Imaqtool shows specific values for a device property but set(src,Property) doesn't specify those values

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Benjamin Avants 2014-3-14

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https://ww2.mathworks.cn/matlabcentral/answers/121565-imaqtool-shows-specific-values-for-a-device-property-but-set-src-property-doesn-t-specify-those-val

回答： Benjamin Avants 2014-3-14

I'm working on a camera configuration routine on 2012b for a gui that uses different cameras on various workstations. When I open imaqtool, several properties of the cameras have a fixed set of values but when I query those properties from the source object, MATLAB returns a message to the effect:

set(src,'Exposure')
The 'Exposure' property does not have a fixed set of property values.

I know it does, imaqtool knows it does. How can I find those values?

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Answer 1

Benjamin Avants 2014-3-14

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https://ww2.mathworks.cn/matlabcentral/answers/121565-imaqtool-shows-specific-values-for-a-device-property-but-set-src-property-doesn-t-specify-those-val#answer_128394

在 MATLAB Online 中打开

I found the answer. By querying the specific property with propinfo the ranges are returned.

propinfo(src,'Exposure')
ans = 
             Type: 'double'
       Constraint: 'bounded'
  ConstraintValue: [-7 -1]
     DefaultValue: -7
         ReadOnly: 'whileRunning'
   DeviceSpecific: 1