如何在python中将OpenCV图像传递给Tesseract?
给定调用Tesseract的C API并使用ctypes库的Python代码,在选项#1中,Tesseract正在加载图像,它工作正常!问题在于选项#2,当我尝试传递OpenCV加载的图像时,Tesseract返回垃圾:如何在python中将OpenCV图像传递给Tesseract?,python,opencv,numpy,tesseract,Python,Opencv,Numpy,Tesseract,给定调用Tesseract的C API并使用ctypes库的Python代码,在选项#1中,Tesseract正在加载图像,它工作正常!问题在于选项#2,当我尝试传递OpenCV加载的图像时,Tesseract返回垃圾: from ctypes import * import cv2 class API(Structure): _fields_ = [] lang = "eng" ts = cdll.LoadLibrary("c:/Tesseract-OCR/libtesseract
from ctypes import *
import cv2
class API(Structure):
_fields_ = []
lang = "eng"
ts = cdll.LoadLibrary("c:/Tesseract-OCR/libtesseract302.dll")
ts.TessBaseAPICreate.restype = POINTER(API)
api = ts.TessBaseAPICreate()
rc = ts.TessBaseAPIInit3(api, 'c:/Tesseract-OCR/', lang)
##### Option #1
out = ts.TessBaseAPIProcessPages(api, 'c:/Tesseract-OCR/doc/eurotext.tif', None, 0)
print 'Option #1 => ' + string_at(out)
##### Option #2
#TESS_API void TESS_CALL TessBaseAPISetImage(TessBaseAPI* handle, const unsigned char* imagedata, int width, int height,
# int bytes_per_pixel, int bytes_per_line);
im = cv2.imread('c:/Temp/Downloads/test-slim/eurotext.jpg', cv2.COLOR_BGR2GRAY)
c_ubyte_p = POINTER(c_ubyte)
##ts.TessBaseAPISetImage.argtypes = [POINTER(API), c_ubyte_p, c_int, c_int, c_int, c_int]
ts.TessBaseAPISetImage(api, im.ctypes.data_as(c_ubyte_p), 800, 1024, 3, 800 * 3)
out = ts.TessBaseAPIGetUTF8Text(api)
print 'Option #2 => ' + string_at(out)
输出结果如下:
选项#1=>快速[棕色]{fox}跳跃!
超过$43456.78#90的狗
&鸭子/鹅,占电子邮件的12.5%
从…起aspammer@website.com这是垃圾邮件。
德,施奈尔� 布劳恩·富克斯·斯普林特
ï¬�我是福伦·亨德。勒勒纳尔布伦酒店
«rapide»爆香乐干
帕雷索。拉沃尔佩马隆拉皮达酒店
萨尔塔·索普拉·卡恩·皮格罗。埃尔佐罗
马尔©n r©皮多·萨尔塔·索布雷·埃尔·佩罗
佩雷佐索。拉波萨万豪酒店
萨尔塔·索布雷�o preguicoso
选项2=>7::5:>\;2—;i3E:?:;i:ii–欧元;3;欧元™ f-iÃ%:-欧元™::;?:=«’::
=p我将其用于Python3:(bw_img是一个numpy.ndarray)
令人惊讶的是……事实证明,它被解决了,……多亏了@eryksun和stackoverflow!
import numpy as np
import cv2
from PIL import Image
import pytesseract
...
(thresh, bw_img) = cv2.threshold(bw_img, 128, 255, cv2.THRESH_BINARY | cv2.THRESH_OTSU)
...
img = Image.fromarray(bw_img)
txt = pytesseract.image_to_string(img)
print(txt)