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深夜求解答，使用python的twain模块扫描A3，如何设置成A3输入？
官网http://twainmodule.sourceforge.net/docs/caps.html也有坑，比如介绍的以下一段
To set the current value of the capability, use the SetCapability method. This method take three parameters, the identity of the capabaility (CAP_*, ICAP_* or ACAP_*), the type of the value (as returned from GetCapabilityCurrent), and the new value.
>>> ss.GetCapabilityCurrent(twain.ICAP_IMAGEFILEFORMAT, TWTY_UINT16, TWFF_JFIF)
正确写法应该是ss.SetCapability(twain.ICAP_IMAGEFILEFORMAT, twain.TWTY_UINT16, twain.TWFF_JFIF)
我使用twain twacker查询和设置ICAP_SUPPORTEDSIZE结果如下
http://bcs.duapp.com/picstore/aMqibomfDN.png
http://bcs.duapp.com/picstore/txfl7TNTeV.png
当然是用ss.SetCapability(twain.ICAP_IMAGEFILEFORMAT, twain.TWTY_UINT16, twain.TWSS_A3)
也是失败的，真感觉有点奇怪，为啥有这个值，但是设置的时候又会提示超出范围呢
官网http://twainmodule.sourceforge.net/docs/caps.html也有坑，比如介绍的以下一段
To set the current value of the capability, use the SetCapability method. This method take three parameters, the identity of the capabaility (CAP_*, ICAP_* or ACAP_*), the type of the value (as returned from GetCapabilityCurrent), and the new value.
>>> ss.GetCapabilityCurrent(twain.ICAP_IMAGEFILEFORMAT, TWTY_UINT16, TWFF_JFIF)
正确写法应该是ss.SetCapability(twain.ICAP_IMAGEFILEFORMAT, twain.TWTY_UINT16, twain.TWFF_JFIF)
我使用twain twacker查询和设置ICAP_SUPPORTEDSIZE结果如下
http://bcs.duapp.com/picstore/aMqibomfDN.png
http://bcs.duapp.com/picstore/txfl7TNTeV.png
当然是用ss.SetCapability(twain.ICAP_IMAGEFILEFORMAT, twain.TWTY_UINT16, twain.TWSS_A3)
也是失败的，真感觉有点奇怪，为啥有这个值，但是设置的时候又会提示超出范围呢
Supplement 1 · Jan 9, 2014
ss.SetImageLayout((0.0, 0.0 ,11.0 ,17.0), 1, 1, 1)
http://twainmodule.sourceforge.net/docs/ds.html
完善的文档不好好看真该抽自己脸。。。
http://twainmodule.sourceforge.net/docs/ds.html
完善的文档不好好看真该抽自己脸。。。
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