here is a simple photo, post-processed with Gimp to give a pleating effect : it is titles "Curtain Villeggiatura" like a holiday scent


   


https://mjbarmish.fr

News today here in AU, airlines have stopped flying and media companies are off air due to a Windows workstation issue.

Hello All!

Could someone explain to me if what I'm getting is the way the Wavelet-decompose filter should behave?

01- I downloaded an image - https://wallpapercave.com/wp/wp12859845.jpg ;
02- I added an alpha channel to the image layer;
03- I duplicated the layer;
04- Using the Paths tool I traced an outline on part of the image of this new layer;
05- I did Path to selection, inverted the selection and deleted it;

So far, no news, a common sequence.

Then on the layer with the cutout and transparent background I applied the Wavelet-decompose filter ( Filters-Enhance-Wavelet-decompose), default settings.

The issue is that the filter, instead of applying the effect only to the visible and cropped part of the layer (the rhino head), applied the effect as if the crop had not been made and the background had been extracted. 

I don't know if I managed to explain the situation well, so I recorded a short 48-second video trying to show what is happening.

https://i.imgur.com/q2bB4hi.mp4

Next, I created a new image using just the rhino head layer, without the original image layer at the bottom of the layer stack.
I applied the Wavelet-decompose filter and again it resurfaced the original background that I had removed.

Am I just confused or is there something strange about this?

Thx!

Good day all.
 
In my spare time I convert photos or scans of rare technical documents to readable PDF files.  Many of the photographs originate with unknown persons and I receive them third or later hand and the quality is what is politely called poor - see a typical example below where I have roughly edited out fingers at the top.

For some time I have been addressing warped pages photographed by persons unknown by using PerspectiveCropper to basically get all the corners about where they belong and then using ScanTailor to convert the images into clean PDF documents.
 
Because my eyesight is failing I can no longer do this as the handles for both programs are too small for me to see.
 
Today I tried GIMP to do my editing for the first time and the basic GIMP workflow I found to manipulate the images is fantastic. ➤ Filters, Distort, Curve bend.
 
That said I immediately ran into two major problems in that:

1.  I am having to work with what I would call a thumbnail of the image I need to manipulate and with my eyesight that is just not practical - especially as the images tend to be dark with little contrast so I cannot see what is happening.   I could not find a way to make the Curve bend control panel/palette full screen.
 
2.  I did not manage to make the distorted "diamond" shaped page square
 
Obviously my most important question is - How to make the Curve bend control panel/palette full screen?
 
That may well solve problem two but if it does not then how do I drag the outside corners to square up the page?
 
I am using GIMP 2.10.38 on Win7 Enterprise
 
Thank you

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Hey all,

I'm trying to create a material and one of the textures I need to make is far outside my skill in using gimp. The texture is for a D6 die, I'm trying to switch out the dots with numbers.

This is what I'm starting out with. What steps do I need to take to make the effect? I've already isolated the number. I just put this here for you all's benefit..

This is the overall effect I'm trying to apply to each number, those edges with changing color gradient.

Also want to paint this texture inside each number.


Thanks in advance for the help!

Dear Fellow GIMP User,

I am using GIMP 2.10

I have been using GIMP to add watermarks (via layers) to the photographs in our Local History Collection before I upload them to our Library Catalogue and other online sites. I have had no problems before now. But today a ghost has gotten in my computer.

I open my photo, add my watermark and unbidden a menu window called "Brightness-Contrast" pops-up and I don't want to adjust brightness, I didn't press it it. I press 'Cancel' and the menu window comes back. I press "OK" and the menu window comes back. I hit the "X" in the top right hand of the menu window and the menu window keeps coming back. 

I have troubleshooted by closing the program and re-opening, but the same occurs. I have also shut down the whole computer and restarted. Yet the problem still keeps happening.

I have attached a screenshot. 

Can anyone help please?

Thank you in advance,

Rosemary Ritorto
Local History Coordinator
Town of Victoria Park Library Service

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I'm trying to remove the checkered background and replace it with a white background.  I looked at several vids on youtube but none really explained it.  It's probably easy but I'm opening this up for the first time.  Thanks

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So, you tried to predict or emulate Gimp's behavior with math and failed. And you wonder why. You have come to the right place, take a seat and fasten you seat belt. Also, make sure you check all images at their actual size (click on them to see them in a separate tab, and make sure your browser is exactly 100% zoom) otherwise some examples could seem to demonstrate exactly the opposite of what is stated in the text.

The root cause is that our eyes are not linear devices. If you double the power output (for instance, switch on a second light), you don't perceive the room twice as bright. Somewhat brighter, yes, but certainly not twice as bright. Furthermore, our eyes are more sensitive to small differences between dark tones that between light ones.

So, when pixel color values are encoded on a byte, encoding the physical output directly (which is what Gimp calls Linear light) wastes precious bytes values encoding bright nuances we can't perceive, and leaves a handful of values to encode all the subtle darkness nuances we can distinguish.

To avoid this, the values are encoded using a power law that has two nice advantages:

• The perceived "medium gray" is about half-scale
  
• There are many more values to encode low luminosity levels
  

   

   

• In Gimp 2.10, it is so, because the middle of the gradient is where half the power is red and half the power is green. In other words, each color channel emits half the full scale, so the middle color is #BCBC00:    
  
• In Gimp 2.8, working directly on the gamma values, the middle color is #808000, which is a much darker brown:      .
  

   

• Gamma-encoding is mostly used in low-precision modes (8-bit (from most image formats) and 16-bit integer (from PNG)
  
• Use of sRGB of course assumes that the images uses sRGB, if you load an image with another color profile, you have to use that color profile for the conversions.
  
• If you use the Pointer dialog or the Sample Points dialog you can ask for the Pixel representation, which in high-precision images is the actual [0.0 .. 1.0] linear light value.
  

• ODS format for maximum compatibility   
  
• Contains macros, so macros have to be enabled
  
• Shows formulas to convert from sRGB to linear and vice-versa
  
• Also contains functions for the same (LINEAR2GAMMA and GAMMA2LINEAR) that take [0 .. 1] values and return [0 .. 1] values (in other words you still have to scale to from [0 .. 255] values, but as  a bonus it works with 16-bit values too...)
  

Brand new gimpster here, please be gentle!

I'm using GIMP 2.10.30 on Windows 10 64-bit.

(Irrelevant, but background): I am trying to prepare eight individual photo crops (of the same size), ultimately to drag into a master montage/canvas featuring all eight.

My problem: 

I appreciate there will be easier ways of doing this, but as I'm a newbie, I am following Method 2 of this YouTube video as it seemed fairly straightforward to follow:

https://youtu.be/dQSlqcMCKx0?t=221

Unfortunately, when I get to the step where I choose the Scale tool (Tools>Transform>Scale), my background image disappears, and instead transforms into a chequerboard, meaning that I cannot resize the image behind the crop selection (see video), before ultimately making my chosen crop.

The best explanation I could find on gimp-forum.net replicating my issue was this one:
https://www.gimp-forum.net/Thread-Image-...y-to-scale

...but even after trying to follow these instructions it doesn't resolve and I am stuck. Please note that, as per a step of the video, I am deliberately setting the Opacity to 50 per cent so that I can see the background image and manipulate it to the preferred position behind my crop window before making the final crop. 

I've spent several hours on this and (without wishing to go into too many details), the photos are of something I need to discuss with my doctor, so I'm anxious to get this over the line.

Here are a couple of screen shots: just in case you're scared of the sight of blood, I've changed the photos to two of my regular peanut butter sandwich-loving wild visitors instead!

On the first screenshot (having set the initial Crop window to my chosen 480x540 pixel size), things are going as planned:

   

However, on the second (after hitting the Scale Tool), two things occur differently from the YouTube Autobot video tutorial I have described above:

Firstly, the background image disappears

Secondly, the "handles" around the image and the centre square with a "plus sign" inside it appear around the crop selection, and not around the background selection and therefore do not allow me to resize (make smaller) so that my selection can be fitted into the 50 per cent opaque crop window.

   

As a reminder, from the video, this (below) is how I would hope to see things: chequerboard crop window, opaqued background image with handles round allowing me to drag and resize

   

To you guys it will be dead simple, I'm sure, but I'm losing the will to live here! Please dive in and help out, thanks.

I've searched all over and I can't seem to find the answer to my question. I have a PNG image of an airplane fuselage with two windows that are transparent. All I want to do is to add a third window between them, and I can't make it work. I've read that I need to create a new layer and 'Add Alpha Channel' but that option is greyed out. I also read that if I do Windows --> Dockable Dialogs --> Channels and see 'Alpha' as an option (which is there) that means the Alpha Channel has already been added, which I guess makes sense because there are already two 'windows' on the image that are transparent.

With that information, could someone please walk me through the steps to create a third window that will be transparent? The online videos and help I've found show me how to remove the background around a part of an image to make it transparent, but that's not what I need in this case.

Thank you very much for your help!