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covewi
01-21-2015, 10:11 PM
What is the ideal matrix aspect ratio to display both text and graphics for our house displays?
The width and height.

toozie21
01-21-2015, 10:23 PM
That's a good question I'd like to hear some thoughts on. Mine was designed for text first and is 73 pixels wide by 20 tall. I am thinking of adding another 6 rows this season to make it a hair more boxy so I can do more with images.

My gut says for good images or videos, to have something 4:3 or 16:9 ratio. For me, that would mean a 36 wide by 26 tall to roughly keep to 4:3 (so roughly half my matrix)

Short and badly typed since written from my phone...

angus40
01-21-2015, 10:37 PM
16 x 9 > ish . this is what we have all become custom to .

I tried to stay as close as possible to it @ 63 x 32 . that said spacing is another aspect to consider for optimal resolution .

covewi
01-22-2015, 11:32 PM
Want to make a matrix 65 X 30 = 1950 pixels.
Want to use 1 SansDevice e682.
Would this be the setup I would use in xLights / Nutcracker?
27233

Then does each of those 10 channels get plugged into the first 10 inputs on the e682?
I am trying to get a quickly caught up here as my pixels are being ordered and materials gathered.

Thanks

toozie21
01-23-2015, 09:01 AM
In my 73x20, I have 10 strings that are zig-zagged to make 20 rows. The e682 is configured to know about the zig-zagged and handle it. Because of this, you don't need to bother NC with the zig zags as it is being handled in the e682 at the hardware level.

Short and badly typed since written from my phone...

toozie21
01-23-2015, 09:07 AM
Here is a thread when I was setting up my matrix and was confused myself: http://www.doityourselfchristmas.com/forums/showthread.php?p=329951
My confusion came in because some of the terminology between NC and e682 don't translate. Hopefully the thread will be helpful.

Short and badly typed since written from my phone...

covewi
02-02-2015, 02:28 PM
Ordered WS2811 pixels form DIYLEDEXPESS and cant wait to start my pixel matrix. I decided on a 16:9 ratio.
So I am going to make a 72" X 40 " matrix with 2" pixel spacing. Will that aspect ration work well for text and graphics?

Thanks

toozie21
02-02-2015, 02:30 PM
I assume you went with strings and not, strips?

covewi
02-02-2015, 03:19 PM
Yes strings. That size matrix will fit well on the front of the house and I should have enough pixels left over to make a 6' matrix tree.

toozie21
02-02-2015, 03:41 PM
What is the viewing distance (from where people will be sitting/standing) to where your matrix will be? The further away, the bigger ratio you can get away with.

covewi
02-02-2015, 06:44 PM
Probably around 40 -50 feet. Will that size / ratio work for both text and images?

covewi
02-02-2015, 09:34 PM
Is this math correct?
16:9 aspect ratio X 4.5 = 72:40
72" X 40"
Pixel every 2 inches 72/2 = 36 pixels
Pixel every 2 inches 40/2 = 20 pixels
36 pixels X 20 pixels = 720 pixels needed

toozie21
02-02-2015, 09:48 PM
Your math looks good to me. An easier way to think about it in my mind is that 16:9 is 1.7778:1 16/9). So if you want 36 pixels wide, that would mean you need 36/1.7778 = 20 pixels tall.

Also, a minor detail, but 20 pixels spaced 2in apart will be 38in tall. And your width will be 70in wide. No biggie, unless you are planning on it being exactly 72x40....

I bed text and pics would work fine, but you might want to check with some of the folks who covered their houses or had megatrees to see what they think of the 2in spacing.

Short and badly typed since written from my phone...

covewi
02-03-2015, 06:37 PM
What do you think ?
I have enough pixels to go with 1.5 inch spacing instead of two inch. Which would you choose and why?

JonB256
02-05-2015, 03:08 PM
40 X 30 with 2 inch spacing has worked well for me. At 35 to 40 ft viewing, some people think I have a projector.

Skunberg
02-05-2015, 10:35 PM
What do you think ?
I have enough pixels to go with 1.5 inch spacing instead of two inch. Which would you choose and why?

I don't get it, if you have 1950 pixels for a 65 x 30 matrix you can use any spacing, 1 inch, 1.5 inch, 2 inch, 6 inch or any other spacing. The difference would be how much space it takes on the wall and how it looks from the street. So wouldn't viewing distance dictate the best spacing rather than amount of pixels?

covewi
02-06-2015, 12:32 AM
I really had no idea of how to pick the best pixel pitch (distance between pixels) for different viewing distances. Guess I should have used Google more.
Here's what I found.

Optimal viewing range is based on legibility of the smallest “standard” (seven pixel height) alpha‐numeric
character for any given display pixel pitch. LED message centers are very dynamic and the viewing
distances in the chart below are for general reference. Using different font types and styles can affect the
legibility of the display greatly.

With enough distance, virtually any pitch of display will blend into a continuous image – where pixilation
(seeing individual diodes or pixels) is no longer present in the display.

If a user is only displaying text, pixilation may not be a large concern. However, this usually becomes a
much bigger issue if the user is intending to run images or video on the display.

27463

A 25mm pitch is roughly 1 inch.

toozie21
02-06-2015, 06:50 AM
Nice chart, I wish it had values larger than 25mm though!

Short and badly typed since written from my phone...

covewi
02-09-2015, 06:29 PM
Putting together some info for designing graphics and text for pixel matrix's. I do have a question - instead of just having a colored text on the matrix how can I get a colored background and a different color text - like the examples in the image below?

KEEP IT CLEAN

Avoid using thin fonts as well as most script fonts. The strokes of each character are simply too thin to maintain legibility over long distances. Use thick, heavy fonts to maximize readability. The bold option is an excellent way to add weight to your wording.
KEEP IT COLORFUL

High color contrast is a key ingredient. Just like using large text, the right color combination can make your message readable from a much longer distance. Refer to the sample below for many of the best text color vs. background color combinations for your electronic sign.

27523

angus40
02-09-2015, 07:43 PM
Putting together some info for designing graphics and text for pixel matrix's. I do have a question - instead of just having a colored text on the matrix how can I get a colored background and a different color text - like the examples in the image below?

KEEP IT CLEAN

Avoid using thin fonts as well as most script fonts. The strokes of each character are simply too thin to maintain legibility over long distances. Use thick, heavy fonts to maximize readability. The bold option is an excellent way to add weight to your wording.
KEEP IT COLORFUL

High color contrast is a key ingredient. Just like using large text, the right color combination can make your message readable from a much longer distance. Refer to the sample below for many of the best text color vs. background color combinations for your electronic sign.

27523

You do not say what app or sequencer you are using but >

This is very simple if you use an app like Ae .

Use the text tool and you can change attributes at will .

add bakground layers of any color , texture or stylized as you like .

ez stuff :)

covewi
02-09-2015, 08:02 PM
Angus40

Thanks for the suggestion... last year I was learning AE for projection mapping and you were very helpful with my questions.
I can do what you suggested... it never crossed my mind...I have just been using Xlights / Nutcracker for text... but need to expand my thinking.

How do I judge what size font / background etc to use in AE for a matrix that will be 72"X 40"?

angus40
02-09-2015, 08:18 PM
When in Ae , think of your screen size as being your actual matrix :) when you export your image sequence or mpeg etc. to be used in Xlights-Nutcracker you set your render attributes (aspect rezize ) to suit your matrix dimensions .

covewi
02-09-2015, 08:30 PM
Photoshop has become my friend - easier for me than AE to make colored text / backgrounds...thanks for your help.
27548,27549

covewi
02-12-2015, 12:44 PM
A few more guidelines for matrix design...most digital billboards suggest 20" letters when viewed at 100 feet...so 10 " at 50 feet would be correct for most viewing situations from the street.

BLACK BACKGROUNDS: For digital billboards, black is the absence of color. Black is created with the use of less light. White is the blending of all colors
and the use of more light in digital billboards. Using a black or dark background will inevitably increase contrast, therefore strengthening legibility and
enhancing the impact of your advertisement.

First color choices:
Red
R=255
G=0
B=0

Green
R=0
G=255
B=0

Blue
R=0
G=0
B=255

Yellow
R=254
G=233
B=0

Orange
R=255
G= 88
B= 0

Purple
R=182
G=52
B=187

COLOR EMOTIONS EVOKED
Red - Stimulating, exciting, provocative, dynamic
Red Orange - Domination, aggression, and action
Orange - Friendly, vital, playful, energizing, inviting
Yellow Orange - Illumination, wisdom, and wealth
Yellow - Sunny, warming, cheerful
Yellow Green - Sickness, cowardice, discord, and jealousy
Green - Soothing, nature, refreshing, healing, fresh
Blue Green - Emotional healing and protection
Blue - Cool, quiet, serene, constant
Blue Violet Uniqueness, preciousness, royalty, and sacredness
Violet - Creative, regal, spiritual, mysterious
Red Violet - Energetic, happy, sweet, romantic, youthful
Black - Strong, classic, elegant, mysterious

Skunberg
02-12-2015, 03:13 PM
I'm not sure that letter size to distance is a straight line, more likely a curve.

Micromutt
02-12-2015, 03:33 PM
http://doityourselfchristmas.com/forums/attachment.php?attachmentid=27463&stc=1
A 25mm pitch is roughly 1 inch.

So at 40' or less we may as well hang a TV on the house? 6mm = 0.23622"
:wacko:

ChristmasBuddy
02-16-2015, 09:02 AM
I like the colored table! I understand that that the top row signifies the appropriate viewing distance but what does the mm column mean? The distance between pixels on the matrix itself?

Looking for clarification. Thanks!

Buddy