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For a thumbnail-engine I would like to develop an algorithm that takes x random thumbnails (crop, no resize) from an image, analyzes them for contrast and chooses the one with the highest contrast. I'm working with PHP and Imagick but I would be glad ...
Started by tharkun on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
In the simplest way, ....
Find index of first and last non-zero value of L[] contrast = last - first
In looking for the image "with the highest contrast," you will need to be very careful in how you define contrast for the image.
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Hi,
My previous monitor had an accident and it seems he ain't coming back from the dead, which means it's time to pick out a new one.
My question is what does the "Contrast" value mean?
I normally see lines like:
Contrast: 1000:1
Or
Contrast: 15000:1
...
Started by Fork on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at superuser):
The larger the contrast the more values between these two extremes a high contrast monitor if you ....
Basically contrast is the measure of the difference between pure black ( # , if we were talking in hex codes) and pure white ( # ).
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I'm testing my company's established Swing application for accessibility issues. With high contrast mode enabled on my PC certain parts of this application are rendered properly (white-on-black) and some incorrectly (black-on-white).
The bits that are...
Started by banjollity on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Can check for the high contrast setting by calling the SystemParametersInfo function with the SPI.
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Ask your Facebook Friends
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The Windows 7 menu item highlight effect is quite subtle - on my machine, menu items go from light grey to having a light blue shading. This makes it quite hard to tell at a glance which exact menu item is highlighted at any one time. You can see an example...
Started by Barry Kelly on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at superuser):
I hate the taskbar color contrast.
It is driving me nuts, just install Ubuntu for this stupid decision of M$ .
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In modern LCD monitors, is there any noticeable difference between a 15000:1 (e.g. this monitor ) and a 50000:1 (e.g. this monitor ) contrast ratio? Or is it just marketing hype?
Same thing with a 2ms vs 5ms response time.
Started by mausch on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at superuser):
Wikipedia explains it better than I can:
The contrast year old NEC monitor (1880SX) that has a refresh....
You see colors you will probably never set them very high) .
Contrast ratio is something desirable to look for when purchasing a monitor.
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On one of pages we're currently working on users can change the background of the text displayed.
We would like to automatically alter the foreground colour to maintain reasonable contrast of the text.
We would also prefer the colour range to be discretionary...
Started by georged on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
In terms of sheer readability, you want to ....
Conversion forumlas are here.
So, convert your RGB value into HSV, add 180 degrees to H (modulo 360 degrees of course), and convert back to RGB .
You probably want to shift hue, but not saturation or value .
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I need to detect points of quadrilateral in a pretty high contrast image. I understand how I can detect large changes in contrast between 2 pixels, but I'm wondering what would be the best way to detect entire boundaries and corners of a quad in an image...
Started by Ben Daniel on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
The Hough Transform is a very useful algorithm for....
Have a look at AForge - it's got great computer vision capabilities that you can build on, and it's open source to boot, so even if it doesn't do what you want out of the box, you can get some ideas .
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In a Direct3D application filled with Sprite objects from D3DX, I would like to be able to globally adjust the brightness and contrast. The contrast is important, if at all possible.
I've seen this question here about OpenGL: http://stackoverflow.com/...
Started by x4000 on
, 7 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
To adjust contrast then you need to do similar but MULTIPLY by a constant if you blend a pixel with a value of (2....
A lot of games do increasing brightness(ish) of every pixel by 1 .
Increasing or decreasing the gradient alters contrast.
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Is there any such tool? For example, I want to see all styles applied for BODY tag. I know it does not make it readable. In my case, there are several options which can dynamically change CSS either through browser, or the source code(JSPs) or due to ...
Started by Aviator on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at superuser):
(Maybe....
Element in the tree
OS-provided high-contrast settings have nothing to do with CSS for system wide high-contrast settings.) I don't think you will find any tool that "adjusts" the CSS to make up for high-contrast settings.
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I want to change the brightness and contrast of a texture on the iPhone. I've been looking at the sample provided by apple ( GLImageProcessing ) but it only is able to do one at a time (calling both methods in the sample overwrites the previous result...
Started by Antti on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Here is my version, which combines the two half-and-half:
uniform sampler2D Texture; uniform float Brightness; uniform float Contrast; uniform vec4 AverageLuminance(texColour * Brightness, mix(AverageLuminance....
For adjusting brightness and contrast.
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