame->widthStep * j + i * 4];

new_data[frame->widthStep * j + i * 4 + 1] = old_data[frame->widthStep * j + i * 4 + 1];

new_data[frame->widthStep * j + i * 4 + 2] = old_data[frame->widthStep * j + i * 4 + 2];

new_data[frame->widthStep * j + i * 4 + 3] =old_data[frame->widthStep * j + i * 4 + 3];

}

}

}

memcpy(old_data, new_data, sizeof(uchar) * frame->widthStep * frame->height);

delete[] new_data;

}

void MinFrame(IplImage* frame)

{

uchar* old_data = (uchar*)frame->imageData;

uchar* new_data = new uchar[frame->widthStep * frame->height];

int center_X = frame->width / 2;

int center_Y = frame->height / 2;

int radius = 0;

double theta = 0;

int newX = 0;

int newY = 0;

for (int i = 0; i < frame->width; i++)

{

for (int j = 0; j < frame->height; j++)

{

int tX = i - center_X;

int tY = j - center_Y;

theta = atan2((double)tY, (double)tX);

radius = (int)sqrt((double)(tX * tX) + (double) (tY * tY));

int newR = (int)(sqrt((double)radius) * 12);

newX = center_X + (int)(newR * cos(theta));

newY = center_Y + (int)(newR * sin(theta));

if (!(newX > 0 && newX < frame->width))

{

newX = 0;

}

if (!(newY > 0 && newY < frame->height))

{

newY = 0;

}

new_data[frame->widthStep * j + i * 4] = old_data[frame->widthStep * j + i * 4];

new_data[frame->widthStep * j + i * 4 + 1] = old_data[frame->widthStep * newY + newX * 4 + 1];

new_data[frame->widthStep * j + i * 4 + 2] =old_data[frame->widthStep * newY + newX * 4 + 2];

new_data[frame->widthStep * j + i * 4 + 3] =old_data[frame->widthStep * newY + newX * 4 + 3];

}

}

memcpy(old_data, new_data, sizeof(uchar) * frame->widthStep * frame->height);

delete[] new_data;

}

//com.example.facedec

JNIEXPORT jintArray JNICALL Java_com_example_facedec_lxcPicProcess_MaxFrame

(JNIEnv* env, jclass obj, jintArray buf, jint w, jint h)

{

jint *cbuf;

cbuf = env->GetIntArrayElements(buf, false);

if(cbuf == NULL){

return 0;

}

int size=w * h;

Mat imgData(h, w, CV_8UC4, (unsigned char*)cbuf);

IplImage *image=&IplImage(imgData);

MaxFrame(image);

jintArray result = env->NewIntArray(size);

env->SetIntArrayRegion(result, 0, size, cbuf);

env->ReleaseIntArrayElements(buf, cbuf, 0);

return result;

}

JNIEXPORT jintArray JNICALL Java_com_example_facedec_lxcPicProcess_MinFrame

(JNIEnv* env, jclass obj, jintArray buf, jint w, jint h)

{

jint *cbuf;

cbuf = env->GetIntArrayElements(buf, false);

if(cbuf == NULL){

return 0;

}

Mat imgData(h, w, CV_8UC4, (unsigned char*)cbuf);

IplImage *src= &IplImage(imgData);

MinFrame(src);

int size=w * h;

jintArray result = env->NewIntArray(size);

env->SetIntArrayRegion(result, 0, size, cbuf);

env->ReleaseIntArrayElements(buf, cbuf, 0);

return result;

}