ManejoAlHombro

appcelerator.js

function _openCamera() {
	Titanium.Media.showCamera({
		success : function(event) {
			if (event.mediaType == Ti.Media.MEDIA_TYPE_PHOTO) {
				_uploadReport(event.media);
			} else {
				alert("No es una imagen =" + event.mediaType);
			}
		},
		error : function(error) {
			var a = Titanium.UI.createAlertDialog({
				title : 'Camera'
			});
			a.setMessage('Error: ' + error.code);
			a.show();
		},
		saveToPhotoGallery : true,
		allowEditing : true,
		mediaTypes : [Ti.Media.MEDIA_TYPE_PHOTO]
	});
}

function _openGallery() {
	Ti.Media.openPhotoGallery({
		success : function(event) {
			if (event.mediaType == Ti.Media.MEDIA_TYPE_PHOTO) {
				_uploadReport(event.media);
			} else {
				alert("No es una imagen =" + event.mediaType);
			}
		},
		error : function(error) {
			var a = Titanium.UI.createAlertDialog({
				title : 'Camera'
			});
			a.setMessage('Unexpected error: ' + error.code);
			a.show();
		},
		allowEditing : true,
		allowMultiple : false,
		mediaTypes : [Ti.Media.MEDIA_TYPE_PHOTO]
	});
}

openalpr.rb

class OpenAlpr
  attr_reader :output, :command

  def initialize(file)
    @file = file
    @output = []

    begin
      @output = JSON.parse(processPhoto(file))
    rescue JSON::ParserError
      @output = nil
    end
  end

  private
  def processPhoto(file)
    @command = "alpr -j -n 10 -c pa -p pa #{Shellwords.shellescape file}"
    `#{@command}`
  end
end

pa.conf

; 30-50, 40-60, 50-70, 60-80
char_analysis_min_pct = 0.30
char_analysis_height_range = 0.20
char_analysis_height_step_size = 0.10
char_analysis_height_num_steps = 4

segmentation_min_speckle_height_percent = 0.3
segmentation_min_box_width_px = 4
segmentation_min_charheight_percent = 0.5;
segmentation_max_segment_width_percent_vs_average = 1.35;

plate_width_mm = 304.8
plate_height_mm = 152.4

multiline = 0

char_height_mm = 70
char_width_mm = 35
char_whitespace_top_mm = 38
char_whitespace_bot_mm = 38

template_max_width_px = 120
template_max_height_px = 60

; Higher sensitivity means less lines
plateline_sensitivity_vertical = 25
plateline_sensitivity_horizontal = 45

; Regions smaller than this will be disqualified
min_plate_size_width_px = 70
min_plate_size_height_px = 35

; Results with fewer or more characters will be discarded
postprocess_min_characters = 5
postprocess_max_characters = 7

detector_file = us.xml

ocr_language = lus

; Override for postprocess letters/numbers regex.
postprocess_regex_letters = [A-Z]
postprocess_regex_numbers = [0-9]

; Whether the plate is always dark letters on light background, light letters on dark background, or both
; value can be either always, never, or auto
invert = auto

pa.patterns

pa      @@#### // <- las placas nuevas, ej.: AB1234. Aplica también para Metro Bus, ej.: MB0000
pa      ###### // <- las placas anteriores, ej.: 123456
pa      @##### // <- las placas de Taxi, ej.: T12345
pa      #@@##### // <- las placas de Taxi de Ruta Interna, ej.: 8RI12345

sinatra.rb

  # ...
  if params[:photo]
    # Get the filename
    @filename = params[:photo][:filename]

    # Write it locally
    File.open("public/photos/#{@filename}", "w") do |f|
      f.write(params[:photo][:tempfile].read)
    end

    # Analyze it with openalpr
    @search = OpenAlpr.new("public/photos/#{@filename}")
  end

  # Validate if openalpr returns values
  if @search && @search.output && @search.output['results'].size > 0
    # Get the better result
    @result = @search.output['results'].first

    # Get the coordinates for this result (the best)
    coordinates = @result['coordinates']
    first_coordinate = coordinates.first
    third_coordinate = coordinates[2]

  # ...