如何在Python中将OpenCV图像传递给Tesseract？
发布时间：2020-12-20 12:08:15 所属栏目：Python 来源：网络整理
导读：鉴于 Python代码调用Tesseract的C API并使用ctypes库,选项#1图像由Tesseract加载,它工作正常！问题出现在选项#2中,当我尝试传递OpenCV加载的图像时,T??esseract返回垃圾： from ctypes import *import cv2class API(Structure): _fields_ = []lang = "eng"ts
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鉴于
Python代码调用Tesseract的C API并使用ctypes库,选项#1图像由Tesseract加载,它工作正常！问题出现在选项#2中,当我尝试传递OpenCV加载的图像时,T??esseract返回垃圾：
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]
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)
输出如下：
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