Comments (3)
Utkarsh-Deshmukh
commented on July 20, 2024
Hi, Utkarsh
When I saw the code "orientim = np.pi/2 + np.arctan2(sin2theta,cos2theta)/2;" in ridge_orient.py,
I was confused about why need to add pi/2. Then, I drew a directional field on a img,but it looked irregular.
Looking forward to your reply.
Could you send me the image on which you are testing this. also could you upload a snapshot of the direction field. This will help me recreate the problem on my end.
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Utkarsh-Deshmukh
commented on July 20, 2024
Sorry. I forgot to answer your question. I believe the pi/2 is added to convert from geometric coordinates to image pixel coordinates.
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Lemanz
commented on July 20, 2024
Thanks for your reply.
I understand the ridge orient because of your help.
Now, directional field is ok. Thank you again for sharing the code.
…------------------ 原始邮件 ------------------
发件人: "Utkarsh Deshmukh"<[email protected]>;
发送时间: 2019年9月7日(星期六) 凌晨2:54
收件人: "Utkarsh-Deshmukh/Fingerprint-Enhancement-Python"<[email protected]>;
抄送: "胜利"<[email protected]>;"Author"<[email protected]>;
主题: Re: [Utkarsh-Deshmukh/Fingerprint-Enhancement-Python] some problemabout ridge_orient (#3)
Sorry. I forgot to answer your question. I believe the pi/2 is added to convert from geometric coordinates to image pixel coordinates.
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Related Issues (20)
- How to reduce processing time HOT 2
- Hi Utkarsh, would you please tell why this line need to times 6 ? thanks HOT 1
- Ridge extraction for fingerprint patches HOT 4
- Update Numpy HOT 1
- What is the equivalent method in opencv for ndimage.convolve? HOT 3
- Slight different in Cos image. HOT 3
- Discrepancy between the enhance images generated from python and c# code HOT 1
- How to run this code? which IDE? HOT 3
- 'fingerprint_enhancer' has no attribute 'enhance_Fingerprint' HOT 2
- difference in DPI between original image and "enhanced" image HOT 2
- TypeError showing HOT 2
- a problem HOT 1
- Issue in ridge_filter function in some of the images HOT 11
- No image HOT 1
- Program behaves weird HOT 3
- More problems HOT 12
- Execute problem HOT 4
- Issue with ridge_filter HOT 3
- Add support for fingerprint images taken using camera HOT 24
- Error occurring in ridge_filter HOT 8
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