import?cv2
import?numpy?as?np
from?numpy.linalg?import?norm
import?sys
import?os
import?json
from?matplotlib?import?pyplot?as?plt

SZ?=?20??#?訓(xùn)練圖片長寬
MAX_WIDTH?=?1000??#?原始圖片最大寬度
Min_Area?=?2000??#?車牌區(qū)域允許最大面積
PROVINCE_START?=?1000


#?讀取圖片文件
def?imreadex（filename）:
????return?cv2.imdecode（np.fromfile（filename?dtype=np.uint8）?cv2.IMREAD_COLOR）


def?point_limit（point）:
????if?point[0]?????????point[0]?=?0
????if?point[1]?????????point[1]?=?0

#?根據(jù)設(shè)定的閾值和圖片直方圖，找出波峰，用于分隔字符
def?find_waves（threshold?histogram）:
????up_point?=?-1??#?上升點
????is_peak?=?False
????if?histogram[0]?>?threshold:
????????up_point?=?0
????????is_peak?=?True
????wave_peaks?=?[]
????for?i?x?in?enumerate（histogram）:
????????if?is_peak?and?x?????????????if?i?-?up_point?>?2:
????????????????is_peak?=?False
????????????????wave_peaks.append（（up_point?i））
????????elif?not?is_peak?and?x?>=?threshold:
????????????is_peak?=?True
????????????up_point?=?i
????if?is_peak?and?up_point?!=?-1?and?i?-?up_point?>?4:
????????wave_peaks.append（（up_point?i））
????return?wave_peaks


#?根據(jù)找出的波峰，分隔圖片，從而得到逐個字符圖片
def?seperate_card（img?waves）:
????part_cards?=?[]
????for?wave?in?waves:
????????part_cards.append（img[:?wave[0]:wave[1]]）
????return?part_cards


#?來自opencv的sample，用于svm訓(xùn)練
def?deskew（img）:
????m?=?cv2.moments（img）
????if?abs（m[‘mu02‘]）?????????return?img.copy（）
????skew?=?m[‘mu11‘]?/?m[‘mu02‘]
????M?=?np.float32（[[1?skew?-0.5?*?SZ?*?skew]?[0?1?0]]）
????img?=?cv2.warpAffine（img?M?（SZ?SZ）?flags=cv2.WARP_INVERSE_MAP?|?cv2.INTER_LINEAR）
????return?img


#?來自opencv的sample，用于svm訓(xùn)練
def?preprocess_hog（digits）:
????samples?=?[]
????for?img?in?digits:
????????gx?=?cv2.Sobel（img?cv2.CV_32F?1?0）
????????gy?=?cv2.Sobel（img?cv2.CV_32F?0?1）
????????mag?ang?=?cv2.cartToPolar（gx?gy）
????????bin_n?=?16
????????bin?=?np.int32（bin_n?*?ang?/?（2?*?np.pi））
????????bin_cells?=?bin[:10?:10]?bin[10:?:10]?bin[:10?10:]?bin[10:?10:]
????????mag_cells?=?mag[:10?:10]?mag[10:?:10]?mag[:10?10:]?mag[10:?10:]
????????hists?=?[np.bincount（b.ravel（）?m.ravel（）?bin_n）?for?b?m?in?zip（bin_cells?mag_cells）]
????????hist?=?np.hstack（hists）

????????#?transform?to?Hellinger?kernel
????????eps?=?1e-7
????????hist?/=?hist.sum（）?+?eps
????????hist?=?np.sqrt（hist）
????????hist?/=?norm（hist）?+?eps

????????samples.append（hist）
????return?np.float32（samples）


#?不能保證包括所有省份
provinces?=?[
????“zh_cuan“?“川“
????“zh_e“?“鄂“
????“zh_gan“?“贛“
????“zh_gan1“?“甘“
????“zh_gui“?“貴“
????“zh_gui1“?“桂“
????“zh_hei“?“黑“
????“zh_hu“?“滬“
????“zh_ji“?“冀“
????“zh_jin“?“津“
????“zh_jing“?“京“
????“zh_jl“?“吉“
????“zh_liao“?“遼“
????“zh_lu“?“魯“
????“zh_meng“?“蒙“
????“zh_min“?“閩“
????“zh_ning“?“寧“
????“zh_qing“?“靑“
????“zh_qiong“?“瓊“
????“zh_shan“?“陜“
????“zh_su“?“蘇“
????“zh_sx“?“晉“
????“zh_wan“?“皖“
????“zh_xiang“?“湘“
????“zh_xin“?“新“
????“zh_yu“?“豫“
????“zh_yu1“?“渝“
????“zh_yue“?“粵“
????“zh_yun“?“云“
????“zh_zang“?“藏“
????“zh_zhe“?“浙“
]

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2019-03-12?19:03??carLicense_recongnition\
?????文件?????3645216??2018-05-26?07:39??carLicense_recongnition\svmchinese.dat
?????目錄???????????0??2019-03-12?19:03??carLicense_recongnition\.idea\
?????文件????????9907??2019-03-12?19:01??carLicense_recongnition\.idea\workspace.xml
?????文件?????????499??2019-03-04?17:25??carLicense_recongnition\.idea\carLicense_recongnition.iml
?????文件?????????298??2019-03-04?17:25??carLicense_recongnition\.idea\modules.xml
?????文件?????????135??2019-03-04?17:25??carLicense_recongnition\.idea\encodings.xml
?????文件?????????185??2019-03-04?17:25??carLicense_recongnition\.idea\misc.xml
?????文件?????4595678??2018-05-26?07:39??carLicense_recongnition\svm.dat
?????文件???????20971??2019-03-12?19:01??carLicense_recongnition\predict.py
?????目錄???????????0??2019-03-12?19:03??carLicense_recongnition\__pycache__\
?????文件???????12551??2019-03-12?17:33??carLicense_recongnition\__pycache__\predict.cpython-37.pyc
?????目錄???????????0??2019-03-12?19:03??carLicense_recongnition\test\
?????文件???????52515??2018-05-26?07:39??carLicense_recongnition\test\wA87271.jpg
?????文件??????141788??2018-05-26?07:39??carLicense_recongnition\test\wAUB816.jpg
?????文件??????116063??2018-05-26?07:39??carLicense_recongnition\test\wATH859.jpg
?????文件???????24073??2018-05-26?07:39??carLicense_recongnition\test\lLD9016.jpg
?????文件?????4543569??2018-05-26?07:39??carLicense_recongnition\test\1.jpg
?????文件???????28604??2018-05-26?07:39??carLicense_recongnition\test\car5.jpg
?????文件???????27744??2018-05-26?07:39??carLicense_recongnition\test\car7.jpg
?????文件?????2718121??2018-05-26?07:39??carLicense_recongnition\test\2.jpg
?????文件???????62588??2018-05-26?07:39??carLicense_recongnition\test\cAA662F.jpg
?????文件???????27089??2018-05-26?07:39??carLicense_recongnition\test\car3.jpg
?????文件???????25090??2018-05-26?07:39??carLicense_recongnition\test\car4.jpg
?????目錄???????????0??2019-03-12?19:03??carLicense_recongnition\train\
?????文件?????3336217??2018-05-26?07:39??carLicense_recongnition\train\chars2.7z
?????文件?????1099009??2018-05-26?07:39??carLicense_recongnition\train\charsChinese.7z
?????文件????????4038??2019-03-12?17:07??carLicense_recongnition\window.py
?????文件?????????262??2018-05-26?07:39??carLicense_recongnition\config.js