Using Image Trace to reference an alpha channel to make a silhouette

[Document Geek]

Ihave a PSD file that with transparency. The background has been cleany erased. How do I use Image Trace to reference that alpha channel and give me an outline of the silhouette?

I know there is a way to accomplish it in InDesign using Clipping Mask Options, then reference the alpha channel, and then convert the clipping mask to a frame.

But how can I accomplish this in Illustrator? I am using the Silhouette preset for Image trace, but where there are white areas in the source image, they get traced. I want to somehow specify all non-transparent areas are referenced as black. This happens even if I change the threshold amount to 100px.

Sometimes the whiteareas are inside the black areas (like as with a shiny face), but othertimes, the white area is outside the face (like a baby wearing a white hair bow).

[Argos5C90]

Those white areas you are asking about are sometimes hidden; actually they are not hidden. Those layers are grouped and you have to ungroup from edit navigation, simply. After that, I hope you will be able to see that area. 

If you still think, it will not goin to work. Please do lemme know!
Thanks

[Document Geek]

So I added a blue background so you can see how, even with the Threshold moved almost all the way up, part of the white box is still getting clipped out.

So I'm still wondering if it's possible for Illustrator to recognize an alpha channel is a plced PSD. 

InDesign has this ability, and I can use it as a clipping mask, then convert the clipping mask to a frame.

Does Illustrator have the ability to do recognize the alpha channel when using Image Trace?

[Document Geek]

Can anyone tell me if Image Trace is able to reference an Alpha Channel in a Photoshop image?

[Monika Gause]

If you are referring to tracing just the alpha channel and not the rest of the image: then no.

[Ton Frederiks]

No, you cannot use an alpha channel in a .psd in Illustrator

[omarf67542332]

no, in illustrator you cannot. use both indesign and illutrator, and bridge to. or drag and drop the image from folder to the softwares. they has the same sizes. create clipping path in id then copy it in illustrator and center with the image

or you can do in photoshop by clipping the psd selection. then export it