You want the Threshold function. It lets you set a cutoff value, where all pixels lighter than that value become white, and all others become black.
The Threshold function can be found at Image>Adjustments>Threshold.
I would start by selecting the Polygonal Lasso Tool and then outlining the mailbox. Ideally, you would use the Pen Tool for more precise results, but you wanted simple/quick
Then, create a Hue/Saturation Adjustment Layer. Select it from the options, by clicking this icon at the bottom of your Layers Palette:
You will now need to invert your Layer Mask. ...
First, Place your image and make sure it actually is grayscale. You can do that by looking at the link info in the Links panel.
Setting the fill color on the frame will change the fill of the whole frame and any white parts of your grayscale image.
Selecting the image within the frame and setting the fill color will change the color of the black parts of ...
Actually, there are even more ways to make an image gray scale, e.g. via the channel mixer or several other methods, explained in this post:
How do I change a single layer to grayscale in Photoshop CS4?
Some of them offer different opportunities of fine tuning, yielding in very different outcomes. So there isn't really a 'right' method.
See those articles ...
F) Channel Mixer adjustment layer or adjustment (either one depending on level of destructiveness desired) Tick the Monochrome option -- Allows complete control in my opinion.
Whatever the default state of the adjustment is, that is what simply switching to greyscale would produce. With the Channel Mixer you can tweak the channels to see where you need to ...
If I understand correctly, you want to generate a halftone image like this:
If so, there are a number of applications and plugins that you can use.
It can be done in Photoshop, using either the built in Filter > Pixelate > Color Halftone or through changing the image mode to bitmap and using a halftone screen.
It can be done in illustrator with the color ...
One is more coloquial.
"I want my photo on black and white". Nobody says "I want my photo on grayscale". "Black and white photography", not "grayscale photography".
But if you want to get technical, I'll post a list of some terms.
Grayscale It is a file of one channel of information. It can be 8 bit or 16 bits, but only one channel. Normally this channel ...
Using GIMP, you could:
fill layers with your black & white patterns (one layer per pattern), and then
use colour selection (Shift+O), select all the zones of one colour by clicking on it, and
use that selection as a mask on the corresponding pattern layer (right-click → add mask to layer → initialise with "selection"), or alternatively invert the ...
While gimp would work, its a bit tedious. I would image trace the map with inkscape or other vector tool and then replace the fills with patterns. Because its less work than doing this with GIMP. So if we take this example:
and change it to vectors with trace(because its faster to do than your demo), select all swatches and replace them with patterns you ...
None. No browser can display more than an 8 bit color per channel in 0-255 range. No affordable monitor can actually display more than 10-12 bits of color per channel, most if not all consumer monitors out there have an 8 bit limitation. So you have no option other than somehow precondition the image.
I am essentially missing the point of Landsat ...
2 bit images
2 bit images are not 2 color images.
2 bits would store 4 colors. Currently the png file format allow several bit depths http://www.w3.org/TR/PNG/#11IHDR.
Some good years ago the CGA color mode for monitors displayed a Cyan Magenta Black and White images. Those were 2 bit images.
You could convert them to Red Green Black and Yellow. That was ...
Add a new layer below the greyscale layer and fill it with white.
Select the greyscale layer and set the opacity to 60%.
Image > Adjustments > Curves
Click the upper point of the output curve... then set the Output value to 60....
Max output will be 60%.
There are probably additional ways to accomplish this as well.
Well you could simply only use the Grey swatches in the Swatch Panel.
Or you could select art and choose Edit > Edit Colors > Convert to Greyscale -- note that this will not alter placed raster images or raster effects.
As far as I am aware, colored brushes are not possible in Photoshop.
As for your alternative question though, definitely! Just use gradient maps. For instance:
If you have a grayscale gradient like this:
And you apply the following gradient map to it (accessible from image/adjustments or as an adjustment layer):
You'll get the following new gradient:...
You can't (as far as I'm aware) store different images (or text or anything else for that matter) in a single PDF for different printing processes.
You should be supplying PDFs in the correct color space, with appropriate profiles embedded, so I'm not sure if it would even be a good idea.
What I would suggest is to setup both sets of images in the InDesign ...
There are a lot of considerations, but at the base level, set the image to a mode that doesn't allow anything but black and white. This is how it's done in Photoshop:
If the image is in RGB mode, you first convert to Grayscale mode. Choose Image > Mode > Grayscale. Photoshop asks to discard color information. Click "Discard."
Now, choose Image > Mode > ...
Printer drivers sometimes add other paints to make rich black. I usually test them by sending bitmap file or print plates from Acrobat.
the printer driver still split the file into CMYK I use empty ink cartridges and force printing in black only.
Edit the swatch to be 0% (C,M,Y); x% (K); OR edit the swatch to be 0,0,0,100% and then set the item to a percentage tint; OR set the items to "Black" and set a percentage tint.
If you leave them assigned to a swatch instead of "standard black," you can easily re-edit the color value without much effort nor effect on other elements.
If you use the swatch ...
It's real easy actually once you are converted to grayscale, hold your mouse over the darkest part of your image and looking at my image look at the info panel.. You will see it says 100% K. that means where my mouse is at that moment is 100% black.
The next thing you need to do is go to your layers panel and adjust the fill property slider down to 60%. ...
There's a textile dust overlay image (or more likely a fill pattern made of a dust photo), a grey background and the written paper is a separate layer with a drop shadow. It's between the grey background and the dust overlay.
If you watch carefully, you can see the dust pattern is the same on both pages, only shifted and it's repeated even in one page. That ...
The problem is that the Greyscale Filter is an SVG filter, and these can't be expanded to vector only. When saved as a PDF, SVG filters must be rasterized because the format doesn't support SVG filters. So the only real option, if you want to keep everything vector, would be to recolour the artwork yourself by changing fill and stroke colours instead of ...
When you search for colors on a brightness percentage basis (HSL) 100% = rgb(255, 255, 255) which means each 1% = ~2.55rgb leaving color values in between that are more accurately defined using rgb and/or hex color codes. The lost values are most likely a bi-product of HSL models in web/software applications that attempt to visualize the color values for ...
How best to emphasize a portion of your paper?
All printers can easily reproduce grey text. The issue with grey text is that of sufficient contrast to be legible and easily readable.
Legibility will be an issue where symbols are used. Mathematic is heavy with problematic situations.Here's where you should look for them
Limits (the ...
Is it OK to use gray font for the parts of math proofs I remove but
Not sure how a graphic designer could answer this.
If somebody print my PDF, will gray fonts work well with all modern
Yes, generally speaking if you have enough contrast a printer will be fine printing gray colors.
Also which RGB value do you suggest for "...