Unrecognized function or variable 'colorize'.

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Fadhli Atarita 2021-2-24

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评论： Fadhli Atarita 2021-3-3

Why can't i use the 'colorize' function despite having the Image Processing Toolbox™ Hyperspectral Imaging Library installed?

Thanks

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Fadhli Atarita 2021-2-24

I'm using R2020b

Manuel Di Raimondo 2021-2-26

i'm having the same problem with this function and the "selectBands" . No other functions of the toolbox/library

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Rashed Mohammed 2021-3-1

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Hi @Fadhli Atarita

Before you use the colorize function, make sure you have hypercube object present in the workspace. If you are still facing issue, please share minimal code and data so that we can reproduce the issue.

Hope this helps

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Walter Roberson 2021-3-1

Imagine you are standing in front of a device with at least some electronics, and the device has a "Run" button. When you push the "Run" button, does the device connect somehow to a planetary computer that checks to see what kind of device it is, and makes a decision about what to do? Or is the device a member of a class of similar objects each of which has a defined meaning of "Run" built into it locally, ignorning what any other kind of object might mean by "Run" ?

Classes are sort of like objects that have built-in behavior that define what "Run" (or "colorize") mean to them, ignoring what it might mean to something else. There is no planet-wide "colorize" function that checks whether a "colorize" behavior has been defined for that particular kind of input and then executes as appropriate: hypercube objects have built-in "colorize" that do not have to check whether the input is the right kind of input because it is local behavior for that kind of device that you cannot activate for other kinds of devices. Other kinds of objects, such as hyperhairdressers, might have their own "colorize" that only has meaning in context for them.

When you define your own .m function, unless you do so in a very specific way, you create a function that has to be prepared to accept any kind of input and has to verify that the inputs are something you can work with before going ahead with whatever. But hypercube class has been defined in that very specific way that attaches a local colorize behavior to it, and that behavior will not be activated for any other kind of objects.

Walter Roberson 2021-3-3

What is the class() of the data you are passing in for it?

Fadhli Atarita 2021-3-3

Hypercube, the one that I tried colorize on and it worked for that.

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Image Processing and Computer Vision Image Processing Toolbox Hyperspectral Image Processing

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Unrecognized function or variable 'colorize'.

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