Created
May 5, 2020 18:39
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library(magick) | |
library(hocr) | |
library(bunny) | |
library(bbx) | |
library(dplyr) | |
img <- image_read("https://pbs.twimg.com/media/EXKzsiAWoAYH9Pv?format=png") | |
img_bw <- img %>% | |
image_threshold("white", threshold = "5%") %>% | |
image_convert(type = "Grayscale") %>% | |
image_morphology("Open") %>% | |
image_negate() | |
bbox_df <- img_bw %>% | |
image_ocr(HOCR = TRUE) %>% | |
hocr_parse() %>% | |
tidy_tesseract() | |
bb <- bbox_df %>% | |
slice(1) %>% | |
pull(ocrx_word_bbox) | |
img_ltr_slots<- image_crop(img_bw, geometry = bbx_to_geometry(bb)) %>% | |
image_morphology("HMT", paste0("Rectangle:1x",bbx_h(bb))) %>% | |
image_morphology("Thinning", "ThinSe") | |
## hough line method | |
ii <- image_info(img_ltr_slots) | |
iiw <- ii$width | |
iih <- ii$height | |
img_ltr_slots %>% | |
image_hough_txt(geometry=paste0("1x1+", iih)) %>% | |
bunny::tidy_hough_mvg() %>% | |
.[["lines_data"]] %>% | |
filter(line_angle==0) %>% | |
pull(line_bbox) %>% | |
bbx_to_bbm() %>% | |
{rbind(matrix(c(0,0,0,0), nrow = 1),., | |
matrix(c(iiw, iih, iiw, iih), nrow=1))} %>% | |
{mapply(function(i, f) f(.[,i],-1), seq(ncol(.)), | |
list(head, head, tail, tail))} %>% | |
bbm_to_bbx() %>% | |
bbx_translate(bbx_to_geometry(bb)) %>% | |
bbx_pad_width(side="right") %>% | |
bbx_to_geometry() %>% | |
lapply(function(x)image_crop(img_bw, x)) %>% | |
{Reduce(c,.)} %>% | |
image_scale("300%") %>% | |
image_animate(delay=50) %>% | |
image_write_gif("coolbutuseless_arcadefont.gif") | |
Author
dmi3kno
commented
May 5, 2020
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