[Plugin] ImageTrimmer

[TIG]

Do you definitely have Java enabled and .jar files set to execute [open] with Java and NOT a decompression tool.

I suspect that you might not got your PNG files transparency set up suitably.

Remember that ALL pixels with some transparency set [even a tiny %] will be discarded and trimmed off.

So... you might need to edit the png in an image editor like Gimp or Photoshop...

Firstly 'Flatten' the image to remove transparency from every pixel.
Now use its 'Layers > Transparency > Add Alpha Channel...' [or something like that]
Then use the editor's 'magic-wand' tool to select all of the background pixels and <delete> them.
The background should now disappear, and be 100% transparent.
It's also a good idea to use 'Crop' on the image to trim it exactly to the bounds of the solid parts: every pixel has to be considered and processed by ImageTrimmer so it is always best to minimize the number of pixels in the image you are going to process...

Save [export?] the png and import it into an empty SKP... retry ImageTrimmer on it...

If still no joy then... then post the image as an attachment here - or PM it to me if it's 'sensitive'.

[rahdad1]

Attached are two pngs

Is java working? I don't know but I presume not. I keep getting the can't find or load main class c:\users\Rick\appdata\local\temp\skmtools\edgedetector.jar
Even though the progress line says "making edges", I don't think it has the image/data to actually do this. It's just running the loop until it times out.

I have both the jre and jdk java packages loaded and the web test on their web site indicates it is loaded and working correctly.
File association is set to run jave.exe (even tried javaw.exe)

I know java won't run on the "start"(metro) screen in win8 or win8.1 but I'm running sketchup on the desktop mode anyway.

Any other suggestions?

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[Dave R]

There's nothing wrong with Image Trimmer, anyway. It works perfectly for me.

[TIG]

@unknownuser said:

I keep getting the can't find or load main class c:\users\Rick\appdata\local\temp\skmtools\edgedetector.jar

The files are there ? So it's a failure to load ??
Where do you get this message ?
Is it a Java dialog that pops up ?
This suggests Java is NOT set up to execute the .jar files ?
My settings are attached...

There's nothing wrong with your png file[s] as Dave has shown...
The 'man' png ImageTrims in just a few seconds !

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[rahdad1]

The image "example-1.jpg is what I've been expecting from "imagetrimmer".
Please verify.

Also attached is a screen shot of the java error message box which flashes on and then off so fast I had to do a screen capture video to be able to read the message.

My java settings are identical with the exception of the one about Java plug-in.
My Java control panel doesn't have this check box category.

[TIG]

This is weird, as jar seems to be associated with Java
Please confirm that the jar files are in the correct Temp folder...

[driven]

just a thought, does the online java test suit work on Windos...

one of my apps took me there to check my java instal recently

john

[rahdad1]

Attached are images of both directories (google and user/temp)
They are identical since i copied the google one to the temp one earlier.
If you know that's a problem let me know.
I know less than squat about Java and I've only been using Windows 8.1 for about a month.
I use quite a few other ruby scripts (some are yours) in Sketchup 8 without any problems.
This is the only one however that uses .jar files.

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[driven]

I don't have windows but this is the link page to test your java instal

http://java.com/en/download/installed.jsp

might be a good place to start

john

[rahdad1]

Ran the test.
Seems to be the right version that I installed.

Do you know of at least one other person running this ruby script in win8.1 and sketchup 8?
Just trying to figure out where the problem might be. (other than me)

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[driven]

interestingly if I run this[includes the link] in Menu >> Window >> 'Ruby Console' using

@dlg = UI;;WebDialog.new("Java", true,"java", 900, 900, 200, 200, true, true)
@dlg.set_url("http://java.com/en/download/installed.jsp")
@dlg.show_modal

I get a missing plugin alert? which may be signs of a permissions issue?

I'll dig deeper

john

[TIG]

@driven
I'm using Win7 on this PC.
I find that running your @dlg code in the Ruby Console worked fine for me - no errors, and it confirms latest Java is installed [v7.45].

@rahdad1
One very odd thing I noticed in your 'SKMtools' folder...
Where did that 'META-INF' subfolder come from?
It's not in the standard install RBZ etc ?
What's in it ?

Incidentally, are you an Administartor ?
If not, then give yourself that power in the Users Control-Panel...
Also, as well as FULL security permissions 'for all' to your Plugins folder... is SketchUp.exe set to 'always run as administrator' under Properties > Compatibility ?

[rahdad1]

After total frustration, I decided to delete the SKMtools files and folder and START over.
The problems probably started in the installation itself.

This is the same procedure I originally used........

I downloaded the file SKMtools_V20121214.rbz
While in Sketchup under preferences/extensions/ install extension
I "chose" SKMtools_V20121214.rbz

It seemed to load however when I went looking for image trimmer under the tools drop-down
it was missing.

I then separately downloaded the file "SKMtools_loader.rb and put it in the plugins folder.

Now Imagetrimmer is listed in the drop-down menu.

Clicking it the first time brings up an error window that says it can't find SKMtools_loader.rb even though it's in the Google SketchUp 8\Plugins folder

Obviously I've done something wrong from the very beginning.
Please explain the correct way to install this.

[TIG]

If you auto-install the toolset from its current RBZ that is all you need to do.
You get a 'SKMtools.rb' and its subfolder of several helper files, called 'SKMtools'.
The obsolete 'SKMtools_loader.rb' file is NOT needed.
In fact having it will break things !
I assume you found it and then downloaded that from somewhere else, and installed it in frustration.
It is now several years out of date !
Please remove it from your Plugins folder...
It will break things if it's forced in there !

If you have proper FULL security permission for your Plugins folder then the current toolset actually deletes that very file from the Plugins folder [if you have it installed] as it loads, and it does a tidy-up.
If you have limited permissions, or you have subsequently manually reinstall the '_loader', then you could get issues as it loads and messes with the latest code...

Can I suggest that you manually delete all SKM files and the whole 'SKMtools' subfolder.
Then reinstall the SKMtools toolset from its latest RBZ.
Then restart SketchUp and then retry the tools.

Things are getting very tangled

[rahdad1]

@tig said:

If you auto-install the toolset from its current RBZ that is all you need to do.
You get a 'SKMtools.rb' and its subfolder of several helper files, called 'SKMtools'.
The obsolete 'SKMtools_loader.rb' file is NOT needed.
In fact having it will break things !
I assume you found it and then downloaded that from somewhere else, and installed it in frustration.
It is now several years out of date !
Please remove it from your Plugins folder...
It will break things if it's forced in there !

If you have proper FULL security permission for your Plugins folder then the current toolset actually deletes that very file from the Plugins folder [if you have it installed] as it loads, and it does a tidy-up.
If you have limited permissions, or you have subsequently manually reinstall the '_loader', then you could get issues as it loads and messes with the latest code...

Can I suggest that you manually delete all SKM files and the whole 'SKMtools' subfolder.
Then reinstall the SKMtools toolset from its latest RBZ.
Then restart SketchUp and then retry the tools.

Things are getting very tangled

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I totally removed the SKMtools folder, SKMtools.rb, SKMtools_loader.rb and anything left in the user-temp-skmtools folder.

I am administrator and I have full control in the plugins folder and SKMtools folder as shown in the attached images.

From the SketchUcation toolbar within Sketchup, I found and auto-installed the SKMtools.
It confirmed successful install when it was completed.

I ran imagetrimmer and, like always, the java error window pops up with the same message about "can't find or locate main class c:......\edgedetector.jar"

It's probably a java / win8 problem which I don't expect you to help me solve.
Your program obviously works fine based on other users successfully using it.
I'll keep researching and hopefully figure it out.
If you want to continue to suggest other things to try, I'm welcome to that also.

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[TIG]

You have it as good as we can get from the SketchUp/Ruby side...
It MUST be a Win/Java issue

[KO1134]

How do I use this plug-in?
I can't get it to work!

[TIG]

@ko1134 said:

How do I use this plug-in?
I can't get it to work!

Reread the instructions, and comments in the thread.
The Image must be imported as an Image, NOT a texture.
It must be a PNG.
It must have a transparency alpha-channel.
The background pixels to be removed must on that.
ALL other pixels must be 100% opaque.
If they have any transparency at all they will also be removed !
The simplest way to sort this is to open the PNG in Gimp [or PhotoShop] and 'Flatten' it to remove transparency, then add in the transparency alpha-channel, then use the magic-wand to select all of the background pixels and <delete>.
Save the PNG and import it as an Image into your SKP.

Select it.
Choose ImageTrimmer on the Tools menu.
Answer the prompts...

Run with the Ruby Console open to see if there are any error-massages...

Because this tool uses Java '.jar' files [small executables] to process images, you need to have Java installed and enabled on your computer [the usual default].
Also check that the .jar file-type is set to open with Java [execute] and NOT to open in your [de]compression application - some hijack various file extensions that are used by things like Java and stop them executing...

If all of this fails, post clear details of what is wrong...

[bitslapped]

I have tried this numerous different ways and couldn't get it to work.
-Saved PNG as GIF to remove semitransparent pixels, then back to PNG
-Most of the time doesn't get past 'scanning pixels'even on a 600x600px image
-When it does complete I am left with a hidden outline of the image with no actual image in it.

I am trying to put a plant library together and this would make life soo much easier.

[TIG]

All transparent pixels are assumed to be background and are ignored by ImageTrimmer.
So even slightly transparent ones go !

Using Gimp.
Flatten the PNG to remove transparency.
The 'background' usually reverts to opaque white pixels [or sometimes black]
Add a transparent alpha layer.
Use the magic wand to select all of the opaque white pixels forming the background.
Press the 'Delete' key to remove them,
Now you should see a transparent background - two-tone gray checks.
Save the PNG file [in Gimp this is called 'Export...'].
That PNG when Imported as an Image into SketchUp should now ImageTrim properly.

Note that the ImageTrimming is only accurate to a 'pixel width' - so areas of opaque pixels that are only one [or sometimes two] pixels wide will be missed out too - because the transparent ones are taken as the 'border' and if a border's edges are effectively 'coincident' no face can form and the unfaced edges are auto-removed too...