brightness

问题 I have tried this Windows example Getting WMI Data from a Remote Computer and this other Calling a Provider Method, and both work correctly in my computer. However I have tried to use WMI to change the brightness and I am getting an error on step 6, in this part: //Get the Next Object from the collection hres = pEnum->Next(WBEM_INFINITE, //Timeout 1, //No of objects requested &pObj, //Returned Object &ulReturned /*No of object returned*/); pEnum is a negative value. IMPORTANT: While I was

问题 I am porting an existing iOS app to Android. In a special use case, the (iOS) app uses the flashlight to indicate different states of a progress to the user (as the screen must be facing down). It is switched on just for approx. 3 seconds for two times. To make clear the progress even more / make it easier to differ, we want the intensity/brightness of the flashlight to be lower / higher between the states. The iOS app does that, but there seems to be no official or reliable way to control

问题 I use MATLAB for a series of experiments where each eye gets stimulated with a different motiv from the images (binocular rivalry), like on the one is a bottle, on the other a watch. There is a Toolbox to adjust the luminance and spatial frequency (Shine toolbox), but that does not work for images where the background is simply transparent, like .png/.tif/.bmp etc. Moreover, the background which shall stay transparent gets included in the analysis and matching routine so that the objects in

问题 i tried to use the most of the correct answers suggested by the users to adjust the brightness of the iphone (ie [[UIScreen mainScreen]setBrightness:0.0]; ) but the simulator didn't change its brightness. Is iphone simulator's brightness adjustable? 回答1: The iPhone simulator brightness is not adjustable, you have to try in a real device! 回答2: The iPhone simulator is not a hardware simulator. It simulates some of the hardware functions but mostly it is a simulator for iOS. You will need to

问题 I am developing a eBook reader app for iPad and i want to add a feature where in the user can adjust the brightness of the device from the app. Is there anyway in which i can implement this in my app..??? 回答1: I found rather a simple solution for it. I am adding a UIVIew of clear color to my book reader view and i am increasing the alpha component of this view upon the slider value changed event. By doing this , my view gets darkened and we get a feeling that the brightness of the app is

问题 My Question: I want to be able to change the brightness of a resource image and have three instances of it as ImageIcons. One at 50% brightness (so darker), another at 75% brightness (a little brighter), and finally another at 100% brightness (the same as the original image). I also want to preserve transparency. What I've tried: I've searched around and it looks like the best solution is using RescaleOp, but I just can't figure it out. I don't know what the scaleFactor and the offset is all

问题 I would like to increase the brightness of the screen using a seek bar within my Android application, but I'm not sure how to do this. How can I add this functionality? 回答1: Using this you can set the screen brightness: WindowManager.LayoutParams lp = getWindow().getAttributes(); lp.screenBrightness = 100 / 100.0f; getWindow().setAttributes(lp); Now, as you want to implement progress bar like control, i would suggest you to implement SeekBar, so using this you can easily increase/decrease

问题 Currently I am involved in an image processing project where I am dealing with human faces. But I am facing problems with the images in cases where the light source is on either the left or right side of the face. In those cases, the portion of the image away from the light source is darker. I want to distribute the brightness over the image more evenly, so that the the brightness of darker pixels is increased and the brightness of overly bright pixels is decreased at the same time. I had

问题 How can I change the adaptive brightness level programmatically, on Android Lollipop? I know how to change the manual brightness level , and to toggle on or off the adaptive brightness . It is done like that: Settings.System.putInt(cr, Settings.System.SCREEN_BRIGHTNESS, newLevel); However, with adaptive brightness is enabled, the OS combines it with another brightness level which is different than the manual one. Is there a way to do this? Target/min/max SDK is 21. 回答1: Don't know why but

问题 I'm making an app that needs to toggle the screen on/off when the user shakes the phone. So far, I've got a SensorEventListener that listens to the shakes as suggested in the answer to this question. When I detect a shake, I change the value of the screen's brightness as suggested in this question's answer. It all works great if I don't actually turn the screen off... if I set the brightness to 0.01f through the public void setBright(float value) method it works perfectly. However, if I set