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问题描述
Hello everyone,
I am a student just started with one image processing project.
I am working on OCR and want to reject/handle images based on low and high contrast separately.
Currently I am working on differentiating low and high contrast text images.
These images are of metallic plates and having various of noises, few samples are attached below.
<a href="https://drive.google.com/open?id=0B81c7NmWqSF9OEE3MWNLZ0haQ2s">1.jpg - Google Drive</a>[<a href="https://drive.google.com/open?id=0B81c7NmWqSF9OEE3MWNLZ0haQ2s" target="_blank" title="New Window">^</a>]
<a href="https://drive.google.com/open?id=0B81c7NmWqSF9UGFYTW0wRUNQM2c">3.jpg - Google Drive</a>[<a href="https://drive.google.com/open?id=0B81c7NmWqSF9UGFYTW0wRUNQM2c" target="_blank" title="New Window">^</a>]
<a href="https://drive.google.com/open?id=0B81c7NmWqSF9enB4NzVKTkJWZU0">4.jpg - Google Drive</a>[<a href="https://drive.google.com/open?id=0B81c7NmWqSF9enB4NzVKTkJWZU0" target="_blank" title="New Window">^</a>]
<a href="https://drive.google.com/open?id=0B81c7NmWqSF9OGgwVFR2LXJEZG8">2.jpg - Google Drive</a>[<a href="https://drive.google.com/open?id=0B81c7NmWqSF9OGgwVFR2LXJEZG8" target="_blank" title="New Window">^</a>]
Can anyone suggest a way/parameter to differentiate theses images?
Thank you in advance for your valuable time.
我尝试过：
图片有所不同解析度。
尝试累积直方图但失败了。
What I have tried:
Images are of varying resolution.
Tried cumulative histogram but failed.
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