Questions tagged [grayscale]

Images without colour information, displayed only in black, white and varying shades of gray.

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are there 5x5 pixel grayscale fonts?

I am trying to design a (or: use an existing) very low-res bitmap/pixel font. I only have little space, but am thinking about utilizing different brightness levels of the pixels. I found this post (...
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Why are these images converted by Photoshop from RGB Color to Grayscale larger than expected?

I am scanning a grayscale document using my EPSON ES-500W. When scanned in as Color I received a 4.7MB file. If I convert it to Grayscale in Photoshop and save the file it shrinks minimally to 4.4MB. ...
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RGB to Grayscale without adding noise

You can convert an RGB image into grayscale in Photoshop easily. Here's a swatch of 16 colours. The values of the colours are important. However, later versions of Photoshop add noise to the image. ...
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2 votes
1 answer
96 views

How can I turn brightness to transparency in grayscale image

I would like to turn a grayscale image into a transparent image where: #000000 (black) → turns into → #000000 (black) 0% transparency #FFFFFF (white) → turns into → #000000 (black) 100% transparency ...
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How can i get a Grayscale color space?

Hi, my work requires me to produce icons that are grayscale in color space. everytime i export icons from illustrator it comes out as RGB. i even made new files with converted color>convert to ...
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Soft proofing grayscale images in Photoshop

When printing a grayscale image it's treated exactly like the black channel of a color image. So in order to get a correct preview of how it will look on print it must be soft proofed with the CMYK ...
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Grayscale image to horizontal lines of varying density

I need to break down grayscale images into 4 shades of gray, but each shade should consist of horizontal black lines. So black would have a certain density of lines, shade 1 would have 25% less, shade ...
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How to create a PNG that looks different depending on if the background is black or white

So, I know that this question has already been answered before, however, the steps to actually create the image (the black cat/white cat image) were pretty unclear and it might also be somewhat ...
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Color to 12 shades of Grayscale conversion & Grid overlay

Thanks for reading my post. I would like to create a grid drawing, like the ones done by Chuck Close. This uses a system where an existing photo is transposed/painted by hand to a much larger canvas, ...
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1 answer
666 views

Gray values different between grayscale and RGB color modes?

I'm trying to understand the different numbers I get when I convert an image from grayscale to RGB or vice versa. I'm only working with grayscale values at the moment as I'm working on a heightmap but ...
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How can I "apply" a filter permanently without rasterizing?

I used a filter (color > grayscale) to modify the color scheme of my vector graphic. Now when I export to pdf, Inkscape either (a) rasterizes the filter, so that I no longer have a vector graphic, or (...
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Open source PDF to grayscale conversion tool

I need a PDF (vector) to grayscale conversion in Linux CLI. Any open source tool to achieve that task? I have already tried ghostscript for that task grayscale conversion was happen but fonts are ...
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Paper background with flecked or fibrous pattern

How do you achieve the background paper effect in Marissa Mayers CV? It looks like there are a bunch of soft sketched lines and squiggles, or it was printed on that creme contour expensive paper and ...
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132 views

The levels adjustment is not applied after hitting OK

I have a gray-mode design with one layer, when I change the levels of it, it shows changes while in preview, but once I hit OK everything goes back like nothing was happened - I've tried to convert ...
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744 views

Is there automatical way to fill white pixels to black if it's surrounded by black pixel? See my image for more details

Basically, if you look at the image I want to fill the white noise if it's surrounded by black pixels. Maybe not a single white pixel but I definitely would like to fill the bigger patches. I was ...
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950 views

Why does Photoshop CS6 open new documents in grayscale mode?

When I open a new document in Photoshop CS6, it opens in grayscale mode. How can I change this?
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3 votes
1 answer
875 views

Any command line tool to convert "black-and-white" images to "bit mapped"("two-tone") images

On Windows, IrfanView can create a bi-level version of Gray Level Images conveniently. Is there any command line tool available on Linux?
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Adobe Acrobat Saving Grayscale not CMYK or RBG [closed]

This is a new problem for me. Acrobat is saving grayscale removing all color info. It appears color in Acrobat but will go gray in Photoshop. Checked settings to make sure not grayscale. Ideas please?...
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Erode-like filter from Gimp in Photoshop

I'm seeing a guy on YouTube making a heightmap for sand dunes, using Gimp and Photoshop. In Gimp > Filter > Generic he has this tool called "Erode" Which accomplishes the following I ...
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-2 votes
1 answer
1k views

How to create a simple grayscale image with conical gradient?

I need to create an image in illustrator with the following specific requirements. Is this possible? If so, how? Requirements: 1) The image needs to be in grayscale with a conical gradient such that ...
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CMYK profiles issue

When I’m working on a CMYK file with a SWOP Coated profile in Photoshop, I can convert my QR code color to true black (K=100%) by opening a new work space with the same dimensions but changing the ...
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1 answer
4k views

How do I set the image mode to 4-bit grayscale (16-color)? Photoshop CS6

I see I can adjust my image between 8, 16, and 32 bits per channel, and when I create a new image I can choose between bitmap (1-bit) or 16-bit+ in all the other modes. Is there a way to do a 4-bit ...
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2 votes
1 answer
493 views

How to obtain this effect using Photoshop CS6?

I need a really simple, fool-proof method to obtain this effect: I want to leave the letterbox colored while make all the surrounding area in a deep dim gray shade, the grade of gray that I see is ...
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1 vote
2 answers
8k views

Printing a grayscale image with a CMYK printer

I'm new to the forum and I would like to ask a question. To print a postcard I have to submit my design using a CMYK template provided by the printer (Moo printing). The design is a grayscale image ...
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2 answers
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Creating a line of dots that goes gradually from 1PPI to 1000PPI (DPI) in Illustrator

I'm testing a laser cutter and need to make a "graduated" line consisting of tiny dots that goes from 0 or 1 PPI(DPI) to 1000 PPI(DPI) - breaking a line into gradually smaller pieces with same-size ...
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2 votes
3 answers
853 views

Photoshop: Converting to Grayscale and then setting darkest value to 60% black

Once you have a color picture converted to grayscale, how could you tell photoshop to set the darkest color to 60% black and then shift the rest of the tones accordingly? EDIT: To give some context, ...
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1 answer
680 views

Illustrator/InDD - Grayscale layers combine to CMYK

Problem I have a grayscale eps image that is throwing CMYK errors with Acrobat preflight. Output Preview show no CMY values - only K, but the preflight errors will cause problems when we send it to ...
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1 vote
2 answers
2k views

Photoshop: how to move image to mask

How can I move a black & white image to a layer mask in Photoshop? My image includes shadows, lights, etc and I can't just select area and paste to mask. I need this saved in grayscale.
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1 answer
335 views

Converting a gray gradient to grayscale in InDesign

I have a InDesign document and my printer needs my "grays" in grayscales. My document has some reds and also some CYMK grays. Is there a easy way to convert the grays to grayscales but keep the other ...
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3 answers
420 views

How can I print true b&w with Epson Discproducer PP-100? (no CYM color ink used)

I would like to print a true b&w image on discs using the Epson Discproducer PP-100 but when I select Black in the Discproducer print settings it still uses a bit of color ink (CYM). I was told by ...
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Are there any noticeable differences if a grey scale image is converted to RGB?

Browsing through the archives I didn't see this question asked before after reviewing the tags color-profile, rgb, grayscale but I am wondering if there are any visual differences if an image that was ...
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1 vote
1 answer
915 views

Converting a logo to monotone in GIMP [duplicate]

I usually convert my logos to a particular colour (not just greyscale) in photoshop by using the following process: Convert to Greyscale/Choose Duotone/Select colour and click okay. I need to do the ...
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5 votes
2 answers
666 views

Convert to BW by replacing colors with "shapes" (for printing)

I know nothing about image editing & conversion so please don't come down too hard on me. What I'd like to do is, to convert some color pictures (these ones here) into black & white so I can ...
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2 votes
1 answer
807 views

Saving a greyscale image as a bitmap file converts to indexed colours

I'm trying to save an image as a Greyscale bitmap file in Photoshop but it keeps changing to Indexed colours. This also causes the image to become really dark. I am trying to change the files of a ...
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1 vote
1 answer
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How to draw high-resolution images on client-side?

Any libraries, API, or tips are welcome. I am trying to draw Landsat 8 images using Canvas utility of Javascript on my browser. The grayscale reflectance values for Landsat 8 bands are from minimum -...
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-1 votes
2 answers
692 views

Why do I see 3 different values for 75% white?

Why do I see 3 values for 75% of white? Same for 50% and many other values. Yes there is a difference between each other, #C0C0C0 is (192, 192, 192), #BEBEBE is (190, 190, 190), #BFBFBF is (191, 191, ...
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2 answers
921 views

Using gray font, is it OK? [closed]

I am writing a math draft in PDF format. Is it OK to use gray font for the parts of math proofs I remove but retain? If somebody print my PDF, will gray fonts work well with all modern printers? ...
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2 votes
1 answer
2k views

Make the same grayscale image appear in different colours in InDesign

I have seen an old InDesign file link to the same tiff image but have it in different colours just by applying those colours on the object's frame within InDesign. The tiff file itself was a 8-bit ...
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2 votes
2 answers
5k views

Difference between "Black & White" and "Grayscale"

From my previous question I found that Grayscale ≠ Black & White. So, I want to know the differences between "Grayscale" and "Black & White" clearly/completely.
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3 votes
2 answers
151 views

Can I store separate grayscale versions of images in a colored pdf?

While one should ideally make sure a color image is also suitable for greyscale printing via a printer's automatic conversion, sometimes it would make sense to simply provide an alternate version (...
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-1 votes
4 answers
4k views

Turn Grayscale image into black image with transparency

What I want is for the image to turn all grays into transparencies of black, which doesn't seem to work when I simply use "Colour Range" to remove white from image. -Using Adobe Photoshop.
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1 answer
639 views

Show color by dot density

Suppose I have a grayscale image and I want to translate the image into a black and white image (bw-image) in the following way: white color = no black dots in the bw-image ...in between.... black ...
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1 vote
2 answers
108 views

Grayscale, washed out effect for web page footer

I am trying to duplicate this portrait mosaic -- inspiration courtesy of Mozilla's homepage -- for a company intranet footer. I'm a Photoshop neophyte (more adept with Illustrator) and don't know how ...
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3 answers
10k views

How can I save an image as a 2-bit PNG. any ideas?

Im looking to save an icon as a 2-bit PNG or BMP, any ideas? The lowest option in photoshop is 4-bit. My icons are 4-levels grayscale and must be saved as a 2-bit image. Is there a trick or a ...
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1 vote
1 answer
2k views

How to get 16-bit grayscale color picker in Photoshop

I am creating a 16-bit grayscale drawing in Photoshop. Unfortunately, the color picker doesn't show 16-bit grayscale numbers (0-32768). Without being able to input exact values, it's very difficult to ...
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13 votes
6 answers
156k views

How do I set a Photoshop image to just pure black and white, no grayscale?

i'd been googling for answers for this, all guides point me to make it grayscale, but actually it is still not enough, it still allows non-black(gray gradient). What I want is Suppose I ended up ...
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3 votes
2 answers
17k views

Saving an 8-bit grayscale image as a 2-bit image

Assuming there's an 8-bit grayscale image; what's the simplest method to save it as a "2-bit per pixel" image? Is it a binary image or something else (like a colormap image)? In the case of binary, ...
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1 vote
1 answer
2k views

8-bit gray image in gimp

I change the mode of my figure to Grayscale in the gimp and export it in the .eps format. But my output .eps figure still has CMYK mode. Is any other action that I most do to have a 8-bit gray image?
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scan/fax with text & numbers in black & white - how to improve/cleanup/enhance using Photoshop/GIMP?

I do not have a lot of experience with Photoshop or GIMP. I have a scanned or faxed document of an invoice/receipt that I am trying to submit to get reimbursed. I was mailed a copy with text that is ...
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5 votes
2 answers
3k views

Best Grayscale method for checking contrast?

While designing art assets in Photoshop, I've always tried to use the Grayscale method for checking the contrast levels. Unfortunately, different articles/sources recommend different methods of ...
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