这个应该可以了提供存储在Images文件夹中的图像。
基本上你必须传递png图像作为<img>属性。然后将字符串显示为html，即add_footnote(..., escape = F)。

library(kableExtra)
library(dplyr)
library(glue)
# Create example data 
data <- data.frame(
  Category = c("Toyota", "Honda", "Ford", "Nissan"),
  Count = c(50, 60, 45, 55),
  Minimum = c(100, 110, 95, 105),
  Maximum = c(200, 210, 195, 205)
)
footnote_text <- c(
  "Decreasing < -5%)",
  "Slightly Decreasing -5 to -1%",
  "Stagnant -1 to +1%",
  "Slightly Increasing +1 to +5%",
  "Increasing > +5%"
)
footnote_png_paths <- c(
  "Images/arrow_down.png",
  "Images/arrow_right_down.png",
  "Images/arrow_right.png",
  "Images/arrow_right_up.png",
  "Images/arrow_up.png"
)
display_annotation <- function(width = "20px", height = "20px") {
  glue_collapse(sapply(1:length(footnote_text), function(x) glue('{footnote_text[x]} <img src="{footnote_png_paths[x]}" alt="" width="{width}" height="{height}">')), '<br>')
  
}
# Create the table with adjusted column names
table <- kbl(data, booktabs = TRUE, col.names = c("Category", "Count", "Min", "Max")) %>%
  kable_styling(latex_options = c("striped"), font_size = 10, position = "center") %>%
  add_header_above(c(" " = 1, "(n)" = 1, "in Dollars" = 2)) %>%
  add_header_above(c(" " = 1, "Count" = 1, "Values" = 2))%>%
  add_footnote(display_annotation(), notation = "symbol", escape = F)
# Display the table
table