Preserved Topic: How do I...? (Page 1 of 1)

Hi, I'm trying to figure out something that should be easy with this type of power, yet I can't find out how to do.

I'm working with a bitmap image file, and all I really want to do is delete certain color pixels out of the image while keeping the rest of the colors intact. Like say, I used Paint and I used the spray tool to make a cloud of random different colors, like red, blue, yellow, and green. I want to either delete or switch the green pixels with another color (either way is fine) in that cloud but still keep the other three colors intact...is there anyway to do this in Photoshop? Is there a plugin I should install?

Please help! (P.S., the file's a 24-bit .bmp file)

Well you could simply go with a SELECT>>>COLOR RANGE and then tweak the threshold to make a selection of the area you want to change.

Or, you could use IMAGE>>>ADJUST>>>HUE AND SATURATION choose the channel you want to adjust, and then tweak the hue changes you want to make.

Or...


Or...


There really are a great number of options for achieving this effect...though the one thing you need to know: Read The Fuckin' Manual.



Peter

read what?

Ah, I remember using those little options.

They didn't work too well (except Color Range, but it still didn't work as well as I wanted to...colors that I wanted kept were still being removed no matter how much I tweaked the options. Oh yeah, and I don't know what Fuzziness does either. Hue and Saturation just switched the values, like you said, but it wouldn't turn the hue I wanted to change completely white). I also used Filter>Extract, but that didn't do so well either, since the whole image is on a VERY LONG strip...too long to highlight everything well, and in any case, parts of edges were removed anyway.


Oh, and yes, I beseeched the manual as well...23 times to be exact. Didn't exactly help me either, since I'm obviously new at the program and the help files aren't very user-friendly.

I asked here because it's much better to find intelligent people who can help identify the problem and give advice and/or other solutions, rather than spending hours on end blundering about with the search option in the help files.


Oh, and thank you for that rather colorful comment and I do hope you have a good day, sir!



~Jojo

Those 'little options' will work. Try a little harder and you just might figure it out.


[This message has been edited by warjournal (edited 04-22-2003).]

Welcome to the funny farm, Jojo64

Try sliding the Fuzziness slider back and forth to see if it helps your selection.

Try making a selection from the green channel.

quote:

---

...rather than spending hours on end blundering about...

---

While it's always good to have help from people, and I've picked up some tips I would have never figured out on my own, never discount the importance of those hours of blundering about! They're how I learned to use Photoshop.

The tips you've gotten are good starts, and playing with them some more is probably a good idea. While you're in their, go ahead and try out a few of the other options in the 'image > adjust' menu, and the 'select' menu.

You could also try starting with the magic wand, making sure that the 'contiguous' option is not checked.

Image->Mode->Indexed Color

Select Palette: Custom

In custom mode, you can replace any color with any other color.

Since you're working with a flat file anyway, this should be a good solution.

Or ot select all of one colour in an image, zoom into your image until one pixel fo the colour you want looks large enough for you to cinfidently click on only it...

Next, pull out your magic wand tool, and alter it settings to set tolerance to 0, turn anti-aliasing off and turn 'contiguous' off...then click on the pixel of your colour. Boom, every pixel that exactly matches that colour in your entire image will be selected.

Thanks everyone, for your help...the advice you gave worked with similar results, although some took longer than others (I was looking for a relatively faster way to do this, you see) And you were right about the blundering about part, DL-44: I found the Replace color option, which made the work a LOT easier to do (although I should try the tip that Skaarj gave...I tried everything else except that)

Edit: Ah, Skaarjj's advice is EXACTLY what I was looking for! Thanks!

[This message has been edited by Jojo64 (edited 04-24-2003).]

Skaarjj rocks.