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  JPEG Quality Issue
Posted by: d0m1n1k - 06-29-2024, 08:50 AM - Forum: General questions - Replies (8)

[Image: export-jpg.png]

Hi gimp users,

I got JPEG images from a multifunction copier. I really like the quality per size of these images!
I would also like to use this jpeg quality with gimp exports. But this doesn't work as expected. First I opened an image generated by the copier. Then see attached 3 screenshots from export dialog:

1 - these are the standard values. It produces a very big size jpeg. This is not what I want.

2 - these settings are automatically choosed, if I just check the "Use quality setting from original image" checkbox.
The exported image with this settings is very good. The size is even a bit smaller than original. This is what I want! I like to use this quality settings for default at all images!

3 - But if I uncheck the "Use quality setting from original image" and keep all other settings changed before, I got an image with horrible quality. Sad

Why can I not use this quality level by choosing the settings gimp choosed? It's absolutely insane: The only workaround I found to use this quality level is:
1. Open my own image (not generated by multifunction copier)
2. Copy the whole image to clipboard (Ctrl-C)
3. Open any image generated by the copier
4. Chance canvas size of this image to the image size from my own image
5. Paste my own image from clipboard (Ctrl-V)
6. Export with "Use quality setting from original image"

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  A selection of old spoof-logos and parody-clippy-art-stuff
Posted by: TumbleRocks - 06-29-2024, 02:32 AM - Forum: Gallery - Replies (3)

Hi all, I don't get enough time to play on my computer these days, but i was looking at some of my old parody art stuff from back in 2019-2021, and i decided i'd like to post a selection of it here - all made in GIMP.

Well, maybe you think some if it is crummy, and you would be correct. I definitely put more effort into some than others, and there was also a learning experience going on over the course of things. So, it is what it is, i guess, though i did try to cut out some of really bad pics i didn't feel like stood the test of time(last 5 years). So ask me some questions if you are curious about any of them, and maybe i'll help you understand where i was coming from when i made it. Or maybe i will be AFK - sry.

Anyway, Enjoy the GrAphiC aRT! (ノಥ益ಥ)ノ ┻━┻

...I'm feeling lazy so i'm posting to imgbox & postimg:

https://imgbox.com/g/n1pZPTXJAO

https://postimg.cc/gallery/Ws0Gqhc

apparently it is too many images to embed in a single post, so i'll just leave it at that.

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  Deselecting an Image
Posted by: Harveyshot - 06-26-2024, 09:02 PM - Forum: General questions - Replies (3)

Gimp 2.10.38, Win 10 64
I opened a black image on a white background, I selected the black part, copied and pasted it as a new layer onto a new larger image (canvas) with a white background. Now, I cannot deselect the black part I pasted into the new image. I selected the layer, tried ctrl+shift+a and Select/None but nothing gets rid of the marching ants.
Sure could use some help.
Thank you.

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  Text over Text in Different Color - How to Seperate?
Posted by: MTW613 - 06-26-2024, 06:22 PM - Forum: General questions - Replies (2)

OK forum experts.  I have an image of a 1000 year old manuscript which has black ink on one side that shows through and reddish/brownish ink on the other.  I want to see only the reddish/brownish ink and make the text on the reverse not visible.  
Here is a segment of the image (the full image was too large to post).
   
If you are successfully able to diverge the texts, please be specific in what you did (e.g. if you used some color mask, what value was it set to).

thank you!

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  pen tablet tilt
Posted by: GarethD83 - 06-26-2024, 06:09 PM - Forum: General questions - No Replies

Hi all, I'm new here and this is my first post. 
I bought a UGEE pen tablet a couple of years ago and when i first started using it, the pressure and tilt functions worked in GIMP. For some reason both these functions stopped. I have now got the pressure setting back but cannot figure out the tilt. 
In the configure input devices settings X tilt and Y tilt both have no options and say the axis has no curve (not sure if this is normal or not).
The mapping matric has an X on angle/tilt.
The internet is showing nothing, I've looked all over the place.

Anybody have any answers?

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  Calling Filters->Distorts->Waves from scheme
Posted by: berni - 06-25-2024, 08:03 AM - Forum: Scripting questions - Replies (10)

I tried to run the waves filter from within a scheme script (for being able to do batch processing). My best guess yet was

Code:
(plug-in-waves RUN-NONINTERACTIVE image drawable amplitude phase wavelength 0 FALSE)

Unfortunately this produces different results from when I use the waves filter interactivly (see images below). Also the parameter ranges differ and some parameters are missing completely. Looks like this is some other filter which is also called waves.

Diving into the config files I think interactivly I'm using GimpGegl-gegl-waves, but there is no documentation on that in the procedure browser nor do I know how to call this in scheme.

So my questions:

a) How can I call Filters->Distorts-Waves from within a scheme script?
b) Maybe more important: How could I have found out that myself?

---

Original image:

   

Using waves interactivly:

   

Using script:

   

Im using GIMP 2.10 (from Debian stable).

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  Rotate a parallelepiped (cube)
Posted by: T-TaaN - 06-24-2024, 08:48 AM - Forum: General questions - Replies (2)

I have a parallelepiped/cube baked in 2d image and I need to rotate it. Is there an option or a plugin, that let me select all 6 visible edges and make rotation of it as it were 3d object?

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  using Photolab - Batch corrections - Curve
Posted by: arodri - 06-23-2024, 09:28 AM - Forum: General questions - Replies (15)

Good morning

I'm very new using Gimp, so I'm here to ask for your help, for a situation that I'll explain below:

My system - Windows XP SP3

Gimp version - 2.8.22

The situation:

I'm a collector of comic strips from newspapers, and these strips are often not of great quality, which is why I recently discovered Gimp, and more specifically the "Colors - Curves" option, which helped me a lot in cleaning and improving the images (one by one).

Since I often have to improve hundreds of images, I looked for a way to do it in batch processing and discovered "Photolab - Batch corrections - Curve".

Even though I followed the steps explained
1. carry out a procedure on an image
2. Export the definitions of that procedure to an external file


When using "Photolab - Batch corrections - Curve" I invariably get the message, which I attach
I tried it several times, but the situation remains.

As I have a laptop with Windows 7, I thought, maybe because XP is old it doesn't work, but the result is the same.

Could you help me?
My thanks in advance.
Arodri



Attached Files Thumbnail(s)
   
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  Trying my hand at Processing, the "Logo" for grown-ups
Posted by: Ofnuts - 06-22-2024, 12:32 PM - Forum: Gallery - Replies (21)

This processing.

   

Code isn't too complicated
Code:
[align=left]float startAngle=0;

void setup() {
  size(800,800);
  colorMode(HSB,360,100,100);
}

void drawSquare(float radius,float angle,float size) {
    float squareX=width/2+radius*cos(angle);
    float squareY=height/2+radius*sin(angle);
    pushMatrix();
    translate(squareX,squareY);
    rotate(angle+radians(5)); // Compensate "slope"of log spiral
    rect(0,0,size,size,size/8);
    popMatrix();
}

void draw() {
  noStroke();
  background(255);
  float radius=height/2-50.;
  float size=radius/10;
  float squareAngle=startAngle;
  float shrink=.9975;
  float shiftAngle=7;
  float hue=360;
  float brightness=100;
  while (radius > 2) {
    fill(hue,80,brightness);
    drawSquare(radius,radians(squareAngle),size);
    radius*=shrink;
    size*=shrink;
    squareAngle+=shiftAngle;
    hue*=shrink;
    brightness*=shrink;
  }  
  startAngle-=.5; // For animation
}

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  Annunciation
Posted by: MJ Barmish - 06-20-2024, 05:06 PM - Forum: Gallery - Replies (1)

Hi, all. Here is my latest creation, using the puzzle and porcelain process, entitled "Annunciation" (published on my site https://mjbarmish.fr). In a while, I may post his original photo, as I did of other images ; but I hesitate, because I like it very much for its spiritual atmosphere and I fear trivializing it by showing where it comes from Blush .

   

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