Bug: 不能识别单字的图像

[SWHL]

问题描述 / Problem Description

本问题来自RapidVideOCR Discussions #61
对于电影字幕中，存在一帧图像仅有单字的情况。例如下图：

rec.png

rapidocr_onnxruntime==1.3.24版本中，可以检测到该文字，但是识别阶段未能成功识别

运行环境 / Runtime Environment

• rapidocr_onnxruntime: 1.3.24
• OS: macOS 14.5
• python: 3.10

复现代码 / Reproduction Code

from rapidocr_onnxruntime import RapidOCR

engine = RapidOCR()

image_path = "rec.png"
with open(image_path, "rb") as f:
    img = f.read()

result, elapse_list = engine(img)
print(result)
# 输出结果
# [['', 0.0]]

可能解决方案 / Possible solutions

尝试将检测到的文字左右扩增，有的可以识别，有的反而识别错误了，需要多造一些测试集来评估该策略有效性。示例如下：

t.png

from rapidocr_onnxruntime import RapidOCR

engine = RapidOCR()

image_path = "t.png"
with open(image_path, "rb") as f:
    img = f.read()

result, elapse_list = engine(img, use_cls=False, use_det=False, use_rec=True)
print(result)
# 输出
# [['嗯', 0.4284239]]

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[failable]

这个后面的数字也是识别不出来。