Tim,
I understand that values must fall within [0,1].
However, rand only produces values that fall within that interval.
For some reason, the package does not seem to find that true.
Looking at the error message, it says:
MethodError(Images.MapNone{FixedPointNumbers.UFixed{UInt8,8}}(),(0.6592312388568704,))
It thinks that 0.6592312388568704 is out-of-range or it cannot convert to
UInt8.
Regardless, I cannot pass UInt8 or Float64 arrays without receiving an
error message.
Something is wrong here.
On Friday, April 29, 2016 at 4:19:16 AM UTC+3, Tim Holy wrote:
>
> The key line in the error message is "out-of-range values": if you're
> using
> `Float64`, black corresponds to 0.0 and white corresponds to 1.0. It's
> alerting you that some of your values went outside that range. If it
> didn't
> alert you to this problem in some way, then you'd wonder "how come I had
> this
> nice image but when I saved it and loaded the file, it was all white?" (or
> all
> black?)
>
> If you read the message carefully, it's also telling you how to avoid this
> problem:
> map(Images.Clamp01NaN(img), img)
> where `img` is your array. This function will clamp all values to between
> 0
> and 1, even if your image contains NaN values.
>
> Best,
> --Tim
>
> On Thursday, April 28, 2016 09:46:27 AM [email protected]
> <javascript:> wrote:
> > Hello all,
> >
> > I'm trying to save PNG images of the mandelbrot set.
> > So, I've been using the package Images to do so.
> >
> > To get a grip around how the package works, I've decided to test out the
> > function "save".
> > I've given it a filename to save in and a random two-dimensional array
> of
> > Float64s (Array{Float64, 2})
> > However, it did not work.
> >
> > I keep getting the following error:
> > WARNING: Mapping to the storage type failed; perhaps your data had
> > out-of-range values?
> > Try `map(Images.Clamp01NaN(img), img)` to clamp values to a valid range.
> > WARNING:
> >
> MethodError(Images.MapNone{FixedPointNumbers.UFixed{UInt8,8}}(),(0.659231238
>
> > 8568704,)) [inlined code] from .\number.jl:54
> >
> > I don't really understand why this is happening.
> > I'm currently using Julia 0.5.0-dev+3731.
> > I've tried doing it in Julia 0.4.5, but it still doesn't work.
> >
> > Is this issue common? Or is it just on my machine?
> > Regardless, what do I need to do to get this issue resolved?
> >
> >
> > Thank you,
> > Yousef
>
>
