2014/10/15 下午 10:09:02

iphone Programming Glossary: filters

Optimizing CLLocationManager/CoreLocation to retrieve data points faster on the iPhone

http://stackoverflow.com/questions/1081219/optimizing-cllocationmanager-corelocation-to-retrieve-data-points-faster-on-the

much time. My calculations are darn accurate the problem is it takes far too long to collect 10 samples. I'll paste my filters accuracy respective code below. If anyone can comment on how I can speed this up that would be great. Until I speed it up..

UISearchBar Sample Code [closed]

http://stackoverflow.com/questions/1302962/uisearchbar-sample-code

2 sections for countries visited and those to visit. Stanford's iPhone app programming class's 08 MyTableView sample filters a simple list of names. iphone uitableview search share improve this question WAIT Apple has implemented the Search..

How do you use a moving average to filter out accelerometer values in iPhone OS

http://stackoverflow.com/questions/2272527/how-do-you-use-a-moving-average-to-filter-out-accelerometer-values-in-iphone-os

unfiltered X Y accelerometer signals xf yf are the filtered output signals and k determines the time constant of the filters typically a value between 0.9 and 0.9999... where a bigger k means a longer time constant . Note that xf yf are the previous..

Instagram Image Filters on iPhone

http://stackoverflow.com/questions/3928862/instagram-image-filters-on-iphone

Image Filters on iPhone How does one go about adding image filters in an iPhone application similar to what Instagram and picplz have iphone objective c share improve this question Folks.. iphone objective c share improve this question Folks I have made an attempt at replicating instagram and photoshop filters using pure CoreGraphics and direct pixel manipulation not using OpenGL. Find this project at https github.com esilverberg.. and direct pixel manipulation not using OpenGL. Find this project at https github.com esilverberg ios image filters UPDATE You also should consider this project https github.com gobackspaces DLCImagePickerController share improve this..

Extract iPod Library raw PCM samples and play with sound effects

http://stackoverflow.com/questions/4796643/extract-ipod-library-raw-pcm-samples-and-play-with-sound-effects

an MP3 in the iPod Library so that I can play the song and manipulate the pitch tempo and apply sound effects such as filters . I have already gone down the route of AVPlayer and AVAudioPlayer which both do not allow very much control over the playback..

How to apply “filters” to AVCaptureVideoPreviewLayer

http://stackoverflow.com/questions/5156872/how-to-apply-filters-to-avcapturevideopreviewlayer

to apply &ldquo filters&rdquo to AVCaptureVideoPreviewLayer My app is currently using AVFoundation to take the raw camera data from the rear camera.. iPhone and display it on an AVCaptureVideoPreviewLayer in real time. My goal is to to conditionally apply simple image filters to the preview layer. The images aren't saved so I do not need to capture the output. For example I would like to toggle.. objects in the camera view but others have modified this code to do some neat video processing effects. All GPU based filters in this application that display to the screen run at 60 FPS on my iPhone 4. The only iOS device out there that supports..

Are the Core Image filters in iOS 5.0 fast enough for realtime video processing?

http://stackoverflow.com/questions/6625888/are-the-core-image-filters-in-ios-5-0-fast-enough-for-realtime-video-processing

the Core Image filters in iOS 5.0 fast enough for realtime video processing Now that Apple has ported the Core Image framework over to iOS 5.0.. Apple has ported the Core Image framework over to iOS 5.0 I'm wondering is Core Image is fast enough to apply live filters and effects to camera video Also what would be a good starting point to learn the Core Image framework for iOS 5.0 iphone.. a benchmark application as part of the testing for my GPUImage framework and profiled the performance of raw CPU based filters Core Image filters and GPUImage filters with live video feeds. The following were the times in milliseconds each took to..

How can you apply distortions to a UIImage using OpenGL ES?

http://stackoverflow.com/questions/9886843/how-can-you-apply-distortions-to-a-uiimage-using-opengl-es

and finally a pinch distortion using the GPUImagePinchDistortionFilter If you look at the shaders used for each of the filters you'll find that the math is very similar between them. You should be able to tweak that to produce your own custom effects.. should be able to tweak that to produce your own custom effects from this same base. It's fairly easy to apply these filters to UIImages. If you have just one filter you'd like to use you can do something like the following UIImage inputImage UIImage..