Découper et recomposer

[alain Guégan]

Bonjour 

et merci.

J'avais déjà sollicité votre aide à ce sujet

Voila mon problème: 

J'ai créé une «NOUVELLE IMAGE » en A4, blanche, sur laquelle, je voudrais disposer des lignes( ici, de musique)

Ensuite, je vais chercher ma "partition":

• Pour ce faire ,Je fais FICHIER>OUVRIR en tant qu'image( 1 page de musique dans le cas présent); il s'agit d'une page jpeg en A4 comme la NOUVELLE IMAGE.

je la laisse au même format

• je découpe une ligne, je la garde telle qu'elle( au même format)Je fais un copier-coller sur ma NOUVELLE IMAGE en A4...dans l'intention de mettre d'autres lignes aprèsEt voilà, la ligne fraîchement déposée disparaît comme par enchantement sur ma page blanche...Elle n'est visiblement plus au même format( 297,..mm de largeur)

****Ceci est le cas pour des lignes de musique, , mais ce serait pareil pour des images

Que puis je faire pour éviter ça ?

*La dernière fois, ça s'est arrangé tout seul

***je peux trouver « des trucs » pour y remédier,  sans doute, mais ce n'est pas une solution!

Je suis désolé, je n'arrive pas à joindre des images! c'est en Anglais
*****Vous avez bien compris: je ne veux pas que ma pièce découpée change de format en cours de roure

Merci à vous
@+

[rich2005]

Please use a translation program for posting.

Check that the A4 pages both use the same pixels-per-inch setting. Look at the top of the Gimp window for the page size in pixels.

   

Both A4 and different size then two options.

1. Make your new blank page the same size as the jpg sheet music
or
2. Scale the jpg sheet music to the same size as your new page.

[alain Guégan]

(01-19-2021, 07:08 PM)rich2005 Wrote: Please use a translation program for posting.

Check that the A4 pages both use the same pixels-per-inch setting. Look at the top of the Gimp window for the page size in pixels.



Both A4 and different size then two options.

1. Make your new blank page the same size as the jpg sheet music
or
2. Scale the jpg sheet music to the same size as your new page.

---

(01-20-2021, 07:52 AM)alain Guégan Wrote:

(01-19-2021, 07:08 PM)rich2005 Wrote: Please use a translation program for posting.

Check that the A4 pages both use the same pixels-per-inch setting. Look at the top of the Gimp window for the page size in pixels.



Both A4 and different size then two options.

1. Make your new blank page the same size as the jpg sheet music
or
2. Scale the jpg sheet music to the same size as your new page.

Thank you
But it doesn't work at all by any way (1 or 2); the jpg sheet looses the size A4, when it is cutted; the real problem is there
ça ne marche pas!
*is it possible, please, to use French! it would be easyer for me.
@+

[rich2005]

The screenshot shows what happens when you copy and paste with different resolutions (ppi) Is that what is happening to you ?

Please give the details for your jpg image as this size in pixels and resolution

   

[Ofnuts]

(01-20-2021, 07:52 AM)alain Guégan Wrote:

(01-19-2021, 07:08 PM)rich2005 Wrote: Please use a translation program for posting.

Check that the A4 pages both use the same pixels-per-inch setting. Look at the top of the Gimp window for the page size in pixels.



Both A4 and different size then two options.

1. Make your new blank page the same size as the jpg sheet music
or
2. Scale the jpg sheet music to the same size as your new page.

---

(01-20-2021, 07:52 AM)alain Guégan Wrote:

(01-19-2021, 07:08 PM)rich2005 Wrote: Please use a translation program for posting.

Check that the A4 pages both use the same pixels-per-inch setting. Look at the top of the Gimp window for the page size in pixels.



Both A4 and different size then two options.

1. Make your new blank page the same size as the jpg sheet music
or
2. Scale the jpg sheet music to the same size as your new page.

Thank you
But it doesn't work at all by any way (1 or 2); the jpg sheet looses the size A4, when it is cutted; the real problem is there
ça ne marche pas!
*is it possible, please, to use French! it would be easyer for me.
@+

There is no inherent  "physical" size to a JPEG. A JPEG is just pixels, and the thing that determines the area of the pixels (and therefore the print size) is the print definition.
In other words an A4 image can be 1000×1414 pixels (at 120 pixels/inch) or a 2000×2828 (at 240 pixels/inch). But in an image editor, the important thing is the pixels, the print definition is just a hint about how it should be printed, if ever...

And, when you cut/paste, what is pasted is just the pixels, so if you copy/paste the 1000×1414 over the 2000×2828 one it will only covers one fourth of it.

To see what has become of your paste, check the Layers list (Ctrl-l) you should see a "Floating selection" layer.