openalpr.conf

[common]

; Specify the path to the runtime data directory, bellow you can see how it is configured to the sample application
runtime_dir = /data/data/com.sandro.openalprsample/runtime_data


ocr_img_size_percent = 1.33333333
state_id_img_size_percent = 2.0

; detection will ignore plates that are too large.  This is a good efficiency technique to use if the
; plates are going to be a fixed distance away from the camera (e.g., you will never see plates that fill
; up the entire image
max_plate_width_percent = 100
max_plate_height_percent = 100

; detection_iteration_increase is the percentage that the LBP frame increases each iteration.
; It must be greater than 1.0.  A value of 1.01 means increase by 1%, 1.10 increases it by 10% each time.
; So a 1% increase would be ~10x slower than 10% to process, but it has a higher chance of landing
; directly on the plate and getting a strong detection
detection_iteration_increase = 1.1

; The minimum detection strength determines how sure the detection algorithm must be before signaling that 
; a plate region exists.  Technically this corresponds to LBP nearest neighbors (e.g., how many detections
; are clustered around the same area).  For example, 2 = very lenient, 9 = very strict.
detection_strictness = 3

; The detection doesn't necessarily need an extremely high resolution image in order to detect plates
; Using a smaller input image should still find the plates and will do it faster
; Tweaking the max_detection_input values will resize the input image if it is larger than these sizes
; max_detection_input_width/height are specified in pixels
max_detection_input_width = 1280
max_detection_input_height = 720

opencl_enabled = 0
multithreading_cores = 1



max_plate_angle_degrees = 15

ocr_min_font_point = 6

; Minimum OCR confidence percent to consider.
postprocess_min_confidence = 65

; Any OCR character lower than this will also add an equally likely
; chance that the character is incorrect and will be skipped.  Value is a confidence percent
postprocess_confidence_skip_level = 80

; Reduces the total permutations to consider for scoring.
postprocess_max_substitutions = 2

; Results with fewer characters will be discarded
postprocess_min_characters = 4
postprocess_max_characters = 8

[debug]
general       = 0
timing        = 0
state_id      = 0
plate_lines   = 0
plate_corners = 0
char_regions  = 0
char_segment  = 0
char_analysis = 0
color_filter  = 0
ocr           = 0
postprocess   = 0
show_images   = 0
pause_on_frame	= 0

;;; Country Specific variables ;;;;

[us]

; 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_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

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

ocr_language = lus

[eu]

; 35-50; 45-60, 55-70, 65-80, 75-90
char_analysis_min_pct = 0.35
char_analysis_height_range = 0.15
char_analysis_height_step_size = 0.10
char_analysis_height_num_steps = 5

segmentation_min_box_width_px = 5
segmentation_min_charheight_percent = 0.4;
segmentation_max_segment_width_percent_vs_average = 2.0;

plate_width_mm = 520
plate_height_mm = 110

char_height_mm = 80
char_width_mm = 53
char_whitespace_top_mm = 10
char_whitespace_bot_mm = 10

template_max_width_px = 184
template_max_height_px = 46

; Higher sensitivity means less lines
plateline_sensitivity_vertical = 18
plateline_sensitivity_horizontal = 55

; Regions smaller than this will be disqualified
min_plate_size_width_px = 100
min_plate_size_height_px = 20

ocr_language = leu