Very weird . . . cannot use color picker --- it turns image monochromatic

[Smee Again]

Tried this evening to choose the greenscreen portion of an image by choosing the color picker. As soon as I click on the image, everything turns the color that I click on . . . the entire image is now a monochrome green.

Restarted program, same problem. It didn't work like that in the past. Before, selecting a color with the color picker then using <Select>/<Select Sampled Color> would do a great job, needing minimal adjustment. Now, the entire process is an exercise in futility!!!

This is the first attempt to do this since upgrading, but it is really not what I need to have happen right now.

[HVDB Photography]

I think you're on an (image) layer, right click on it and choose rasterise...

[walt.farrell]

5 hours ago, HVDB Photography said:

I think you're on an (image) layer, right click on it and choose rasterise...

Even on an (Image) layer, the Color Picker Tool just samples; it does not change the color of anything, for me.

[HVDB Photography]

Hi Walt,

I grabbed one from the internet and saved it locally (had NO embedded ICC profile or metadata.), then placed it my document (>  image layer) .

[walt.farrell]

Can you share a sample .afphoto file, before the problem occurs?

[HVDB Photography]

ok, later when I'm back home

[HVDB Photography]

5 hours ago, walt.farrell said:

Can you share a sample .afphoto file, before the problem occurs?

Hereby, 

afphoto

Upload failed  = PNG-file as I downloaded from internet 
You'll need to download it from here

EXIF textfile

 

green-screen-backgrounds.afphoto

EXIF__green-screen-backgrounds.txt

[walt.farrell]

18 minutes ago, HVDB Photography said:

Hereby, 

afphoto

 

Thanks. That's very strange. I agree that clicking on your (Image) layer with the Color Picker Tool changes the color of the layer, but I have never seen that happen before, and it does not happen with other files I have that have an (Image) layer with what seems to be the same structure you have.

[HVDB Photography]

13 minutes ago, walt.farrell said:

That's very strange.

I know...

[Wosven]

It's happening because this color is use as "matte" in a paletized PNG, and should represent transparency.

If I save a transparent screenshot wiith red as "matte" (or "cache" in French, another localisation problem, this mean nothing here ), and click on it after placing the PNG in a document:

[Edit] Oups, the file with "red matte": [/Edit]

[HVDB Photography]

Oh yeah.

Works fine when using File > Open = (Pixel) layer

But not when using File > Place or dragging it on the canvas (matte or transparent) = (Image) layer, which needs to be rasterized first.

(The man sitting on the chair, is a placed JPG-file ... )

But I probably misunderstand it completely ...

 

red cache !!.afphoto

[walt.farrell]

I still don't understand this. (And I understood none of Wosven's explanation about transparency and a palettized PNG file; sorry.)

I can tell you how to stop the color from changing, though. Turn off the "Apply to Selection" option in the Color Picker Tool's Context Toolbar, which seems to be on by default:

But it's also on when I tried it with my file, and nothing changed in my file when I used the color picker, whether I Rasterize the (Image) layer or not.

[Wosven]

44 minutes ago, walt.farrell said:

Wosven's explanation about transparency and a palettized PNG file

Today, you can save a PNG with transparency, but before, and perhaps with other file formats like JPG, there wasn't trasnparency and a trick was to use a special colour (a vibrant and barely use colour like the green above or RVB magenta), and the app would distinguish this colour and use only the parts that aren't this colour. It was used to design skins or set of icons for programs like Winamp, with all the parts in the same file separated by this colour.

You only needed to specify the colour as we do with the "matte" option, or use the colour specified in a documentation.

It's possible some apps can't read alpha channel and keep on using this.

It doesn't explain why AD behave this way when selecting this colour, but why the matte colour is a special one and behave strangely differently. (But I would expect it to not be displayed when opening such a file => transparency as intended instead, and the area covered by this colour to be shown in the alpha channel).

[Wosven]

1 hour ago, walt.farrell said:

I can tell you how to stop the color from changing

Another way is to switch the foreground/background colours, (key X). I don't know if there's a foreground and a background colour, but it seems to colorize the picture only when one of them is selected while picking the colour.

[Smee Again]

2 hours ago, Wosven said:

Another way is to switch the foreground/background colours, (key X). I don't know if there's a foreground and a background colour, but it seems to colorize the picture only when one of them is selected while picking the colour.

Doesn't help.

After making the selection, then swapping the color, the entire image is monochrome blue (that was the secondary color. If I change the color to red, or any other color of my choosing, the image takes on that color.

The process is B R O K E N. Makes no difference in the behavior if I untick "apply to selection" except that the color change is not instantaneous. I first have to click on the selected color in the color tab, then everything turns green.

Using version 1.7.2.471

[Smee Again]

18 hours ago, HVDB Photography said:

I think you're on an (image) layer, right click on it and choose rasterise...

This prevents the monocrhome effect, but the image is a jpg rasterized image. Why in the world should I have to rasterize a raster image? That is not making any sense to me?

If you could explain, I would appreciate it greatly.

Thanks for the suggestion.

[walt.farrell]

12 minutes ago, Smee Again said:

but the image is a jpg rasterized image. Why in the world should I have to rasterize a raster image?

You haven't given us any real information, such as screen shots of your workspace and the Layers panel, or a sample .afphoto file, so largely we're guessing what you have and what you're seeing. One supposition was that you're working on an (Image) layer, rather than a (Pixel) layer, which you would get if you Placed an image file into your document (File > Place, or drag/drop, or copy/paste) rather than Opening it (File > Open, etc.).

[walt.farrell]

21 minutes ago, Smee Again said:

Makes no difference in the behavior if I untick "apply to selection" except that the color change is not instantaneous. I first have to click on the selected color in the color tab, then everything turns green.

If you click on the selected color in the Color panel, you are telling Photo to apply that color to the selected object or layer. Of course that action would turn it green (if green is the color).

The question is why does clicking the Color Picker Tool in your image change the color. That could be because you have "Apply to Selection" enabled in the Context Toolbar. If so, one thing you need to do is turn that option off before using the Color Picker Tool. Or use the color picker (eyedropper) in the Color panel to select colors, instead.

[Smee Again]

1. Opened image. Only layer existing. No other layers . . . no adjustment layers, no pixel layers, no fx and no live filters. Just one layer --- the image I want to start working on.

2. It has not been saved as an afphoto file . . . why save something that completely does not work.

 

[walt.farrell]

4 minutes ago, Smee Again said:

1. Opened image. Only layer existing. No other layers . . . no adjustment layers, no pixel layers, no fx and no live filters. Just one layer --- the image I want to start working on.

2. It has not been saved as an afphoto file . . . why save something that completely does not work.

 

Why save? So you can provide it as a sample to help others explain what you're seeing
(In fact, having both the .afphoto and the original image would be useful for diagnosis.)

Does it happen for you with all images, or just that one?

Something strange is certainly happening because with an Opened image, with just the background layer, clicking with the Color Picker Tool, regardless of that Context Toolbar setting, does nothing for me but change the colors shown in the Color panel.

 

[Smee Again]

Simple question that requires neither an image posted or a file uploaded:

WHY must I rasterize a raster image before I can use <Select>/<Select Sampled Color>?

[Wosven]

It's only happening if you click on the colour use as matte when exporting a transparent PNG to have a PNG without transparent background but a selectable and special colour that is used for the pixels that should be ignored/considered as transparent.
That's the same as the use of this green colour to select and delete easily a background on an image when taking picture or filming, the difference is that it's an option and colour you choose while exporting a PNG.

When I was talking of switching foreground/background, it was before clicking on the colour, since it's only one of those that modify the entire image's colour, the other one don't.

[walt.farrell]

9 hours ago, Smee Again said:

Simple question that requires neither an image posted or a file uploaded:

WHY must I rasterize a raster image before I can use <Select>/<Select Sampled Color>?

Simple answer: You don't need to.

If you have a raster image, showing as a (Pixel) layer in the Layers panel, you can Select > Select Sampled Color without doing anything to the image first.

[walt.farrell]

5 hours ago, Wosven said:

It's only happening if you click on the colour use as matte when exporting a transparent PNG to have a PNG without transparent background but a selectable and special colour that is used for the pixels that should be ignored/considered as transparent.

Sorry, but in the files that @HVDB Photography posted it happens for any color that one clicks.

[Smee Again]

1 hour ago, walt.farrell said:

Simple answer: You don't need to.

If you have a raster image, showing as a (Pixel) layer in the Layers panel, you can Select > Select Sampled Color without doing anything to the image first.

If I don't, then clicking on the green background when using the eyedropper tool turns the entire image monochrome green.