| | |
| | | #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} }; |
| | |
| | | |
| | | void draw_box(image a, int x1, int y1, int x2, int y2, float r, float g, float b) |
| | | { |
| | | normalize_image(a); |
| | | //normalize_image(a); |
| | | int i; |
| | | if(x1 < 0) x1 = 0; |
| | | if(x1 >= a.w) x1 = a.w-1; |
| | |
| | | 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) |
| | | { |
| | | float *min = calloc(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; |
| | | } |
| | | } |
| | | |
| | | void show_image(image p, char *name) |
| | | #ifdef OPENCV |
| | | void show_image_cv(image p, char *name) |
| | | { |
| | | int x,y,k; |
| | | image copy = copy_image(p); |
| | | normalize_image(copy); |
| | | rgbgr_image(copy); |
| | | //normalize_image(copy); |
| | | |
| | | char buff[256]; |
| | | //sprintf(buff, "%s (%d)", name, windows); |
| | |
| | | } |
| | | } |
| | | free_image(copy); |
| | | if(disp->height < 500 || disp->width < 500 || disp->height > 1000){ |
| | | int w = 500; |
| | | if(disp->height < 448 || disp->width < 448 || disp->height > 1000){ |
| | | int w = 448; |
| | | int h = w*p.h/p.w; |
| | | if(h > 1000){ |
| | | h = 1000; |
| | |
| | | } |
| | | IplImage *buffer = disp; |
| | | disp = cvCreateImage(cvSize(w, h), buffer->depth, buffer->nChannels); |
| | | cvResize(buffer, disp, CV_INTER_NN); |
| | | cvResize(buffer, disp, CV_INTER_LINEAR); |
| | | cvReleaseImage(&buffer); |
| | | } |
| | | cvShowImage(buff, disp); |
| | | cvReleaseImage(&disp); |
| | | } |
| | | #endif |
| | | |
| | | void save_image(image p, char *name) |
| | | void show_image(image p, char *name) |
| | | { |
| | | #ifdef OPENCV |
| | | show_image_cv(p, name); |
| | | #else |
| | | fprintf(stderr, "Not compiled with OpenCV, saving to %s.png instead\n", name); |
| | | save_image(p, name); |
| | | #endif |
| | | } |
| | | |
| | | void save_image(image im, char *name) |
| | | { |
| | | char buff[256]; |
| | | //sprintf(buff, "%s (%d)", name, windows); |
| | | 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 = stbi_write_png(buff, im.w, im.h, im.c, data, im.w*im.c); |
| | | if(!success) fprintf(stderr, "Failed to write image %s\n", buff); |
| | | } |
| | | |
| | | /* |
| | | void save_image_cv(image p, char *name) |
| | | { |
| | | int x,y,k; |
| | | image copy = copy_image(p); |
| | | normalize_image(copy); |
| | | //normalize_image(copy); |
| | | |
| | | char buff[256]; |
| | | //sprintf(buff, "%s (%d)", name, windows); |
| | |
| | | cvSaveImage(buff, disp,0); |
| | | cvReleaseImage(&disp); |
| | | } |
| | | */ |
| | | |
| | | void show_image_layers(image p, char *name) |
| | | { |
| | |
| | | for(i = 0; i < m.h*m.w*m.c; ++i) m.data[i] *= s; |
| | | } |
| | | |
| | | image ipl_to_image(IplImage* src) |
| | | { |
| | | unsigned char *data = (unsigned char *)src->imageData; |
| | | int h = src->height; |
| | | int w = src->width; |
| | | int c = src->nChannels; |
| | | int step = src->widthStep; |
| | | image out = make_image(w, h, c); |
| | | int i, j, k, count=0;; |
| | | |
| | | for(k= 0; k < c; ++k){ |
| | | for(i = 0; i < h; ++i){ |
| | | for(j = 0; j < w; ++j){ |
| | | out.data[count++] = data[i*step + j*c + k]; |
| | | } |
| | | } |
| | | } |
| | | return out; |
| | | } |
| | | |
| | | image crop_image(image im, int dx, int dy, int w, int h) |
| | | { |
| | | image cropped = make_image(w, h, im.c); |
| | |
| | | for(i = 0; i < w; ++i){ |
| | | int r = j + dy; |
| | | int c = i + dx; |
| | | float val = 128; |
| | | float val = 0; |
| | | if (r >= 0 && r < im.h && c >= 0 && c < im.w) { |
| | | val = get_pixel(im, c, r, k); |
| | | } |
| | |
| | | return cropped; |
| | | } |
| | | |
| | | 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) ; |
| | | } |
| | | |
| | | // http://www.cs.rit.edu/~ncs/color/t_convert.html |
| | | void rgb_to_hsv(image im) |
| | | { |
| | | assert(im.c == 3); |
| | | int i, j; |
| | | float r, g, b; |
| | | float h, s, v; |
| | | for(j = 0; j < im.h; ++j){ |
| | | for(i = 0; i < im.w; ++i){ |
| | | r = get_pixel(im, i , j, 0); |
| | | g = get_pixel(im, i , j, 1); |
| | | b = get_pixel(im, i , j, 2); |
| | | float max = three_way_max(r,g,b); |
| | | float min = three_way_min(r,g,b); |
| | | float delta = max - min; |
| | | v = max; |
| | | if(max == 0){ |
| | | s = 0; |
| | | h = -1; |
| | | }else{ |
| | | s = delta/max; |
| | | if(r == max){ |
| | | h = (g - b) / delta; |
| | | } else if (g == max) { |
| | | h = 2 + (b - r) / delta; |
| | | } else { |
| | | h = 4 + (r - g) / delta; |
| | | } |
| | | if (h < 0) h += 6; |
| | | } |
| | | set_pixel(im, i, j, 0, h); |
| | | set_pixel(im, i, j, 1, s); |
| | | set_pixel(im, i, j, 2, v); |
| | | } |
| | | } |
| | | } |
| | | |
| | | void hsv_to_rgb(image im) |
| | | { |
| | | assert(im.c == 3); |
| | | int i, j; |
| | | float r, g, b; |
| | | float h, s, v; |
| | | float f, p, q, t; |
| | | for(j = 0; j < im.h; ++j){ |
| | | for(i = 0; i < im.w; ++i){ |
| | | h = get_pixel(im, i , j, 0); |
| | | s = get_pixel(im, i , j, 1); |
| | | v = get_pixel(im, i , j, 2); |
| | | if (s == 0) { |
| | | r = g = b = v; |
| | | } else { |
| | | int index = floor(h); |
| | | f = h - index; |
| | | p = v*(1-s); |
| | | q = v*(1-s*f); |
| | | t = v*(1-s*(1-f)); |
| | | if(index == 0){ |
| | | r = v; g = t; b = p; |
| | | } else if(index == 1){ |
| | | r = q; g = v; b = p; |
| | | } else if(index == 2){ |
| | | r = p; g = v; b = t; |
| | | } else if(index == 3){ |
| | | r = p; g = q; b = v; |
| | | } else if(index == 4){ |
| | | r = t; g = p; b = v; |
| | | } else { |
| | | r = v; g = p; b = q; |
| | | } |
| | | } |
| | | set_pixel(im, i, j, 0, r); |
| | | set_pixel(im, i, j, 1, g); |
| | | set_pixel(im, i, j, 2, b); |
| | | } |
| | | } |
| | | } |
| | | |
| | | image grayscale_image(image im) |
| | | { |
| | | assert(im.c == 3); |
| | | int i, j, k; |
| | | image gray = make_image(im.w, im.h, im.c); |
| | | float scale[] = {0.587, 0.299, 0.114}; |
| | | for(k = 0; k < im.c; ++k){ |
| | | for(j = 0; j < im.h; ++j){ |
| | | for(i = 0; i < im.w; ++i){ |
| | | gray.data[i+im.w*j] += scale[k]*get_pixel(im, i, j, k); |
| | | } |
| | | } |
| | | } |
| | | memcpy(gray.data + im.w*im.h*1, gray.data, sizeof(float)*im.w*im.h); |
| | | memcpy(gray.data + im.w*im.h*2, gray.data, sizeof(float)*im.w*im.h); |
| | | return gray; |
| | | } |
| | | |
| | | image blend_image(image fore, image back, float alpha) |
| | | { |
| | | assert(fore.w == back.w && fore.h == back.h && fore.c == back.c); |
| | | image blend = make_image(fore.w, fore.h, fore.c); |
| | | int i, j, k; |
| | | for(k = 0; k < fore.c; ++k){ |
| | | for(j = 0; j < fore.h; ++j){ |
| | | for(i = 0; i < fore.w; ++i){ |
| | | float val = alpha * get_pixel(fore, i, j, k) + |
| | | (1 - alpha)* get_pixel(back, i, j, k); |
| | | set_pixel(blend, i, j, k, val); |
| | | } |
| | | } |
| | | } |
| | | return blend; |
| | | } |
| | | |
| | | void scale_image_channel(image im, int c, float v) |
| | | { |
| | | int i, j; |
| | | for(j = 0; j < im.h; ++j){ |
| | | for(i = 0; i < im.w; ++i){ |
| | | float pix = get_pixel(im, i, j, c); |
| | | pix = pix*v; |
| | | set_pixel(im, i, j, c, pix); |
| | | } |
| | | } |
| | | } |
| | | |
| | | void saturate_image(image im, float sat) |
| | | { |
| | | rgb_to_hsv(im); |
| | | scale_image_channel(im, 1, sat); |
| | | hsv_to_rgb(im); |
| | | constrain_image(im); |
| | | } |
| | | |
| | | void exposure_image(image im, float sat) |
| | | { |
| | | rgb_to_hsv(im); |
| | | scale_image_channel(im, 2, sat); |
| | | hsv_to_rgb(im); |
| | | constrain_image(im); |
| | | } |
| | | |
| | | void saturate_exposure_image(image im, float sat, float exposure) |
| | | { |
| | | rgb_to_hsv(im); |
| | | scale_image_channel(im, 1, sat); |
| | | scale_image_channel(im, 2, exposure); |
| | | hsv_to_rgb(im); |
| | | constrain_image(im); |
| | | } |
| | | |
| | | /* |
| | | image saturate_image(image im, float sat) |
| | | { |
| | | image gray = grayscale_image(im); |
| | | image blend = blend_image(im, gray, sat); |
| | | free_image(gray); |
| | | constrain_image(blend); |
| | | return blend; |
| | | } |
| | | |
| | | image brightness_image(image im, float b) |
| | | { |
| | | image bright = make_image(im.w, im.h, im.c); |
| | | return bright; |
| | | } |
| | | */ |
| | | |
| | | float billinear_interpolate(image im, float x, float y, int c) |
| | | { |
| | | int ix = (int) floorf(x); |
| | |
| | | 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); |
| | | 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 test_resize(char *filename) |
| | | { |
| | | image im = load_image(filename, 0,0); |
| | | translate_image(im, -128); |
| | | image small = resize_image(im, 65, 63); |
| | | image big = resize_image(im, 513, 512); |
| | | image crop = crop_image(im, 50, 10, 100, 100); |
| | | image crop2 = crop_image(im, -30, -50, 291, 400); |
| | | image rot = rotate_image(big, .02); |
| | | image rot2 = rotate_image(big, 3.14159265/2.); |
| | | image test = rotate_image(im, .6); |
| | | image im = load_image(filename, 0,0, 3); |
| | | image gray = grayscale_image(im); |
| | | |
| | | image sat2 = copy_image(im); |
| | | saturate_image(sat2, 2); |
| | | |
| | | image sat5 = copy_image(im); |
| | | saturate_image(sat5, 5); |
| | | |
| | | image sat10 = copy_image(im); |
| | | saturate_image(sat10, 10); |
| | | |
| | | image exp2 = copy_image(im); |
| | | saturate_image(exp2, .5); |
| | | exposure_image(exp2, 2); |
| | | |
| | | image exp5 = copy_image(im); |
| | | saturate_image(exp5, .5); |
| | | exposure_image(exp5, .5); |
| | | |
| | | show_image(im, "original"); |
| | | show_image(small, "smaller"); |
| | | show_image(big, "bigger"); |
| | | show_image(crop, "crop"); |
| | | show_image(crop2, "crop2"); |
| | | show_image(rot, "rot"); |
| | | show_image(rot2, "rot2"); |
| | | show_image(test, "test"); |
| | | show_image(gray, "gray"); |
| | | show_image(sat2, "sat2"); |
| | | show_image(sat5, "sat5"); |
| | | show_image(sat10, "sat10"); |
| | | /* |
| | | show_image(small, "smaller"); |
| | | show_image(big, "bigger"); |
| | | show_image(crop, "crop"); |
| | | show_image(crop2, "crop2"); |
| | | show_image(rot, "rot"); |
| | | show_image(rot2, "rot2"); |
| | | show_image(test, "test"); |
| | | */ |
| | | #ifdef OPENCV |
| | | cvWaitKey(0); |
| | | #endif |
| | | } |
| | | |
| | | #ifdef OPENCV |
| | | image ipl_to_image(IplImage* src) |
| | | { |
| | | unsigned char *data = (unsigned char *)src->imageData; |
| | | int h = src->height; |
| | | int w = src->width; |
| | | int c = src->nChannels; |
| | | int step = src->widthStep; |
| | | image out = make_image(w, h, c); |
| | | int i, j, k, count=0;; |
| | | |
| | | for(k= 0; k < c; ++k){ |
| | | for(i = 0; i < h; ++i){ |
| | | for(j = 0; j < w; ++j){ |
| | | out.data[count++] = data[i*step + j*c + k]/255.; |
| | | } |
| | | } |
| | | } |
| | | return out; |
| | | } |
| | | |
| | | image load_image_cv(char *filename, int channels) |
| | | { |
| | | IplImage* src = 0; |
| | | int flag = -1; |
| | | if (channels == 0) flag = -1; |
| | | else if (channels == 1) flag = 0; |
| | | else if (channels == 3) flag = 1; |
| | | else { |
| | | fprintf(stderr, "OpenCV can't force load with %d channels\n", channels); |
| | | } |
| | | |
| | | if( (src = cvLoadImage(filename, flag)) == 0 ) |
| | | { |
| | | printf("Cannot load file image %s\n", filename); |
| | | exit(0); |
| | | } |
| | | image out = ipl_to_image(src); |
| | | cvReleaseImage(&src); |
| | | rgbgr_image(out); |
| | | return out; |
| | | } |
| | | |
| | | #endif |
| | | |
| | | |
| | | image load_image_stb(char *filename, int channels) |
| | | { |
| | | int w, h, c; |
| | | unsigned char *data = stbi_load(filename, &w, &h, &c, channels); |
| | | if (!data) { |
| | | printf("Cannot load file image %s\n", filename); |
| | | exit(0); |
| | | } |
| | | if(channels) c = channels; |
| | | int i,j,k; |
| | | image im = make_image(w, h, c); |
| | | for(k = 0; k < c; ++k){ |
| | | for(j = 0; j < h; ++j){ |
| | | for(i = 0; i < w; ++i){ |
| | | int dst_index = i + w*j + w*h*k; |
| | | int src_index = k + c*i + c*w*j; |
| | | im.data[dst_index] = (float)data[src_index]/255.; |
| | | } |
| | | } |
| | | } |
| | | free(data); |
| | | return im; |
| | | } |
| | | |
| | | image load_image(char *filename, int w, int h, int c) |
| | | { |
| | | #ifdef OPENCV |
| | | image out = load_image_cv(filename, c); |
| | | #else |
| | | image out = load_image_stb(filename, c); |
| | | #endif |
| | | |
| | | if((h && w) && (h != out.h || w != out.w)){ |
| | | image resized = resize_image(out, w, h); |
| | | free_image(out); |
| | | out = resized; |
| | | } |
| | | return out; |
| | | } |
| | | |
| | | image load_image_color(char *filename, int w, int h) |
| | | { |
| | | IplImage* src = 0; |
| | | if( (src = cvLoadImage(filename, 1)) == 0 ) |
| | | { |
| | | printf("Cannot load file image %s\n", filename); |
| | | exit(0); |
| | | } |
| | | image out = ipl_to_image(src); |
| | | if((h && w) && (h != out.h || w != out.w)){ |
| | | image resized = resize_image(out, w, h); |
| | | free_image(out); |
| | | out = resized; |
| | | } |
| | | cvReleaseImage(&src); |
| | | return out; |
| | | } |
| | | |
| | | image load_image(char *filename, int w, int h) |
| | | { |
| | | IplImage* src = 0; |
| | | if( (src = cvLoadImage(filename,-1)) == 0 ) |
| | | { |
| | | printf("Cannot load file image %s\n", filename); |
| | | exit(0); |
| | | } |
| | | image out = ipl_to_image(src); |
| | | if((h && w) && (h != out.h || w != out.w)){ |
| | | image resized = resize_image(out, w, h); |
| | | free_image(out); |
| | | out = resized; |
| | | } |
| | | cvReleaseImage(&src); |
| | | return out; |
| | | return load_image(filename, w, h, 3); |
| | | } |
| | | |
| | | image get_image_layer(image m, int l) |