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Topic: What happend to Image?
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Alexei Boulbitch

Posts: 483
Registered: 2/28/08
What happend to Image?
Posted: May 8, 2013 4:09 AM
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Dear Community,

I just noticed that the function Image[ ] has unexpectedly changed since 9.0.0.

Some time ago I have written a handy program working with the image. I have once published it here. Among others this program applied the operation

ReplacePart[image,{4,2}?size]

Where image was the image in use and size has been a parameter equal to a desired ImageSize option. This worked previously. Now it does not.

I checked that the Image indeed has changed somehow.

Let us load any image. For example, this:

lena = Import["ExampleData/lena.tif"]

One may check that this is indeed an image:

Head[lena]

Image

Let us do like this:

lena2= Image[lena, ImageSize -> 300]

then the {{4,2}} part should memorize its size.

One may look at its TreeForm (evaluate this and make sure that it has levels 0, 1, and 2), and {{4,2}} is indeed 300

TreeForm[lena2]

However, if one would evaluate this

Lena2[[4,2]]

he get the message
Part::partd: Part specification... is longer than depth of object\""

Not only {{4,2}}, but also other leaves of the tree are not acceccible.

What happened to the Image?

Alexei


Alexei BOULBITCH, Dr., habil.
IEE S.A.
ZAE Weiergewan,
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L-5326 Contern, LUXEMBOURG

Office phone : +352-2454-2566
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e-mail: alexei.boulbitch@iee.lu



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