Colors issue that is driving me insane. HELP!!

Solar2D General Questions/Discussion
#1

I save my artwork and graphics exactly as recommended in Corona’s Docs: png, 72 dpi, no embedded icc profile, 8bit depth.

The artwork looks identical on my mac display as well as my external display…wether it’s on Corona’s simulator, Xcode simulator, gimp, inkscape, preview. It’s all the same artwork same vivid colors. once i build the app and try it out on the iPhone …the colors looks very dead and washed out…the purple is blueish, and the blue is kinda gray and so on…

btw i’m using a macbook pro 13 inch (thunderbolt) + cinema led display 27inch running osx lion, and i test my games on iPhone 4 and iPhone 4S.

i’d really appreciate any help. i just wanna know what professional iOS developers do in order to create graphics that looks exactly the same on iPhone screen as it did while been created on the mac screen. surely with thousands of apps and games on the app store…they is a simple method.
:frowning: [import]uid: 67616 topic_id: 20457 reply_id: 320457[/import]

#2

8bit depth?
Are you sure?
Shouldn’t that be 24bit depth?

8bit color is 256 distinct colors maximum
[import]uid: 108660 topic_id: 20457 reply_id: 80159[/import]

#3

The 8bit, 16 bit, 24 bit, 32 bit colors you are talking about is something else…i’m talking about input depth not color bits…actually, if your png images are not 8 bit input depth the Corona terminal will give u the following warning message while building your app:

libpng warning: Warning: Input PNG does not have an 8 bit input depth. Please convert your PNG to 8-bit for optimal performance on iPhone OS.

Sorry if my post was not very clear, english is not my first language.
Could you please tell me how do u manage to get your art colors on iPhone display looks identical to the colors of the same art on the mac display?? have you ever run into such problem? [import]uid: 67616 topic_id: 20457 reply_id: 80161[/import]

#4

Update: i tried png24, and the problem persisted, and here is the amazing part…when i setFillColor a rectangle with a color i get the same results, different colors on the iPhone…which means the problem is not just in my artwork pngs…it’s in my monitors and i dunno how to solve that. [import]uid: 67616 topic_id: 20457 reply_id: 80297[/import]

#5

The thing is that images looks different on different monitors, thats a fact.

Have you calibrate your monitor? Thats the only way to make sure that your images will look the same, if they are displayed on calibrated monitors. But theres no way you can calibrate the iPhone screen, theres no option for that. But I have never felt or experienced that the iPhone screen is way out of line, when displaying graphics?

Graphics on my Mac and iPhone looks almost the same and I don’t have any problems. I am using PS and always exporting with 24bit depth. I don’t get any warnings from the sdk?

I have tried 8bit as well, but I can’t get get the transparency to look nice, always getting some pixel and it looks like crap :slight_smile:

Are you sure that you haven’t enabled any strange setting on the iPhone?

Regards, Joakim [import]uid: 81188 topic_id: 20457 reply_id: 80299[/import]

#6

Arent the iPhone set to use "negative" mode of view? Its like a photo negative.

Ive seen it one time on my settings I think and that would for sure "disturb" some images colors I believe.
Just my 2 cents,

Rodrigo. [import]uid: 89165 topic_id: 20457 reply_id: 80302[/import]

#7

What’s driving me crazy, some colors are identical… colors like purple or lime green looks blue and yellow, the rest looks almost the same.

i didn’t mess with the iPhone settings…and i never calibrated the mac display…it’s the same as the day i took it out of the box. [import]uid: 67616 topic_id: 20457 reply_id: 80303[/import]

#8

Strange, and the iPhone shows all other graphics nice, photos, web, etc?

Post a screenshot of the phone and simulator!

Joakim [import]uid: 81188 topic_id: 20457 reply_id: 80322[/import]

#9

That’s typically the kind of problems that happen when mixing RGB and CMYK but it should not happen if you work for screens and not print.

[import]uid: 95346 topic_id: 20457 reply_id: 80324[/import]

#10

I’ve read in a couple of forums ppl having a purple/redish tint on their mac display…and it’s the reason why colors looks different on their mac display from other devices and displays (they claim it’s a defect on some of the macs)… so i hooked up my mac to an external samsung hd monitor and guess what? the colors of my artwork looks very similar to the artwork on my iPhone, not exact but pretty close i’d say 90%…so for now i’ll work on the samsung monitor until i find a solution. [import]uid: 67616 topic_id: 20457 reply_id: 80325[/import]

#11

Great to hear!

Joakim [import]uid: 81188 topic_id: 20457 reply_id: 80338[/import]

#12

@bacteria,

I just stumbled onto this thread while looking for rgb to ryb conversion methods but in case you haven’t resolved your color correction issues, I use ColorMunki  http://www.colormunki.com/ as a solution.  I use it to calibrate my monitor and my laser printer so my digital life corresponds perfectly with my monitor, my prints and now my apps!

It’s not exactly a cheap solution for a hobbyist but perfect for a small business.

Jonathan

#13

@bacteria,

I just stumbled onto this thread while looking for rgb to ryb conversion methods but in case you haven’t resolved your color correction issues, I use ColorMunki  http://www.colormunki.com/ as a solution.  I use it to calibrate my monitor and my laser printer so my digital life corresponds perfectly with my monitor, my prints and now my apps!

It’s not exactly a cheap solution for a hobbyist but perfect for a small business.

Jonathan