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Issues with captcha images [message #165863]

Thu, 18 August 2011 22:37

JanRei

Messages: 361
Registered: October 2005
Location: Germany

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1) It seems atoz.ttf is not really a good font for displaying captchas. Captchas can contain numbers but the font seem to support only letters.
index.php?t=getfile&id=6187&private=0

2) Without ttf support the captcha are hard to read. For example, this is supposed to be 578G. It does not seem to be possible to choose a larger font size with imagestring(), but maybe we could reduce the fading in this situation. Without it the captchas are clearly readable.
index.php?t=getfile&id=6189&private=0

3) Looking at the code imagettfbbox() is called to test for ttf support. I am not sure what happens if ttf is not supported. Maybe we should prefix it with @ to suppress warnings that might be thrown.

Attachment: captcha_hardread.png
(Size: 10.42KB, Downloaded 1660 times)
Attachment: captcha_number.png
(Size: 10.43KB, Downloaded 1667 times)

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[Message index]

		Issues with captcha images By: JanRei on Thu, 18 August 2011 22:37
		Re: Issues with captcha images By: naudefj on Fri, 19 August 2011 08:52
		Aw: Re: Issues with captcha images By: JanRei on Fri, 19 August 2011 13:46
		Re: Aw: Re: Issues with captcha images By: naudefj on Fri, 19 August 2011 13:52
		Aw: Re: Aw: Re: Issues with captcha images By: JanRei on Fri, 19 August 2011 14:02

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