image-manipulation

I'm looking for a way to implement image zoom and scrolling the way it is implemented in Droid Comic Viewer . Is there any quick way to do that? If not, then could you please give some advices at least on implementing kinetic scrolling. It wasn't quick for us. When we implemented that part of Droid Comic Viewer we used the source code of ScrollView as reference to create a view able to handle horizontal and vertical scrolling. Scrolling and zooming have a lot of quirks that we gradually solved, and some of them that we still have to solve. If you're not in a hurry, we plan to release the

We are capturing a visible tab in a Chrome browser (by using the extensions API chrome.tabs.captureVisibleTab) and receiving a snapshot in the data URI scheme (Base64 encoded string). Is there a JavaScript library that can be used to scale down an image to a certain size? Currently we are styling it via CSS, but have to pay performance penalties as pictures are mostly 100 times bigger than required. Additional concern is also the load on the localStorage we use to save our snapshots. Does anyone know of a way to process this data URI scheme formatted pictures and reduce their size by scaling

Background I am working on an implementation of the " KenBurns effect " (demo here ) on the action bar , as shown on this library 's sample (except for the icon that moves, which I've done so myself). In fact, I even asked about it a long time ago ( here ), which at this point I didn't even know its name. I was sure I've found a solution, but it has some problems. Also, since I sometimes show the images from the device, some of them even need to be rotated, so I use a rotatableDrawable (as shown here ). The problem The current implementation cannot handle multiple bitmaps that are given

What's the best re-sampling algorithm I can use to divide an image into half its original size. Speed is of primary importance but it shouldn't degrade quality too bad. I'm basically trying to generate an image pyramid. I was originally planning to skip pixels. Is this the best way to go? From what I've read the image produced by pixel skipping is too sharp. Could someone who has tried this comment. My images contain map data sort of like this. Mark Ransom Skipping pixels will result in aliasing, where high frequency changes (such as alternating light/dark bands) will convert to low

Are there any image libraries available for Android as seen in http://www.jhlabs.com/ip/filters/index.html ? Or have some one ported the same? Thanks in advance. I didn't try the code yet. but I run the sample app. I think it is good to use, https://github.com/finebyte/android-jhlabs I know this is an old topic, but in the absence of the AWT libraries I have started porting some image filters from the Marvin Image framework ( found here ) I have set it up as a googlecode project here so feel free to go check it out. Samsung S Pen SDK Has image filters. The filters are implemented for ARM

I'm trying to create an image mask that from a composite of two existing images. First I start with creating the composite which consists of a small image that is the masking image, and a larger image which is the same size as the background: UIImage * BaseTextureImage = [UIImage imageNamed:@"background.png"]; UIImage * MaskImage = [UIImage imageNamed:@"my_mask.jpg"]; UIImage * ShapesBase = [UIImage imageNamed:@"largerimage.jpg"]; UIImage * MaskImageFull; CGSize finalSize = CGSizeMake(480.0, 320.0); UIGraphicsBeginImageContext(finalSize); [ShapesBase drawInRect:CGRectMake(0, 0, 480, 320)];