Problems recognized mixed scripts in Tesseract 4 alpha

[Brendan O'Kane]

Hi all,

Running 'tesseract -l eng+chi_tra' on a scanned page of English text mixed with Chinese characters does not detect any Chinese characters at all: 

> The five chapters on fiction, memoirs, and other kinds of prose that

> follow offer as many approaches to our understanding of the transition

> between 1644 and 1700. Focusing on the lives of Mao Xiang § X (161-

> 93) and Yu Huai A1% (1616-96), Oki Yasushi develops portraits of these

> two "romantic Jiangnan loyalists," who clung to patterns of late Ming

> feeling and aestheticism long after the Ming had fallen. The image of

> loyalism as romantic is in striking contrast to starker images of loyalist

> experience. Both Mao and Yu are best known for their memoirs, which

> focus prominently on women, one of the new ways of figuring nos-

> talgia and resistance in male writings of the early Qing. Robert Hegel's

> "Dreaming the Past" is similarly concerned with the individual, fo-

> cusing on Chu Renhuo #ARE (ca. 1630-1705+), as well as his novel,

> Sui Tang yany: G B® #&, (ca. 1675), but it extends well beyond Chu and

> his work in contemplating how "the past" (the Tang past in particular)

> shaped imaginative literature in an era when the present offered little

> solace.

The characters are (mostly) correctly recognized when only 'chi_tra' is set as the OCR language, but at the cost of seriously degraded accuracy in English OCR:

> The fve chapters on fiction,menoirs, and other kinds of prose thar

> follow offer as nany approaches to our understanding ofthe transition

> between :644 and I7oo. Focusing on the |ives of Mao 文 iang 冒 裱 (I6II-

> 93andYuTiuai 余 懷 ((616-96), OkiYasushidevelops portraits ofthese

> two "ronantic Jiangnan loyalists"who clung to patterns of ]ate N{ing

> feeling and aestheticismn long after the Ming had fallen. The of

> loyalisn as ronantic is in striking contrast to starker 1nages of |oyalisr

> experience. Both Mao and Yu are best known fortheir memolrs, wˇhich

> focus Proninently on womnen, one of the new ways of figuring nox-

> talgia and resistance in male writings of the early Cuing. Roberr Tiegel's

> "1reaning the Past" is simnilarly concerned with the individual, fo-

> cusing on ChuRenhuo 褚 人 穫 (ca. I63o-I7oy+)}, as well a$ his novel,

> 5#77mzg5227 隋 唐 演 義 (Ca.I67y, butit extends well beyondChu and

> his work in contemplating how "the past" (the Tang Past in Particulan

> shaped imaginative ]iterature in an era when Lhe present offered |ittle

> $olace.

Is this a known issue? Am I doing something wrong here? 

--Brendan

[ShreeDevi Kumar]

Have you tried the best trained data for Chinese which has English in addition to Chinese as part of the training. That maybe a better option than using eng+

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[Brendan O'Kane]

Aha! Worked like a charm -- thanks very much! Combining HanT+Japanese seems also to degrade recognition accuracy pretty significantly, but HanT from the best trained data works pretty well on its own for pages that are just English and Chinese.

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