Mask


Here 29masque.zip.

It contains two images of 490 x 490 pixels save in psp.
Image: tree on Raster layer 1
Image: lola on Raster layer 1
Open images and duplicate.
Close the originals.
Reduce at the bottom the tree image .
We are working on the image: lola.
Select the hand tool.

(To view the video without problems, await download before opening it.)

VIDEO

Default Masks

Select the lola image.
In the menu bar, select: Layers.
Then select Load > save a mask / load from disk.
Loading the mask window opens.

Under Mask,
on the left, we have a mask.
On the right, we have the preview window.
Click on the mask or the small arrow to the right.
We then see the list of default masks.
Place the list to see everything.
For the lesson the # 081 mask is picked.
But you can choose another.
Click on the mask to select it.

Under orientation: Fit to canvas: check.
Under options: Invert mask data: not checked.
Mask: Hide all: checked
Under create a mask from: Source luminance.
Under the preview: we see the transparency.
Click in the square underneath to see black and white model or click
to see it in transparency.
This does not change configurations, it is just a way to see the mask.
Click Load.

Above the layers palette, we have the icon: Mask overlay toggle.
A click on the icon.
We have a red shade in semi-transparence.
This shows us everything that was erased by the mask.
Re-click the icon to hide the overlay.

To continue working on the image, do a right click on the layer: Group _ Raster 1.
Merge > Merge group.

For example, you can add vector layers or raster above or below.
Example: Put a background color, a gradient or pattern with the paint tool.

Use the blue arrow: Cancel the last command several times to return
to the original image.

In the menu bar select: layers load/save a mask > load from disk.

Load the mask window.
The same mask that we chose before is showing.
In options: Invert mask data: Check
Click Load.

Experience is conclusive!
The reverse would be for an image on which we want to hide the centre.
Test multiple masks by changing configurations.


Making a mask with tubes:

Open a new image of 490 x 490 pixels 
Transparent: Check.
OK

With the Tube tool,
Add different tubes in the image.
As the case , increase or decrease the scale.

Here is my image with tubes.

Select the lola image.
In the menu bar:   Layers > new mask layer > from an image.

Under Source Window, make a click on the arrow.
In the scrolling window, select the image of the tubes.
Luminance of origin: checked
Example: with Invert mask data: not checked
Example: with Invert mask data: checked
OK

To continue working on the image, do a right click on the layer: Group _ Raster 1.
Merge > Merge group.


Mask with a vector shape.

Open a new image of 490 x 490,  transparent: Check
OK

Do one or several vector shapes.
Here I use in the foreground: black.
Background: white.
After drawing the vector form, select the lola image.
Layers, new layer mask > from an image.

Under source window select the image mask.
Source luminance: checked
Example with Invert mask data: not checked
Example with Invert mask data: checked
OK
To continue working on the image, do a right click on the layer: Group _ Raster 1.
Merge > Merge group.


Using an image as a mask:

Open the tree image.
Select the lola image.
Layers, new layer mask > from an image.

Under the source window, select the tree image.
Source luminance: checked
Example with Invert mask data: not checked
Example with Invert mask data: checked OK

To continue working on the image, do a right click on the layer: Group _ Raster 1.
Merge > Merge group.


Separate channels of an image can be used as a mask:

Select the image of the tree.
In the menu bar. Image > separate channels.
Here we can separate channels in three ways.
a) RGB (red, green, blue)
b) HSL (hue, saturation, brightness)
c) CMYK (cyan, magenta, yellow, black) we use here at)

Select RGB we have three new images that open.
They are all in shades of gray.
They have a different name. Red, green, blue.
Here is the effect on the lola image after you apply the red mask.
Here is the effect on the lola image after you apply the Green mask.
Here is the effect on the lola image after you apply the blue mask.

To continue working on the image, do a right click on the layer: Group _ Raster 1.
Merge > Merge group.


Test masks made with channels: HSL and CMYK.
The results are slightly different depending on the mask.

Another way , without using a mask.

By superposing two images one over the other and lowering the intensity
of the layer is above.
Example with the tree on the lola image.
Example with the image of the tubes on the lola image.

For more information, select the PSP help > help contents.
In the Search tab, type the word “mask” and select: view the topics.
Finally, select the topic you are interested in from the list.


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