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image.c
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image.c
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#include "image.h"
#include "utils.h"
#include "highgui.h"
#include "blas.h"
#include "cuda.h"
#include <stdio.h>
#include <math.h>
#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"
#define STB_IMAGE_WRITE_IMPLEMENTATION
#include "stb_image_write.h"
int windows = 0;
float colors[6][3] = { {1,0,1}, {0,0,1},{0,1,1},{0,1,0},{1,1,0},{1,0,0} };
float get_color(int c, int x, int max)
{
float ratio = ((float)x/max)*5;
int i = floor(ratio);
int j = ceil(ratio);
ratio -= i;
float r = (1-ratio) * colors[i][c] + ratio*colors[j][c];
//printf("%f\n", r);
return r;
}
image mask_to_rgb(image mask)
{
int n = mask.c;
image im = make_image(mask.w, mask.h, 3);
int i, j;
for(j = 0; j < n; ++j){
int offset = j*123457 % n;
float red = get_color(2,offset,n);
float green = get_color(1,offset,n);
float blue = get_color(0,offset,n);
for(i = 0; i < im.w*im.h; ++i){
im.data[i + 0*im.w*im.h] += mask.data[j*im.h*im.w + i]*red;
im.data[i + 1*im.w*im.h] += mask.data[j*im.h*im.w + i]*green;
im.data[i + 2*im.w*im.h] += mask.data[j*im.h*im.w + i]*blue;
}
}
return im;
}
static float get_pixel(image m, int x, int y, int c)
{
assert(x < m.w && y < m.h && c < m.c);
return m.data[c*m.h*m.w + y*m.w + x];
}
static float get_pixel_extend(image m, int x, int y, int c)
{
if(x < 0 || x >= m.w || y < 0 || y >= m.h) return 0;
/*
if(x < 0) x = 0;
if(x >= m.w) x = m.w-1;
if(y < 0) y = 0;
if(y >= m.h) y = m.h-1;
*/
if(c < 0 || c >= m.c) return 0;
return get_pixel(m, x, y, c);
}
static void set_pixel(image m, int x, int y, int c, float val)
{
if (x < 0 || y < 0 || c < 0 || x >= m.w || y >= m.h || c >= m.c) return;
assert(x < m.w && y < m.h && c < m.c);
m.data[c*m.h*m.w + y*m.w + x] = val;
}
static void add_pixel(image m, int x, int y, int c, float val)
{
assert(x < m.w && y < m.h && c < m.c);
m.data[c*m.h*m.w + y*m.w + x] += val;
}
static float bilinear_interpolate(image im, float x, float y, int c)
{
int ix = (int) floorf(x);
int iy = (int) floorf(y);
float dx = x - ix;
float dy = y - iy;
float val = (1-dy) * (1-dx) * get_pixel_extend(im, ix, iy, c) +
dy * (1-dx) * get_pixel_extend(im, ix, iy+1, c) +
(1-dy) * dx * get_pixel_extend(im, ix+1, iy, c) +
dy * dx * get_pixel_extend(im, ix+1, iy+1, c);
return val;
}
void composite_image(image source, image dest, int dx, int dy)
{
int x,y,k;
for(k = 0; k < source.c; ++k){
for(y = 0; y < source.h; ++y){
for(x = 0; x < source.w; ++x){
float val = get_pixel(source, x, y, k);
float val2 = get_pixel_extend(dest, dx+x, dy+y, k);
set_pixel(dest, dx+x, dy+y, k, val * val2);
}
}
}
}
image border_image(image a, int border)
{
image b = make_image(a.w + 2*border, a.h + 2*border, a.c);
int x,y,k;
for(k = 0; k < b.c; ++k){
for(y = 0; y < b.h; ++y){
for(x = 0; x < b.w; ++x){
float val = get_pixel_extend(a, x - border, y - border, k);
if(x - border < 0 || x - border >= a.w || y - border < 0 || y - border >= a.h) val = 1;
set_pixel(b, x, y, k, val);
}
}
}
return b;
}
image tile_images(image a, image b, int dx)
{
if(a.w == 0) return copy_image(b);
image c = make_image(a.w + b.w + dx, (a.h > b.h) ? a.h : b.h, (a.c > b.c) ? a.c : b.c);
fill_cpu(c.w*c.h*c.c, 1, c.data, 1);
embed_image(a, c, 0, 0);
composite_image(b, c, a.w + dx, 0);
return c;
}
image get_label(image **characters, char *string, int size)
{
size = size/10;
if(size > 7) size = 7;
image label = make_empty_image(0,0,0);
while(*string){
image l = characters[size][(int)*string];
image n = tile_images(label, l, -size - 1 + (size+1)/2);
free_image(label);
label = n;
++string;
}
image b = border_image(label, label.h*.25);
free_image(label);
return b;
}
void draw_label(image a, int r, int c, image label, const float *rgb)
{
int w = label.w;
int h = label.h;
if (r - h >= 0) r = r - h;
int i, j, k;
for(j = 0; j < h && j + r < a.h; ++j){
for(i = 0; i < w && i + c < a.w; ++i){
for(k = 0; k < label.c; ++k){
float val = get_pixel(label, i, j, k);
set_pixel(a, i+c, j+r, k, rgb[k] * val);
}
}
}
}
void draw_box(image a, int x1, int y1, int x2, int y2, float r, float g, float b)
{
//normalize_image(a);
int i;
if(x1 < 0) x1 = 0;
if(x1 >= a.w) x1 = a.w-1;
if(x2 < 0) x2 = 0;
if(x2 >= a.w) x2 = a.w-1;
if(y1 < 0) y1 = 0;
if(y1 >= a.h) y1 = a.h-1;
if(y2 < 0) y2 = 0;
if(y2 >= a.h) y2 = a.h-1;
for(i = x1; i <= x2; ++i){
a.data[i + y1*a.w + 0*a.w*a.h] = r;
a.data[i + y2*a.w + 0*a.w*a.h] = r;
a.data[i + y1*a.w + 1*a.w*a.h] = g;
a.data[i + y2*a.w + 1*a.w*a.h] = g;
a.data[i + y1*a.w + 2*a.w*a.h] = b;
a.data[i + y2*a.w + 2*a.w*a.h] = b;
}
for(i = y1; i <= y2; ++i){
a.data[x1 + i*a.w + 0*a.w*a.h] = r;
a.data[x2 + i*a.w + 0*a.w*a.h] = r;
a.data[x1 + i*a.w + 1*a.w*a.h] = g;
a.data[x2 + i*a.w + 1*a.w*a.h] = g;
a.data[x1 + i*a.w + 2*a.w*a.h] = b;
a.data[x2 + i*a.w + 2*a.w*a.h] = b;
}
}
void draw_box_width(image a, int x1, int y1, int x2, int y2, int w, float r, float g, float b)
{
int i;
for(i = 0; i < w; ++i){
draw_box(a, x1+i, y1+i, x2-i, y2-i, r, g, b);
}
}
void draw_bbox(image a, box bbox, int w, float r, float g, float b)
{
int left = (bbox.x-bbox.w/2)*a.w;
int right = (bbox.x+bbox.w/2)*a.w;
int top = (bbox.y-bbox.h/2)*a.h;
int bot = (bbox.y+bbox.h/2)*a.h;
int i;
for(i = 0; i < w; ++i){
draw_box(a, left+i, top+i, right-i, bot-i, r, g, b);
}
}
image **load_alphabet()
{
int i, j;
const int nsize = 8;
image **alphabets = calloc(nsize, sizeof(image));
for(j = 0; j < nsize; ++j){
alphabets[j] = calloc(128, sizeof(image));
for(i = 32; i < 127; ++i){
char buff[256];
sprintf(buff, "data/labels/%d_%d.png", i, j);
alphabets[j][i] = load_image_color(buff, 0, 0);
}
}
return alphabets;
}
void save_cut_image(int px, int py, int ph, int pw, int no, image m_img, char **names, float cut_pro, int the_class)
{
image copy = copy_image(m_img);
if (m_img.c == 3) rgbgr_image(copy);
int x, y, k;
char buff[256];
sprintf(buff, "results//%s%.0f%%%d.jpg", names[the_class], cut_pro, no);
printf(" cut_class :%s ...........cut_class:%.0f ", names[the_class], cut_pro);
printf(names[the_class]);
printf("%f",cut_pro);
IplImage *disp = cvCreateImage(cvSize(m_img.w, m_img.h), IPL_DEPTH_8U, m_img.c);
int step = disp->widthStep;
for (y = 0; y < m_img.h; ++y) {
for (x = 0; x < m_img.w; ++x) {
for (k = 0; k < m_img.c; ++k) {
disp->imageData[y*step + x*m_img.c + k] = (unsigned char)(get_pixel(copy, x, y, k) * 255);
}
}
}
CvMat *pMat = cvCreateMatHeader(m_img.w, m_img.h, IPL_DEPTH_8U);
CvRect rect = cvRect(px, py, pw, ph);
cvGetSubRect(disp, pMat, rect);
IplImage *pSubImg = cvCreateImage(cvSize(pw, ph), IPL_DEPTH_8U, m_img.c);
cvGetImage(pMat, pSubImg);
cvSaveImage(buff, pSubImg, 0);
free_image(copy);
}
void draw_detections(image im, detection *dets, int num, float thresh, char **names, image **alphabet, int classes)
{
int i,j; //num代表有几个框框，j用来选出class，dets[i].prob[j]
//dets[i]为第i个框框
//原函数只有画框，因为截图会被画框干扰（如果两个框重合的话，后截图的那个框会有紫色条子），所以分为两个循环进行
//
///循环一，先截图
for(i = 0; i < num; ++i){
int class = -1;
for(j = 0; j < classes; ++j) //选出class
{
if (dets[i].prob[j] > thresh){
if (class < 0) {
class = j;
}
}
}
if(class >= 0){
box b = dets[i].bbox;
int left = (b.x-b.w/2.)*im.w;
int right = (b.x+b.w/2.)*im.w;
int top = (b.y-b.h/2.)*im.h;
int bot = (b.y+b.h/2.)*im.h;
if(left < 0) left = 0;
if(right > im.w-1) right = im.w-1;
if(top < 0) top = 0;
if(bot > im.h-1) bot = im.h-1;
//////////////////////////自添加用于裁剪图片
int the_class = class;
float cut_pro = dets[i].prob[class]*100;
printf("\ncut_class:%s ...........class_pro:%.0f%% \n", names[the_class], cut_pro);
int pre_x = left;
int pre_y = top;
int pre_h = bot - top;
int pre_w = right - left;
save_cut_image(pre_x, pre_y, pre_h, pre_w, i, im, names, cut_pro, the_class);
printf("/************ cut and save over *****************/ \n\n");
//////////////////////////
}
}
///循环二，画框+生成labestr
for(i = 0; i < num; ++i){
char labelstr[4096] = {0};
int class = -1;
for(j = 0; j < classes; ++j){
if (dets[i].prob[j] > thresh){
if (class < 0) {
strcat(labelstr, names[j]);
class = j;
} else {
strcat(labelstr, ", ");
strcat(labelstr, names[j]);
}
/////这一段是自己加的，实现图片标签旁边显示预测概率 如person:98%
char prob[4];
int pr=(int)(dets[i].prob[j] * 100);
int ii=1;
if (pr==100)ii=2;
while(pr)
{
prob[ii--]=pr%10+'0';
pr=pr/10;
}
strcat(labelstr,":");
strcat(labelstr,prob);
strcat(labelstr,"%");
///////////////////////////////////////////////
printf("%s: %.0f%%\n", names[j], dets[i].prob[j]*100);
}
}
if(class >= 0){
int width = im.h * .006;
int offset = class*123457 % classes;
float red = get_color(2,offset,classes);
float green = get_color(1,offset,classes);
float blue = get_color(0,offset,classes);
float rgb[3];
rgb[0] = red;
rgb[1] = green;
rgb[2] = blue;
box b = dets[i].bbox;
int left = (b.x-b.w/2.)*im.w;
int right = (b.x+b.w/2.)*im.w;
int top = (b.y-b.h/2.)*im.h;
int bot = (b.y+b.h/2.)*im.h;
if(left < 0) left = 0;
if(right > im.w-1) right = im.w-1;
if(top < 0) top = 0;
if(bot > im.h-1) bot = im.h-1;
draw_box_width(im, left, top, right, bot, width, red, green, blue);
if (alphabet) {
image label = get_label(alphabet, labelstr, (im.h*.03));
draw_label(im, top + width, left, label, rgb);
free_image(label);
}
if (dets[i].mask){
image mask = float_to_image(14, 14, 1, dets[i].mask);
image resized_mask = resize_image(mask, b.w*im.w, b.h*im.h);
image tmask = threshold_image(resized_mask, .5);
embed_image(tmask, im, left, top);
free_image(mask);
free_image(resized_mask);
free_image(tmask);
}
}
}
}
void transpose_image(image im)
{
assert(im.w == im.h);
int n, m;
int c;
for(c = 0; c < im.c; ++c){
for(n = 0; n < im.w-1; ++n){
for(m = n + 1; m < im.w; ++m){
float swap = im.data[m + im.w*(n + im.h*c)];
im.data[m + im.w*(n + im.h*c)] = im.data[n + im.w*(m + im.h*c)];
im.data[n + im.w*(m + im.h*c)] = swap;
}
}
}
}
void rotate_image_cw(image im, int times)
{
assert(im.w == im.h);
times = (times + 400) % 4;
int i, x, y, c;
int n = im.w;
for(i = 0; i < times; ++i){
for(c = 0; c < im.c; ++c){
for(x = 0; x < n/2; ++x){
for(y = 0; y < (n-1)/2 + 1; ++y){
float temp = im.data[y + im.w*(x + im.h*c)];
im.data[y + im.w*(x + im.h*c)] = im.data[n-1-x + im.w*(y + im.h*c)];
im.data[n-1-x + im.w*(y + im.h*c)] = im.data[n-1-y + im.w*(n-1-x + im.h*c)];
im.data[n-1-y + im.w*(n-1-x + im.h*c)] = im.data[x + im.w*(n-1-y + im.h*c)];
im.data[x + im.w*(n-1-y + im.h*c)] = temp;
}
}
}
}
}
void flip_image(image a)
{
int i,j,k;
for(k = 0; k < a.c; ++k){
for(i = 0; i < a.h; ++i){
for(j = 0; j < a.w/2; ++j){
int index = j + a.w*(i + a.h*(k));
int flip = (a.w - j - 1) + a.w*(i + a.h*(k));
float swap = a.data[flip];
a.data[flip] = a.data[index];
a.data[index] = swap;
}
}
}
}
image image_distance(image a, image b)
{
int i,j;
image dist = make_image(a.w, a.h, 1);
for(i = 0; i < a.c; ++i){
for(j = 0; j < a.h*a.w; ++j){
dist.data[j] += pow(a.data[i*a.h*a.w+j]-b.data[i*a.h*a.w+j],2);
}
}
for(j = 0; j < a.h*a.w; ++j){
dist.data[j] = sqrt(dist.data[j]);
}
return dist;
}
void ghost_image(image source, image dest, int dx, int dy)
{
int x,y,k;
float max_dist = sqrt((-source.w/2. + .5)*(-source.w/2. + .5));
for(k = 0; k < source.c; ++k){
for(y = 0; y < source.h; ++y){
for(x = 0; x < source.w; ++x){
float dist = sqrt((x - source.w/2. + .5)*(x - source.w/2. + .5) + (y - source.h/2. + .5)*(y - source.h/2. + .5));
float alpha = (1 - dist/max_dist);
if(alpha < 0) alpha = 0;
float v1 = get_pixel(source, x,y,k);
float v2 = get_pixel(dest, dx+x,dy+y,k);
float val = alpha*v1 + (1-alpha)*v2;
set_pixel(dest, dx+x, dy+y, k, val);
}
}
}
}
void blocky_image(image im, int s)
{
int i,j,k;
for(k = 0; k < im.c; ++k){
for(j = 0; j < im.h; ++j){
for(i = 0; i < im.w; ++i){
im.data[i + im.w*(j + im.h*k)] = im.data[i/s*s + im.w*(j/s*s + im.h*k)];
}
}
}
}
void censor_image(image im, int dx, int dy, int w, int h)
{
int i,j,k;
int s = 32;
if(dx < 0) dx = 0;
if(dy < 0) dy = 0;
for(k = 0; k < im.c; ++k){
for(j = dy; j < dy + h && j < im.h; ++j){
for(i = dx; i < dx + w && i < im.w; ++i){
im.data[i + im.w*(j + im.h*k)] = im.data[i/s*s + im.w*(j/s*s + im.h*k)];
//im.data[i + j*im.w + k*im.w*im.h] = 0;
}
}
}
}
void embed_image(image source, image dest, int dx, int dy)
{
int x,y,k;
for(k = 0; k < source.c; ++k){
for(y = 0; y < source.h; ++y){
for(x = 0; x < source.w; ++x){
float val = get_pixel(source, x,y,k);
set_pixel(dest, dx+x, dy+y, k, val);
}
}
}
}
image collapse_image_layers(image source, int border)
{
int h = source.h;
h = (h+border)*source.c - border;
image dest = make_image(source.w, h, 1);
int i;
for(i = 0; i < source.c; ++i){
image layer = get_image_layer(source, i);
int h_offset = i*(source.h+border);
embed_image(layer, dest, 0, h_offset);
free_image(layer);
}
return dest;
}
void constrain_image(image im)
{
int i;
for(i = 0; i < im.w*im.h*im.c; ++i){
if(im.data[i] < 0) im.data[i] = 0;
if(im.data[i] > 1) im.data[i] = 1;
}
}
void normalize_image(image p)
{
int i;
float min = 9999999;
float max = -999999;
for(i = 0; i < p.h*p.w*p.c; ++i){
float v = p.data[i];
if(v < min) min = v;
if(v > max) max = v;
}
if(max - min < .000000001){
min = 0;
max = 1;
}
for(i = 0; i < p.c*p.w*p.h; ++i){
p.data[i] = (p.data[i] - min)/(max-min);
}
}
void normalize_image2(image p)
{
float *min = calloc(p.c, sizeof(float));
float *max = calloc(p.c, sizeof(float));
int i,j;
for(i = 0; i < p.c; ++i) min[i] = max[i] = p.data[i*p.h*p.w];
for(j = 0; j < p.c; ++j){
for(i = 0; i < p.h*p.w; ++i){
float v = p.data[i+j*p.h*p.w];
if(v < min[j]) min[j] = v;
if(v > max[j]) max[j] = v;
}
}
for(i = 0; i < p.c; ++i){
if(max[i] - min[i] < .000000001){
min[i] = 0;
max[i] = 1;
}
}
for(j = 0; j < p.c; ++j){
for(i = 0; i < p.w*p.h; ++i){
p.data[i+j*p.h*p.w] = (p.data[i+j*p.h*p.w] - min[j])/(max[j]-min[j]);
}
}
free(min);
free(max);
}
void copy_image_into(image src, image dest)
{
memcpy(dest.data, src.data, src.h*src.w*src.c*sizeof(float));
}
image copy_image(image p)
{
image copy = p;
copy.data = calloc(p.h*p.w*p.c, sizeof(float));
memcpy(copy.data, p.data, p.h*p.w*p.c*sizeof(float));
return copy;
}
void rgbgr_image(image im)
{
int i;
for(i = 0; i < im.w*im.h; ++i){
float swap = im.data[i];
im.data[i] = im.data[i+im.w*im.h*2];
im.data[i+im.w*im.h*2] = swap;
}
}
int show_image(image p, const char *name, int ms)
{
#ifdef OPENCV
int c = show_image_cv(p, name, ms);
return c;
#else
fprintf(stderr, "Not compiled with OpenCV, saving to %s.png instead\n", name);
save_image(p, name);
return -1;
#endif
}
void save_image_options(image im, const char *name, IMTYPE f, int quality)
{
char buff[256];
//sprintf(buff, "%s (%d)", name, windows);
if(f == PNG) sprintf(buff, "%s.png", name);
else if (f == BMP) sprintf(buff, "%s.bmp", name);
else if (f == TGA) sprintf(buff, "%s.tga", name);
else if (f == JPG) sprintf(buff, "%s.jpg", name);
else sprintf(buff, "%s.png", name);
unsigned char *data = calloc(im.w*im.h*im.c, sizeof(char));
int i,k;
for(k = 0; k < im.c; ++k){
for(i = 0; i < im.w*im.h; ++i){
data[i*im.c+k] = (unsigned char) (255*im.data[i + k*im.w*im.h]);
}
}
int success = 0;
if(f == PNG) success = stbi_write_png(buff, im.w, im.h, im.c, data, im.w*im.c);
else if (f == BMP) success = stbi_write_bmp(buff, im.w, im.h, im.c, data);
else if (f == TGA) success = stbi_write_tga(buff, im.w, im.h, im.c, data);
else if (f == JPG) success = stbi_write_jpg(buff, im.w, im.h, im.c, data, quality);
free(data);
if(!success) fprintf(stderr, "Failed to write image %s\n", buff);
}
void save_image(image im, const char *name)
{
save_image_options(im, name, JPG, 80);
}
void show_image_layers(image p, char *name)
{
int i;
char buff[256];
for(i = 0; i < p.c; ++i){
sprintf(buff, "%s - Layer %d", name, i);
image layer = get_image_layer(p, i);
show_image(layer, buff, 1);
free_image(layer);
}
}
void show_image_collapsed(image p, char *name)
{
image c = collapse_image_layers(p, 1);
show_image(c, name, 1);
free_image(c);
}
image make_empty_image(int w, int h, int c)
{
image out;
out.data = 0;
out.h = h;
out.w = w;
out.c = c;
return out;
}
image make_image(int w, int h, int c)
{
image out = make_empty_image(w,h,c);
out.data = calloc(h*w*c, sizeof(float));
return out;
}
image make_random_image(int w, int h, int c)
{
image out = make_empty_image(w,h,c);
out.data = calloc(h*w*c, sizeof(float));
int i;
for(i = 0; i < w*h*c; ++i){
out.data[i] = (rand_normal() * .25) + .5;
}
return out;
}
image float_to_image(int w, int h, int c, float *data)
{
image out = make_empty_image(w,h,c);
out.data = data;
return out;
}
void place_image(image im, int w, int h, int dx, int dy, image canvas)
{
int x, y, c;
for(c = 0; c < im.c; ++c){
for(y = 0; y < h; ++y){
for(x = 0; x < w; ++x){
float rx = ((float)x / w) * im.w;
float ry = ((float)y / h) * im.h;
float val = bilinear_interpolate(im, rx, ry, c);
set_pixel(canvas, x + dx, y + dy, c, val);
}
}
}
}
image center_crop_image(image im, int w, int h)
{
int m = (im.w < im.h) ? im.w : im.h;
image c = crop_image(im, (im.w - m) / 2, (im.h - m)/2, m, m);
image r = resize_image(c, w, h);
free_image(c);
return r;
}
image rotate_crop_image(image im, float rad, float s, int w, int h, float dx, float dy, float aspect)
{
int x, y, c;
float cx = im.w/2.;
float cy = im.h/2.;
image rot = make_image(w, h, im.c);
for(c = 0; c < im.c; ++c){
for(y = 0; y < h; ++y){
for(x = 0; x < w; ++x){
float rx = cos(rad)*((x - w/2.)/s*aspect + dx/s*aspect) - sin(rad)*((y - h/2.)/s + dy/s) + cx;
float ry = sin(rad)*((x - w/2.)/s*aspect + dx/s*aspect) + cos(rad)*((y - h/2.)/s + dy/s) + cy;
float val = bilinear_interpolate(im, rx, ry, c);
set_pixel(rot, x, y, c, val);
}
}
}
return rot;
}
image rotate_image(image im, float rad)
{
int x, y, c;
float cx = im.w/2.;
float cy = im.h/2.;
image rot = make_image(im.w, im.h, im.c);
for(c = 0; c < im.c; ++c){
for(y = 0; y < im.h; ++y){
for(x = 0; x < im.w; ++x){
float rx = cos(rad)*(x-cx) - sin(rad)*(y-cy) + cx;
float ry = sin(rad)*(x-cx) + cos(rad)*(y-cy) + cy;
float val = bilinear_interpolate(im, rx, ry, c);
set_pixel(rot, x, y, c, val);
}
}
}
return rot;
}
void fill_image(image m, float s)
{
int i;
for(i = 0; i < m.h*m.w*m.c; ++i) m.data[i] = s;
}
void translate_image(image m, float s)
{
int i;
for(i = 0; i < m.h*m.w*m.c; ++i) m.data[i] += s;
}
void scale_image(image m, float s)
{
int i;
for(i = 0; i < m.h*m.w*m.c; ++i) m.data[i] *= s;
}
image crop_image(image im, int dx, int dy, int w, int h)
{
image cropped = make_image(w, h, im.c);
int i, j, k;
for(k = 0; k < im.c; ++k){
for(j = 0; j < h; ++j){
for(i = 0; i < w; ++i){
int r = j + dy;
int c = i + dx;
float val = 0;
r = constrain_int(r, 0, im.h-1);
c = constrain_int(c, 0, im.w-1);
val = get_pixel(im, c, r, k);
set_pixel(cropped, i, j, k, val);
}
}
}
return cropped;
}
int best_3d_shift_r(image a, image b, int min, int max)
{
if(min == max) return min;
int mid = floor((min + max) / 2.);
image c1 = crop_image(b, 0, mid, b.w, b.h);
image c2 = crop_image(b, 0, mid+1, b.w, b.h);
float d1 = dist_array(c1.data, a.data, a.w*a.h*a.c, 10);
float d2 = dist_array(c2.data, a.data, a.w*a.h*a.c, 10);
free_image(c1);
free_image(c2);
if(d1 < d2) return best_3d_shift_r(a, b, min, mid);
else return best_3d_shift_r(a, b, mid+1, max);
}
int best_3d_shift(image a, image b, int min, int max)
{
int i;
int best = 0;
float best_distance = FLT_MAX;
for(i = min; i <= max; i += 2){
image c = crop_image(b, 0, i, b.w, b.h);
float d = dist_array(c.data, a.data, a.w*a.h*a.c, 100);
if(d < best_distance){
best_distance = d;
best = i;
}
printf("%d %f\n", i, d);
free_image(c);
}
return best;
}
void composite_3d(char *f1, char *f2, char *out, int delta)
{
if(!out) out = "out";
image a = load_image(f1, 0,0,0);
image b = load_image(f2, 0,0,0);
int shift = best_3d_shift_r(a, b, -a.h/100, a.h/100);
image c1 = crop_image(b, 10, shift, b.w, b.h);
float d1 = dist_array(c1.data, a.data, a.w*a.h*a.c, 100);
image c2 = crop_image(b, -10, shift, b.w, b.h);
float d2 = dist_array(c2.data, a.data, a.w*a.h*a.c, 100);
if(d2 < d1 && 0){
image swap = a;
a = b;
b = swap;
shift = -shift;
printf("swapped, %d\n", shift);
}
else{
printf("%d\n", shift);
}
image c = crop_image(b, delta, shift, a.w, a.h);
int i;
for(i = 0; i < c.w*c.h; ++i){
c.data[i] = a.data[i];
}
save_image(c, out);
}
void letterbox_image_into(image im, int w, int h, image boxed)
{
int new_w = im.w;
int new_h = im.h;
if (((float)w/im.w) < ((float)h/im.h)) {
new_w = w;
new_h = (im.h * w)/im.w;
} else {
new_h = h;
new_w = (im.w * h)/im.h;
}
image resized = resize_image(im, new_w, new_h);
embed_image(resized, boxed, (w-new_w)/2, (h-new_h)/2);
free_image(resized);
}
image letterbox_image(image im, int w, int h)
{
int new_w = im.w;
int new_h = im.h;
if (((float)w/im.w) < ((float)h/im.h)) {
new_w = w;
new_h = (im.h * w)/im.w;
} else {
new_h = h;
new_w = (im.w * h)/im.h;
}
image resized = resize_image(im, new_w, new_h);
image boxed = make_image(w, h, im.c);
fill_image(boxed, .5);
//int i;
//for(i = 0; i < boxed.w*boxed.h*boxed.c; ++i) boxed.data[i] = 0;
embed_image(resized, boxed, (w-new_w)/2, (h-new_h)/2);
free_image(resized);
return boxed;
}
image resize_max(image im, int max)
{
int w = im.w;
int h = im.h;
if(w > h){
h = (h * max) / w;
w = max;
} else {
w = (w * max) / h;
h = max;
}
if(w == im.w && h == im.h) return im;
image resized = resize_image(im, w, h);
return resized;
}
image resize_min(image im, int min)
{
int w = im.w;
int h = im.h;
if(w < h){
h = (h * min) / w;
w = min;
} else {
w = (w * min) / h;
h = min;
}
if(w == im.w && h == im.h) return im;
image resized = resize_image(im, w, h);
return resized;
}
image random_crop_image(image im, int w, int h)
{
int dx = rand_int(0, im.w - w);
int dy = rand_int(0, im.h - h);
image crop = crop_image(im, dx, dy, w, h);
return crop;
}
augment_args random_augment_args(image im, float angle, float aspect, int low, int high, int w, int h)
{
augment_args a = {0};
aspect = rand_scale(aspect);
int r = rand_int(low, high);
int min = (im.h < im.w*aspect) ? im.h : im.w*aspect;
float scale = (float)r / min;
float rad = rand_uniform(-angle, angle) * TWO_PI / 360.;
float dx = (im.w*scale/aspect - w) / 2.;
float dy = (im.h*scale - w) / 2.;
//if(dx < 0) dx = 0;
//if(dy < 0) dy = 0;
dx = rand_uniform(-dx, dx);
dy = rand_uniform(-dy, dy);
a.rad = rad;
a.scale = scale;
a.w = w;
a.h = h;
a.dx = dx;
a.dy = dy;
a.aspect = aspect;
return a;
}
image random_augment_image(image im, float angle, float aspect, int low, int high, int w, int h)
{
augment_args a = random_augment_args(im, angle, aspect, low, high, w, h);
image crop = rotate_crop_image(im, a.rad, a.scale, a.w, a.h, a.dx, a.dy, a.aspect);
return crop;
}
float three_way_max(float a, float b, float c)
{
return (a > b) ? ( (a > c) ? a : c) : ( (b > c) ? b : c) ;
}
float three_way_min(float a, float b, float c)
{
return (a < b) ? ( (a < c) ? a : c) : ( (b < c) ? b : c) ;
}
void yuv_to_rgb(image im)
{
assert(im.c == 3);
int i, j;
float r, g, b;
float y, u, v;
for(j = 0; j < im.h; ++j){
for(i = 0; i < im.w; ++i){
y = get_pixel(im, i , j, 0);
u = get_pixel(im, i , j, 1);