Image Text OCR

Extract text from an image using the tesseract package.

Usage

image_ocr(image, language = "eng", HOCR = FALSE, ...)

image_ocr_data(image, language = "eng", ...)

Arguments

image

magick image object returned by image_read() or image_graph()

language

passed to tesseract. To install additional languages see instructions in tesseract_download().

HOCR

if TRUE return results as HOCR xml instead of plain text

...

additional parameters passed to tesseract

Details

To use this function you need to tesseract first:

  install.packages("tesseract")

Best results are obtained if you set the correct language in tesseract. To install additional languages see instructions in tesseract_download().

See also

Other image: _index_, analysis, animation, attributes(), color, composite, defines, device, edges, editing, effects(), fx, geometry, morphology, options(), painting, segmentation, transform(), video

Examples

# \donttest{
if(require("tesseract")){
img <- image_read("http://jeroen.github.io/images/testocr.png")
image_ocr(img)
image_ocr_data(img)
}
#> Loading required package: tesseract
#> # A tibble: 60 × 3
#>    word  confidence bbox          
#>    <chr>      <dbl> <chr>         
#>  1 This        96.8 36,92,96,116  
#>  2 is          96.9 109,92,129,116
#>  3 a           95.0 141,98,156,116
#>  4 lot         95.0 169,92,201,116
#>  5 of          96.4 212,92,240,116
#>  6 12          96.4 251,92,282,116
#>  7 point       96.3 296,92,364,122
#>  8 text        96.2 374,93,427,116
#>  9 to          97.0 437,93,463,116
#> 10 test        97.0 474,93,526,116
#> # ℹ 50 more rows
# }