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September 22, 2018 00:20
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############################################################## | |
# V2 = use bounding box information to weight words in OCR | |
## add imagehash to dedup | |
############################################## | |
## common functions | |
############################################## | |
import logging, os, re | |
import pandas as pd | |
import collections, struct, pickle, json, re | |
from ast import literal_eval | |
from tqdm import tqdm | |
from io import open | |
from os.path import join | |
from multiprocessing import Pool | |
from math import sqrt, log | |
from sklearn.feature_extraction.text import CountVectorizer, TfidfTransformer | |
from sklearn.preprocessing import normalize | |
from scipy.sparse import vstack | |
import argparse | |
def ocrCleanup(OCRstring, minWordLen=3): | |
""" remove non alphabet/ numbers chars""" | |
clean = re.sub('[^a-zA-Z1-9]+', ' ', str(OCRstring)) | |
clean = [w for w in clean.split() if len(w)>=minWordLen] | |
clean = ' '.join(clean) | |
return clean.lower() | |
def extractWordROIs(OCR, WordROIs): | |
OCR = OCR.split('#N#') | |
Words = [w for OCRline in OCR for w in OCRline.split(' ')] | |
WordROIs = list(map(float, WordROIs.split(','))) | |
OCRjson = [] | |
for wordIdx in range(len(Words)): | |
WordROI = WordROIs[wordIdx*8 : (wordIdx+1)*8] | |
WordBB = { "Words": | |
[{ "Text": Words[wordIdx], | |
"BoundingBox": { | |
"TopLeft": {"X":WordROI[0], "Y":WordROI[1]}, | |
"TopRight": {"X":WordROI[2], "Y":WordROI[3]}, | |
"BottomRight": {"X":WordROI[4], "Y":WordROI[5]}, | |
"BottomLeft": {"X":WordROI[6], "Y":WordROI[7]} | |
} | |
}] | |
} | |
OCRjson.append(WordBB) | |
return OCRjson | |
def calculateWidthHeight(w): | |
edges = [ | |
sqrt((w['BoundingBox']['BottomLeft']['X'] - w['BoundingBox']['BottomRight']['X']) ** 2 + (w['BoundingBox']['BottomLeft']['Y'] - w['BoundingBox']['BottomRight']['Y']) ** 2), | |
sqrt((w['BoundingBox']['TopRight']['X'] - w['BoundingBox']['BottomRight']['X']) ** 2 + (w['BoundingBox']['TopRight']['Y'] - w['BoundingBox']['BottomRight']['Y']) ** 2), | |
sqrt((w['BoundingBox']['TopRight']['X'] - w['BoundingBox']['TopLeft']['X']) ** 2 + (w['BoundingBox']['TopRight']['Y'] - w['BoundingBox']['TopLeft']['Y']) ** 2), | |
sqrt((w['BoundingBox']['TopLeft']['X'] - w['BoundingBox']['BottomLeft']['X']) ** 2 + (w['BoundingBox']['TopLeft']['Y'] - w['BoundingBox']['BottomLeft']['Y']) ** 2) | |
] | |
width = max(edges) | |
height = min(edges) | |
return width, height | |
def parseOcrRecord(ocrJson): | |
words = [ y for x in ocrJson for y in x['Words'] ] | |
words = [ { 'text': w['Text'], | |
'wh': calculateWidthHeight(w) } for w in words ] | |
words = [ {'text': w['text'], 'w': w['wh'][0], 'h': w['wh'][1], 'area': w['wh'][0] * w['wh'][1] } for w in words ] | |
return words | |
def getNormalizedWeights(words): | |
sumArea = sum([ sqrt(w['h']) for w in words ]) | |
weights = [ sqrt(w['h']) / sumArea for w in words ] | |
texts = [w['text'] for w in words] | |
return list(zip(texts, weights)) | |
#weightedTf = sum([ f * w for f, w in zip(wordsTf, weights) ]) | |
import mmap | |
def getNumLines(file_path): | |
fp = open(file_path, "r+") | |
buf = mmap.mmap(fp.fileno(), 0) | |
lines = 0 | |
while buf.readline(): | |
lines += 1 | |
return lines | |
#getNumLines(OCR_WEIGHTS_FN) | |
idxSources = ['OCR', 'ProductTitle', 'ProductTitle_and_OCR'] | |
### READ Weights | |
def getWeightedTfIdfV3(words_w_weights, normMethod=None): | |
try: | |
if len(words_w_weights) == 0: | |
return tfidf_transformer.transform(count_vect.transform([ '' ])) | |
wordsTf = count_vect.transform([ w[0] for w in words_w_weights]) | |
weights = [w[1] for w in words_w_weights] | |
weightedTf = sum([ f * w for f, w in zip(wordsTf, weights)]) | |
# get sublinear value of Tf | |
tfs = sum(wordsTf) | |
sublinearTfs = tfs.data.astype(float) | |
sublinearTfs += 1 | |
# scale factor between tf and sublinear tf. | |
weightedTf.data *= sublinearTfs | |
weightedTf.data /= tfs.data | |
textFeature = tfidf_transformer.transform(weightedTf) | |
if normMethod: | |
textFeature = normalize(textFeatures, norm=normMethod, axis = 1) | |
return textFeature | |
except Exception as e: | |
print(e) | |
def runPipeline(line, normMethod=None): | |
MurlKey, MD5String, ProductTitle, OCR, LineROIs, WordROIs = line.strip('\n').split('\t') | |
ocrJson = extractWordROIs(OCR, WordROIs) | |
words = parseOcrRecord(ocrJson) | |
words_w_weights = getNormalizedWeights(words) | |
words_w_weights = [(ocrCleanup(w[0]), w[1]) for w in words_w_weights if ocrCleanup(w[0])] | |
return getWeightedTfIdfV3(words_w_weights, normMethod) | |
def getTextFeaturesMultiprocessor(lines): | |
res = [] | |
for line in tqdm(lines, total=len(lines)): | |
res.append(runPipeline(line)) | |
# list(map(runPipeline, lines)) | |
return res | |
def linspace(lower, upper, length): | |
return [int(lower + x*(upper-lower)/length) for x in range(length+1)] | |
########################################################################### | |
# load processed counter vector | |
########################################################################### | |
idxSource = idxSources[2] | |
TFIDF_FN = '{}_tfidf_3gram.pickle'.format(idxSource) | |
numProcessor = 64 | |
normMethod = 'l1' | |
DAT_DIR = "F:\\sechangc\\shoppingProducts\\dat\\" | |
#DAT_DIR = '\\\\ccpiu02\shoppingProducts\\dat\\' | |
os.chdir(DAT_DIR) | |
# TEST SMALL DATASET | |
#OCR_FN = 'FashionIndex_TriggeredList_Title_OCR_bb_50k_test2.tsv' | |
#TFIDF_WEIGHTED_FN = 'tfidf_3gram_weighted_norm_test.pickle' | |
#OCR_WEIGHTS_FN = 'FashionIndex_TriggeredList_Title_OCR_bb_50k_test2_precomputedWeights.tsv' | |
# LARGE DATASET | |
OCR_FN = 'FashionIndex_TriggeredList_Title_OCR_bb_V2_20180927.tsv' | |
TFIDF_WEIGHTED_FN = join(DAT_DIR, '{}_weighted_tfidf_3gram.pickle'.format(idxSource)) | |
#OCR_WEIGHTS_FN = 'FashionIndex_TriggeredList_Title_OCR_bb_V2_20180927_precomputedWeights.tsv' | |
# load count_vect | |
with open(TFIDF_FN, 'rb') as fp: | |
tfidf = pickle.load(fp) | |
count_vect = tfidf['count'] | |
tfidf_transformer = tfidf['tfidf'] | |
if __name__ == '__main__': | |
# prepare to train new tfidf | |
print('start reading the file') | |
#lines = [ x for x in open(OCR_FN, encoding='utf-8') ] | |
lines = [] | |
with open(OCR_FN, encoding='utf-8') as file: | |
for line in tqdm(file, total=getNumLines(OCR_FN)): | |
lines.append(line) | |
print('file read, num of lines', len(lines)) | |
import pdb | |
pdb.set_trace() | |
with Pool(processes=numProcessor) as p: | |
textFeatures = list(tqdm(p.imap(runPipeline, lines), total=len(lines) )) | |
#textFeatures = list(tqdm(pool.map(runPipeline, lines), total=len(lines))) | |
trainTfidf = vstack(textFeatures) | |
print(trainTfidf.shape) | |
print('Vocabulary size in tfidf: {}'.format(trainTfidf.get_shape())) | |
tfidf = { 'count': count_vect, 'tfidf': trainTfidf } | |
with open(TFIDF_WEIGHTED_FN, 'wb') as fp: | |
pickle.dump(tfidf, fp) | |
print('output saves in ', TFIDF_WEIGHTED_FN, ' successfully.' ) |
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