Dimensions of width and height for India

[meghamodi]

In the prep.py file for training for country, the dimensions of width and height are in which units, while using this command
python crop_plates.py --input_dir= --out_dir= --plate_width=190 --plate_height=46(mentioned in mm)

[debihiga]

It does not matter as long as you keep the aspect ratio (line 64)

[alucard079]

File "crop_plates.py", line 34
print "input_dir (%s) doesn't exist"
^
SyntaxError: invalid syntax

what to do if this happens?

[debihiga]

Hi. I suspect you are using Python 3. Have you tried with Python 2?

[alucard079]

@debihiga Thanks, It's okay now, I have run the crop.plates.py the dimensions that being asked was the exact dimension of my plate? in the parameter of this py?

Some of the cropped images doesn't have the exact fit of a plate, is that okay?

[alucard079]

@debihiga
what to use for crop.plates.py dimensions or the argument of this
vs
prep.py or it is the same exact dimensions (or this must be larger than crop.plates.py)

The exact size of our plate number is 390x140 should I use this?

[alucard079]

I'm having a problem with this, I randomly guess the value of template_max_width_px = 163 template_max_height_px = 63 I don't know what to consider about this, would you help me?

`
; 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_speckle_height_percent = 0.3
segmentation_min_box_width_px = 4
segmentation_min_charheight_percent = 0.4;
segmentation_max_segment_width_percent_vs_average = 1.6;

plate_width_mm = 390
plate_height_mm = 140
multiline = 0

char_height_mm = 70
char_width_mm = 35
char_whitespace_top_mm = 22
char_whitespace_bot_mm = 35

template_max_width_px = 163
template_max_height_px = 63

; Higher sensitivity means less lines
plateline_sensitivity_vertical = 22
plateline_sensitivity_horizontal = 50

; Regions smaller than this will be disqualified
min_plate_size_width_px = 85
min_plate_size_height_px = 38

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

ocr_language = lph

; 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
`

[alucard079]

@debihiga in crop_plates.py what was the true definition of --plate_width and --plate_height, I'm getting confused some people their values would measure around one-hundreds.

I'm not sure on what dimensions that the crop_plates.py are looking for, if it's the full plate dimensions or the template dimensions.

in our full plate we have 390x140 in mm

in template, I'm having a trouble what should be my basis to make a measurement with this.