Stack Overflow
Stack Overflow

Questions tagged [contrast]

the difference in color and light between parts of an image

281 questions
0
votes
1 answer

makeContrast between two different sets of data

I need to find differentially expressed genes between 35 lines (in microarrays). 30 lines' names start with RAL and 5 lines' start with ZI. I want to make contrast between 30 RAL lines and 5 ZI lines. Since I don't want to type manually all 150, I…
user2091290
  • 13
  • 3
0
votes
2 answers

CONTRAST for CLASS variable with more than two levels in PROC GLM

Background: When we test the significance of a categorical variable that has been coded as dummy variables, we need to simultaneously test all dummy variables are 0. For example, if X takes on values of 0, 1, 2, 3 and 4, I would fit dummy variables…
Meg
  • 696
  • 1
  • 7
  • 20
0
votes
2 answers

How do I randomly generate number to change contrast of a UIImage?

I need to randomly generate the contrast of a UIImage. How do i do so? Also if you could tell me how to do the same for hue, brightness, sharpness, saturation, ect.
MikeE
  • 41
  • 1
  • 5
0
votes
1 answer

MATLAB "CCTV" image processing, contrast filtering/feature detection

I'm a bit of a noob in MATLAB (and image processing in general) and I'm wondering if you can help me with a bit of an issue I'm having. Essentially, I'm given an image of an alley, and then multiple images of the same alley, but with different…
ChuckProuse
  • 1
  • 1
0
votes
1 answer

Testing hypothesis from linear model n R

I am very new to R, and after reading several search results still couldn't figure out how to test different hypothesis from linear models in R. I have 3 replicates each from 3 plots (treatments). I want to test the hypothesis P2 > (P1+P3)/2 with…
Alpesh Querer
  • 3
  • 1
0
votes
0 answers

GPUImage for large sized image

I am using GPUImage framework for adding filter Effects that change the contrast,brightness of the image. When i tried to change the contrast,brightness for large sized image it is pixelating the original image. The quality of the image is gone. …
Manikandan
  • 321
  • 2
  • 12
0
votes
1 answer

HCM (High Contrast Mode) white vs black detection

Does anyone know a jquery or javascript method or methods for testing hcm; whether it's black or white? I have an image on my site that shows up under normal circumstances, and an image that shows up under black, but need to detect if HCM is set to…
Highspeed
  • 442
  • 3
  • 18
0
votes
1 answer

Better performance for ffmpeg decoding editing image contrast for every frame

i'm developing an rtsp player using ffmpeg library and i must edit contrast image for every frame of video, searching the web i found this code for edit contrast : - (UIImage*)contrast { CIImage *beginImage = [CIImage imageWithCGImage:[self…
Simone M
  • 677
  • 1
  • 10
  • 26
0
votes
1 answer

How to set colors to a specific contrast ratio?

I am working on a project and I have a request to set the footer to a 4:5 contrast ratio. I've never had to alter this, so after searching I found this neat tool that lets you fiddle with the colors and see a contrast ratio you get.…
vpoola88
  • 3,669
  • 4
  • 20
  • 21
0
votes
1 answer

Any cross-platform method to change the brightness/contrast of the monitor display?

I spent several hours on Google, but in vain. Is there any library or something which can reduce the brightness of the screen ? Or the contrast, or maybe add some tint ?
Shravan
  • 2,809
  • 2
  • 18
  • 39
0
votes
1 answer

contrast of an image in vb2005

Adjust the contrast of an image in C# efficiently solution for above question is not working in vb 2005 i need solution in vb2005 this is c# code below public static Bitmap AdjustContrast(Bitmap Image, float Value) { Value = (100.0f + Value) /…
Dandy
  • 467
  • 1
  • 10
  • 33
0
votes
3 answers

HTML5 video is blurry and low-contrast ONLY in my installation of Chrome

I am in Windows 7 x64, using Chrome 22. When I view an MP4 video in the video tag, it appears blurry and low-contrast compared to the source video viewed locally in Media Player Classic. A screen-measuring app shows that both players are displaying…
dbplunkett
  • 153
  • 1
  • 3
  • 12
0
votes
1 answer

Develop image contrast,sharpen,warmth,crop,undo,redo functionality in asp.net c#

I want to develop image contrast,sharpen,warmth,crop,undo,redo functionality in my web application. Please tell me how can I develop this functionality ? I dont want to use .GetPixel() and .SetPixel() because it is very slow metho. so please tell…
Neel Patel
  • 11
  • 1
  • 2
0
votes
1 answer

iOS: Increasing contrast on Tab items

It is difficult to see my tab item images and text with the dark blue background I am using as you can see in this image. Is there a way to make them more bright when not selected?
Ian Vink
  • 66,960
  • 104
  • 341
  • 555
0
votes
1 answer

Contrasting layer in JavaScript / HTML

Base of my web application is a map, consisting of a lot of pale tiles. So result of printing this page using B/W printer is very grievous. Is there any possibility to lay on some layer on the map, which will make it more contrasting? (Replacing…
Konstantin Likhter
  • 910
  • 1
  • 6
  • 8
1 2 3
…
18
19