sample points

[Pirlouit]

   
Hi,
I just installed Gimp 2.10.22. I am on macOS.
When a photo is imported, the Sample Points window is empty and a message reads (in french): This image has no sample point. However, I checked Display -> Show sampling points. In Picker mode, by installing the guides (vertical / horizontal) on the image, I have the Picker window (pixel / RGB) that opens. But nothing in the Sample Points window. How do I display these sample points? Does it depend on the type of photo (RGB or sRGB, etc.)? Thank you in advance for your advice.

[tmanni]

When you use the Color Picker, you are only picking a color, not adding a sample point.

To add a sample point:
1) ensure Rulers are visible : menu View > Show Rulers
2) hit Ctrl key and click on a ruler (horizontal or vertical) and drag your mouse cursor on the canvas

You will see a cross centered on the mouse cursor ; release the click to add the new sample at the cursor position.

[Krikor]

Pirlouit,

Quote:Pat David - 

"Ctrl + Left Click in the ruler area of your main window (shown in green above), and drag out into your image. There should be crosshairs across your entire image screen showing you where you are dragging.

When you release the mouse button, you’ve dropped a Sample Point onto your image. You can see it in my image above as a small crosshair with the number 1 next to it."

►►Details in - https://pixls.us/articles/color-curves-matching/ ◄◄

[Pirlouit]

(03-17-2021, 01:09 PM)tmanni Wrote: When you use the Color Picker, you are only picking a color, not adding a sample point.

To add a sample point:
1) ensure Rulers are visible : menu View > Show Rulers
2) hit Ctrl key and click on a ruler (horizontal or vertical) and drag your mouse cursor on the canvas

You will see a cross centered on the mouse cursor ; release the click to add the new sample at the cursor position.

Thank you tmanni. I will see if that work for me.

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(03-17-2021, 01:16 PM)Krikor Wrote: Pirlouit,

Quote:Pat David - 

"Ctrl + Left Click in the ruler area of your main window (shown in green above), and drag out into your image. There should be crosshairs across your entire image screen showing you where you are dragging.

When you release the mouse button, you’ve dropped a Sample Point onto your image. You can see it in my image above as a small crosshair with the number 1 next to it."

►►Details in - https://pixls.us/articles/color-curves-matching/ ◄◄

Thank you Pat David. I will test that...

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(03-17-2021, 01:16 PM)Krikor Wrote: Pirlouit,

Quote:Pat David - 

"Ctrl + Left Click in the ruler area of your main window (shown in green above), and drag out into your image. There should be crosshairs across your entire image screen showing you where you are dragging.

When you release the mouse button, you’ve dropped a Sample Point onto your image. You can see it in my image above as a small crosshair with the number 1 next to it."

►►Details in - https://pixls.us/articles/color-curves-matching/ ◄◄

I tested, but that don't work. 
See my 3 screenshots. When I place the guides (vertical / horizontal lines) on the image, I get blue dashed guides.
By placing the mouse pointer on the intersection of the two axes, the dotted lines turn blue. When I'm in Move Tool mode, by clicking and holding the click, I move the axes together from place to place. In this case, the axes are solid, white lines. But still no numbered reticle ...
(My captures do not show my mouse pointer)

---

Quote:Pat David - 

"Ctrl + Left Click in the ruler area of your main window (shown in green above), and drag out into your image. There should be crosshairs across your entire image screen showing you where you are dragging.

When you release the mouse button, you’ve dropped a Sample Point onto your image. You can see it in my image above as a small crosshair with the number 1 next to it."

►►Details in - https://pixls.us/articles/color-curves-matching/ ◄◄[/quote]

I tested, but that don't work. 
See my 3 screenshots. When I place the guides (vertical / horizontal lines) on the image, I get blue dashed guides.
By placing the mouse pointer on the intersection of the two axes, the dotted lines turn blue. When I'm in Move Tool mode, by clicking and holding the click, I move the axes together from place to place. In this case, the axes are solid, white lines. But still no numbered reticle ...
(My captures do not show my mouse pointer)

[Krikor]

Please, Ctrl+click = Sample Point
Just click = Guides (blue line)

look at https://youtu.be/hXEJqUE5K2Q or anohter tutorial video.

[Pirlouit]

(03-17-2021, 03:24 PM)Krikor Wrote: Please, Ctrl+click = Sample Point
Just click = Guides (blue line)

look at https://youtu.be/hXEJqUE5K2Q or anohter tutorial video.

First, sorry for my mistake: I called you "Pat David" instead of Krikor! Then I had to send the same post twice because I made a mistake with my attachments. What it's like to be 70 ...  

I just got it. But this is also a mistake in Gimp Help. As I am on a Mac, it is not the "CTRL" key but the "CMD" key (the apple) that you have to press. And it works: see capture.