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Questions tagged [brightness]

An attribute of visual perception in which a source appears to be radiating or reflecting light.

Brightness is an attribute of visual perception in which a source appears to be radiating or reflecting light. In other words, brightness is the perception elicited by the luminance of a visual target. This is a subjective attribute/property of an object being observed.

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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
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how to get image brightness and contrast in jquery

Is there any way to get image brightness and contrast using jQuery ? I have to change Image brightness and contrast using Jquery.So first I want to see what is default brightness and contrast of image is.
user2307273
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how to use brightness and contrast of an image using jquery

I have a slider of brightess/contrast for a dynamically images.I am opening the image as i just browse it in input type = file.using jquery.I have slider input type=range .on sliding up increse brightness and on sliding down it will decrease…
abdul quadir
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Calculate perceived equal steps in color brightness

I've been trying to figure this out for a while, and it's driving me mad. As most people know, if you draw 10 rectangles next to each other, ranging from white to black in equal steps of HSV brightness, they will not be perceived equal to the eye.…
Ronze
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Change brightness on specified hours - twice a day

I have an array of specified hours for each day, when brightness should by changed for application which is awake 24/7. It happens twice a day. What I want to achieve is to find the most economical way of implementation that problem. Should I use…
pawegio
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Yellow and Orange color identifying with Android

Me and my project group are making an Paintball-like Android app. When you shoot someone it checks the following things: Is the opponent's color in the cross-hair (center of screen)? (either fluor yellow or fluor orange vests) Is their an opponent…
Kevin Cruijssen
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Android Autobrightness that works immediately

It's pretty easy to set the autoBrightness in Android, isn't it? Settings.System.putInt(resolver, Settings.System.SCREEN_BRIGHTNESS_MODE, 0); // 0 is manual, 1 is auto But if you are toggling: boolean isAuto =…
Twinone
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Is multiplying a BufferedImage to set brightness the right thing?

This is a question, wether I am using the right way or not. And by the right way, I mean, is there a more memory-efficient way to do this? I use 1 image source: String imgurl = "imgreadertest8.png"; BufferedImage loadedimage =…
Stefan Schouten
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How to get brightness level form UIImage

How can I get the brightness level form an UIImage. Actually I am trying to get brightness level and then set it to some other level (using GPUImage framework), So that I can pass that image to tessaract OCR SDK.
Saurabh
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Brightness always returns 255 when auto brightness is on in Android

I am getting 255 brightness when auto brightness is on in my phone (HTC Desire HD (2.3.3)). My code int value = Settings.System.getInt(c.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS); How can I get brightness level when…
Bhavesh Hirpara
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Get luminance from iOS camera

I want get luminance from camera, I've checked solution (count average luminance) obtaining-luminosity-from-an-ios-camera but camera automatically set exposure, so if it turn camera to the source of light (e.g. bulb) then in first time luminance is…
Adam Popławski
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Can a gesture recogniser control iOS display brightness?

I'd like to let the user control the brightness in an iOS app using a gesture recogniser to swipe up and down. Can gestures even control brightness? I've done it before using a slider and the brightness property of UIScreen... [UIScreen…
Ben
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Change brightness on Notification

Code for notification: mNotificationManager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE); final Notification notifyDetails = new Notification(R.drawable.ic_launcher,"New Alert, Click…
Karthik Balakrishnan
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android - How to disable auto brightness mode from API 4?

I can disable the auto brightness starting from api level 8. What about older versions? How can I disable auto brightness mode from API 4?
sara
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How to set brightness using phonegap?

While developing applications using HTML5 and Phonegap, is there any way to access or set the brightness of phone (Android)?
Pradip Kharbuja
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