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  Batch processing - detecting various colours to crop to edge of scanned document JPG?
Posted by: mkilpatr - 06-29-2022, 11:43 AM - Forum: General questions - Replies (13)

Hello all,

I have just learnt to use gimp in batch processing mode to autocrop a directory of JPG images which are scans of documents (music manuscript paper). I've used this in a Windows cmd shell.

I have A LOT of these directories of scans. A lot of them will crop nicely with "plug-in-autocrop" if the background from the scanner is white: the result is usually a remnant border of about 15 pixes of white around each edge of the image. That's fine.

However, when some of the smaller documents are scanned, within the thin white border around the JPG image there are also areas of black, grey-blue or off-white, presumably depending on how the scanner was setup and what was behind the document. Sadly, the scans do not conveniently provide a clean, autocropable background.


The manuscript papers are all a typical beige hue or off-white, and some (we're talking 1930s) are a richer, more orangy-beige than others.

Is there a relatively manageable way of detecting where the off-colour border ends and where the beige/orange/off-white paper begins so that I can automate this cropping using gimp-crop-image?

Perhaps sampling for a range of beige colours expected for the paper and thus intelligently detect the edge of the paper? Or would that be a total nightmare?

I am attaching an example JPG (one that doesn't have any music written on the manuscript paper).

Working this out from scratch, if it's even doable, would probably take me weeks of learning. Maybe someone has some similar scripts which could be adapted?

Michael


By the way, there is an alternatve. As all the scans are in the same orientation - any excess border is always to the right and to the bottom of the manuscript paper, is it possible to have a script that runs in the graphical user interface such that GIMP can bring up each image in turn from the folder, allow me to click on the bottom right corner of the paper and for GIMP then to crop and save to that corner, save the result, close it and and bring up the next image without lots of mouse clicks?

That would be perfectly acceptable.



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  Missing tool option on Mac M1
Posted by: Bhang - 06-28-2022, 11:40 PM - Forum: General questions - Replies (2)

When I select the clone stamp or heal brush I do not have any options to modify the brush such as: Size, Angle etc. On the other side of the window above my Layers pallet I do see a parameter for Spacing crammed in there, but this is the only thing that is available and I'm not even sure its related to my clone or heal tool. Is there a way to get these options to show up? I have checked online and have found nothing yet that works, like resetting the tool, which doesn't appear to do anything.
 I'm on a Mac M1 Pro running MacOS Moneterey 12.4. 
Any help would be greatly appreciated.



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Question How to install plugins/scripts in folders?
Posted by: Krikor - 06-28-2022, 04:02 PM - Forum: Windows - Replies (8)

Hi there!

I always used the installation of my plugins/scripts creating a custom folder (MyPlugins) in C:\Gimp-2.10.32_Portable_32-64bit-Win\Preferences\plug-ins\MyPlugins and inside it I insert the plugins; as the image below:
   
Is there any mandatory way to install plugins / scripts in folders?
Inside folders? Names without spaces?

What is the official way to add plugins/scripts to the directory in Preferences?

Note, that the way I've done it (see image above) the plugins/scripts work. Exclamation

However, I'm having problems with the new version 2.10.32 Samj's Portable, and apparently the problem seems to go away when I remove my folders that contain my plugins and scripts (with all their contents).

Thanks.

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  Help With Color Seperation
Posted by: zodiakteez - 06-28-2022, 12:15 PM - Forum: General questions - Replies (3)

I am new to using Gimp, I am trying to take an image and separate the colors for screen printing.

I have tried following different video & online articles that explain the process however I continue to run into issues, perhaps I am not understanding the issue or I am using an image that cant be separated?

I have included a couple of attachments to show what I am trying to separate and I will also show what results I have achieved.

Image 1 - is the image created using a photo then adding text

I tried to separate the first color flesh/skin by :
selecting the color tool
I then clicked on the skin of the image
I copied the selection(ctrl+C)
I pasted the image(ctrl+V)
I clicked on the floating layer and clicked new layer
Image 2 is what appeared ( the black outline of the wrestler)

However when I would repeat this step for the next color ex. the red background behind the wrestler I would get nothing.

Is the problem the image I am using or something I am doing?

Thanks for any all information.



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  Clone sample from one layer
Posted by: pbacot - 06-28-2022, 12:27 AM - Forum: General questions - Replies (2)

I am using 2.10. On the Mac. I have used the Clone tool before and mostly it is working OK. However I can’t get it to clone (sample) from an individual layer. I select a layer to be active and set the source with the command key, I then set the layer on which I want to paint to be active, but it only paints with the overall image from ALL visible layers, including the one I am painting on.
The only way I can restrict the clone to a single static image is to put the image in a separate file as my source for the clone.
I am modifying grass for rendering and using an image of a lawn for my clone source. I can’t use the overall results as this creates a mess with the tool picking up what I just painted for subsequent passes.

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  Change filter icon sizes
Posted by: PickyBiker - 06-27-2022, 11:09 PM - Forum: General questions - Replies (5)

How does one change the size of the filter sizes in the Top Right of the user interface??

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  2D picture with relief: how to select deep ends?
Posted by: Xogroroth - 06-27-2022, 08:41 PM - Forum: General questions - Replies (13)

Hail all:

I have a 2D picture with relief (see photo), I am trying to select the whole carved out part, no luck.

Tried to enhance the edges (sharpen and High Pass) to bring out the edges, retry ... nothing.
The sharpened picture then, I too though the Photocopy, hoping to get a clean edge around ... no ball.
Black and white, and combinations of the above steps, none succeed.

Been looking in Google for a solution, though, no luck there either.
YouTube?
Nada.

Tried alternative search engines (Yahoo for one), nope no luck.

Is there anyone here that can help me, please?

Thank you.



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  How to make a good looking group picture from individual photos?
Posted by: guest273 - 06-27-2022, 07:41 PM - Forum: General questions - Replies (5)

Hey there everyone, guest273 here!

How to make a good looking group picture from individual photos?

A short story of why and what I need:

1) I'm about to have my graduation ceremony in my university later this week.
2) Our university has a tradition that each year the people who graduate send their photos to one person and that person makes them into a "group picture" or rather a "group collage".
3) This group collage is given as a gift to the university during the ceremony.
And this year, since no one really wanted to be the person, I was tasked with doing this task.

So, after a weeks of bombarding people with emails I have 34 pictures, one from each student (incusing myself). They're all totally different sizes & I have to make this thing fit on either an A4 or A3 paper. (Currently I'm going for A3 size, which is 4961 x 3508 px.)

I want to make something cool looking. Any ideas?

So my current idea is to take a blank A3 page, make a hexagon pattern where each hexagon would potentially be able to fit a person with his / her picture + their name OR just their picture and fit their name + surname on the 2 hexagons directly below. I have no idea how to mathematically make this possible. Like I don't want to use the half-hexagons on the very edges + I probably want to put the universities logo and faculty name somewhere on the "top row" of the hexagons. After that I have an idea, so the background wouldn't be white to put this HD 4000X3000 image of our universities building front as like a 20-30% transparent layer. I think it would look cool. I could also color the half hexagons in our university color pattern.

Like, how do I do any of this?  Huh Huh Huh Is there an 'easy' way to make each picture match each hexagon somewhat ok? Like is there simple masking in gimp? Because square images in hexagons would look whack.

I would really appreciate just a short description / clip of how to set up the background and how to mask said images so they'd only show in 1 hexagon at a time. Once I know how to do it once I should be able to repeat it 34 times.

Thanks for your help.

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  color adjustment question
Posted by: mark532011 - 06-26-2022, 11:17 PM - Forum: General questions - Replies (6)

Hi everyone. I have a question about the best way to do color corrections. I have a 1965 pinball machine and the plastics on the playfield have faded, it looks like the red faded out a bit more than everything else, though pure red areas are still red. I tried just making it warmer and playing with the hue a bit but I don't seem to be getting close. Looking at a reference image the face is a lot more pink but the whites are white.

Its a relatively simple colored set of images (originally silkscreened onto the plastic) and I thought I could probably select areas by color and individually adjust, but I have 10 of these graphics to do, is there an easier way?

reference pic:    

scan of my plastic:    

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  Changing Text
Posted by: richiie - 06-26-2022, 08:13 PM - Forum: General questions - Replies (4)

Hey Gimp fam,

I need help changing the text in this image. Can someone please give me some advice.

Thanks,

Rick

https://drive.google.com/drive/folders/1...sp=sharing



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