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  1. K

    How to Color-Balance Field Photos for Accurate RGB Analysis in Photoshop

    I’m working in a lab studying how fruit color influences herbivory, and I need accurate RGB values from fruit photos to use as standardized data points. Each photo includes a color checker alongside the fruit specimen, but the photos were taken in the field under varying lighting conditions...
  2. M

    manually modifying RGB values

    Hi, at first I apologize in case this question was repetitive, I tried finding an answer in previous discussions, but I guess I don't even know how to call the operation I am trying to carry on. I am quite new to Photoshop. Substantially, I have many photos of a different subjects on a white...
  3. T

    Changing brightness/intensity without changing color map

    Hi I'm trying to brighten or change color intensity of a set of indexed tiffs with RGB palette. All the tiffs are composed of red channel only, aka all green and blue values of color map are 0. By simply using image->adjust-> brightness/contrast or level then save, the underlying color map...
  4. D

    Colours are different

    So, I'm a complete noob in photoshop. Ever since I've been drawing in PS I've been having the problem - the colours of my saved pictures were different from those opened projects. A quick google research showed that it's because the colour profile was not sRGB (which is a universal averaged...
  5. revnart

    Count all unique colors in image

    Hey, do you have any idea how to count unique colors in image? some kind of script, plugin or idea? Yes, I know I can use indexed color for images that have less than 256 colors, but I need to know if my image has more or less unique colors. My base file uses all of 16,777,216 possible color...
  6. S

    Working with Color Profiles

    I'm starting to gain a better understanding of color profiles and the "do's and don'ts" but I still have the odd state of total confusion !!! My workflow is RAW to LIGHTROOM to PHOTOSHOP to PRINT/WEB. I export as 16bit ProPhoto RGB TIFFs from Lightroom and finish editing in Photoshop where I...
  7. F

    conversion from rgb to cmyk black on every channels

    Hi ! Can someone helps me ? I've got a serious problem of conversion from rgb to cmyk. I often receive files (images and types) from clients made in rgb... they want to print their works in cmyk (separation process) from postscrip or any kind of process CTF, CTP... When using Adobe Photoshop, I...
  8. J

    undo batch process

    hi: I'd like to get some help in order to try to solve my problem. I've just run a batch process to convert RGB images into CMYK. The origin and destination folders were different ones. When I've run the process I've got CMYK images in both folders and lost the RGB ones I'd been working on for...
  9. M

    How to save 3 channels images into single channel

    hello everybody, I'm a beginner about photography but I have to solve an issue urgently. I have 4 multispectral cameras (GREEN, RED, BLU-NIR and RGB) that all return to me 3 channels images (actually jpg). Ok for RGB camera, but concerning the other ones (GREEN, RED, BLU-NIR) I need single...
  10. S

    Sepia in PS v7..?

    Help...I have photo's I'd like to render with a sepia tone: PS version 7 Shots are originally in color... Would a straight RGB value change do what I want, and IF so, what RGB values..? Should I convert to monochrome first..? The PS HELP page is totally useless to me, and does not give me...
  11. J

    scan in greyscale or RGB

    Is there a difference if I scan a black & white negative in greyscale and then convert to RGB in Photoshop or scan in RGB.Is there any advantage of one way over the other?
  12. Lannabulls

    Camera Raw 8.8 (how to read color values in LAB)

    Hi, while I was watching tutorials I noticed that, since Camera raw 7 color values can be read in rgb default as well in lab, how to change the setting from default rgb to lab? For windows users and Camera Raw 8.8, a friend of mine told me to clik (mouse right) on the histogram pannel while...
  13. pslane

    color tools

    Quick question: What can be the problem when the color tools don't work? I've already checked to see if it's in a color mode and it set on RGB and 8 bits. I've tried Color Balance and Hue and Saturation with no luck and they are rasterized. Thanks pslane
  14. R

    Is there an authoritative data source for named colors?

    My niece wants me to make return-address labels for her in Photoshop. When I asked if she has anything specific in mind, she said that she likes the colors Turquoise and Sea-Foam Green (although not necessarily using them together in the labels). Sounds simple enough, but what, exactly, are the...
  15. T

    Have I misunderstood digital colors?

    I'm trying to understand things like saturation and vibrance, and have found that I need to improve my understanding of digital colors. (Lets stick to RGB and 8 bits) I have just read, about Prophoto RGB, that it contains colors the human eye cannot see. I know there are several million...
  16. pslane

    Remove/undo Channel Mixer?

    I was starting a tut and had to open an image provided. When it opened, it was a channel mix image (if that's what you call it). 4 layers RGB, Red, Green, Blue. How do I get this image back to one RGB layer? Can I? Never had this happen before. I can send more info if needed. Thanks pslan
  17. G

    RGB to CMYK issue

    Hi there! im having an issue when I convert my photo to CMYK from RGB in photoshop. The colour loss is huge, which is a shame but something I can adjust, however the other issue is that it's actually losing a lot of the detail with it. It's giving it the kind of effect you have when you whack...
  18. F

    Colour alterations thru deleting channels

    Hi, I am very fond of Colour alterations on a photo through manipulating RGB or CMYK channels. I recently stumbled upon a method that gave a rather very interesting colour effect I think. I deleted the blue channel out of my RGB image, that left me with cyan and magenta channels. However the...
  19. P

    Turning a Dataset into a Color Library

    We have a project where the final media will have a color palette limited to 454 colors. We have a conversion from the media's color selection to RGB. So, from an XML file I created a CSV file, meaning I have both if necessary, of 454 colors with a name and their RGB values. I need to create...
  20. M

    Raw to JPEG much darker conversion.

    Hey Guys, I am a freelance Photographer who primarily shoots night events (shows, clubs, etc.) and I am having some issues with my images coming out darker when I save them as JPEGS. I am shooting with a Canon 60D (Adobe RGB) and at the moment editing the photos in the Adobe RAW Editor (Adobe...
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