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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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How to increase the brightness of images in appcelerator?

I am developing an ios app,In that I have requirement To provide the brightness to the images.So Using opacity i am providing the brightness. I put opacity maximum value 1 Still i am not happy with that brightness Is their any way to increase the…
suresh
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This value is apparently giving me a zero?

The assignment asks for : "Rename the setLuminance method as blend and have it take two pictures as parameters: the foreground and the background. Sequence through the pixels of the foreground and background simultaneously (assume they are exactly…
alnmod
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React to iPhone camera changes

I'm searching for a way to analyze the camera's view live. The iPhone should recognize and react to sudden changes in brightness. How should I go about it?
choise
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Android- How to set brightness to textView?

I am working on a night light app. I want to apply brightness to a textView. I know how to set screen brightness but i am unable to figure how to set it on a textView.
Ali Farhan
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Change brightness of application

Is it possible to programmatically change the brightness of a C++ Builder/Delphi styled application, without actually changing the style and loading it back in real time? Could not find anything like a master brightness setting. Note I do not want…
Mike Versteeg
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Android Screen Brightness Lock

I am creating an android application that needs to keep the device awake (will not lock) like this: please help me to add the "Screen light lock" check-box in my settings activity. (in java, adt bundle eclipse) Sorry for my poor English.
Amirhossein Mahdinejad
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RGB retrieval of a coloured image

I am trying to do some image processing on a coloured image and for me to do so I need to separate the RGB values and modify them separately. I am just implementing a increase in brightness filter. I am doing this in java. Can someone help me out…
cory baxter
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how to create an image in matlab (if possible) from matrix?

The problem is the following: I have a .txt file containing 3 columns of numbers. The first 2 columns are the coordinate x,y of the points. The third columnn (z vector) is made of numbers that express the luminosity of each point. (The .txt files…
Lamberto
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How to call the UI for screen brightness

I use this code to change the iPhone screen brightness: - (void)setLightValue:(CGFloat)lightValue { [UIScreen mainScreen].brightness = lightValue ; } However this code doesn't call the brightness UI of the iPhone screen. I want something like…
user5465320
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Android development with sensor accelerometer and brightness

I'm developing an app that uses the sensor accelerometer. I want the display to go black for instance when a value reach 8.1 and go back to normal when 7 is reached. Is it possible without using screen brightness? I want it to be complete black and…
Thun
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Ubuntu brightness can't be adapted after upgrading to 13.04

Today I upgrade my ubuntu to version 13.04 from 12.10, however , the brightness can't be adapted. I have tried the previous kernel which worked on version 12.10, brightness can't be changed too. My PC is Acer 4750G. My boot parameter: RAMDISK$ cat…
river
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Can't control brightness on acer V3 (LINUX)

I have one problem with linux mint and my conputer ACER v3, I can't control brightness, why?
edvinedi
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How to control Brightness of a LED using c in RL78 Micro Controller?

As i am using a RL78 micro controller , i need a C code for controlling the brightness of a led.i have searched in the internet ,but of no use.... only some datasheets are provided.There is no exact calculation of duty cycle for PWM also,if anyone…
user3749242
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