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• kCGImagePropertyIPTCKeywords problem

  - by deepa

  Hi, I am developing an iPhone app in which I want to set the keywords for an image using ImageIO.framework. Following is the code snippet that I use for setting the keywords. But, it does not apply the keywords to image meta data. Could some one help me out in finding the problem here. NSMutableDictionary *iptcDictionary = [NSDictionary dictionaryWithObject: [NSArray arrayWithObject: @"Test"] forKey:(NSString *)kCGImagePropertyIPTCKeywords]; NSDictionary *newImageProperties = [NSDictionary dictionaryWithObject:iptcDictionary forKey:(NSString *)kCGImagePropertyIPTCDictionary]; CGImageSourceRef imageSource=CGImageSourceCreateWithURL((CFURLRef)imageURL, nil); //imageURL is URL of source image CGImageDestinationRef imageDestination = CGImageDestinationCreateWithData( (CFMutableDataRef)newImageFileData, CGImageSourceGetType(imageSource), 1,NULL); CGImageDestinationAddImageFromSource(imageDestination, imageSource, 0, (CFDictionaryRef) newImageProperties); if (CGImageDestinationFinalize(imageDestination)) [newImageFileData writeToFile:imagePath atomically:YES]; //imagePath is the path of the destination image with new metadata Thanks and regards, Deepa

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• Account for cancelling an update process

  - by Aerus

  I'm trying to develop the logic of updating my (Java) application but I'm stuck on a particular problem. The user can, at any time, be it on purpose (by clicking the Cancel button) or unwillingly (system/power failure) cancel the update process. If the updater was busy downloading files or unpacking files and thus didn't make any changes to the main application yet, this can be easily recovered by re-downloading the files and continuing the update process like normally. But, how can i account for changes made to the main application (i.e. a file was only partially replaced, some files were corrupted, etc.) that result in a main application that can't be launched anymore? Is it possible to rollback the changes made during the update without having to keep a full backup of my application or without doing a full reinstall? Are there any standards for updating an application that can help me with this?

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• Unsafe, super-fast cross-process memory buffer?

  - by John

  Cross-process memory buffers always have some overhead, and my understanding is this is quite high. But what if you're implementing a cross-process render-buffer, this isn't critically important in the same way as other data so are there techniques we can use to get 'raw' access to a chunk of memory from multiple processes, with no safety nets apart from it not crashing? Or do modern operating systems simply not work with unabstracted memory in a way to make this possible? I'm working in C++ but the question applies to Win XP/Vista/7, MacOSX 10.5+ (& Linux less importantly).

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• Can a process have two pid's?

  - by limp_chimp

  I'm studying computer systems and I've made this very simple function which uses fork() to create a child process. fork() returns a pid_t that is 0 if it's a child process. But calling the getpid() function within this child process returns a different, nonzero pid. In the code I have below, is newPid only meaningful in the context of the program, and not to the operating system? Is it possibly only a relative value, measured against the pid of the parent? #include <stdio.h> #include <unistd.h> #include <sys/types.h> #include <string.h> #include <errno.h> #include <stdlib.h> void unixError(char* msg) { printf("%s: %s\n", msg, strerror(errno)); exit(0); } pid_t Fork() { pid_t pid; if ((pid = fork()) < 0) unixError("Fork error"); return pid; } int main(int argc, const char * argv[]) { pid_t thisPid, parentPid, newPid; int count = 0; thisPid = getpid(); parentPid = getppid(); printf("thisPid = %d, parent pid = %d\n", thisPid, parentPid); if ((newPid = Fork()) == 0) { count++; printf("I am teh child. My pid is %d, my other pid is %d\n", getpid(), newPid); exit(0); } printf("I am the parent. My pid is %d\n", thisPid); return 0; } Output: thisPid = 30050, parent pid = 30049 I am the parent. My pid is 30050 I am teh child. My pid is 30052, my other pid is 0 Lastly, why is the child's pid 2 higher than the parent's, and not 1? The difference between the main function's pid and its parent is 1, but when we create a child it increments the pid by 2. Why is that?

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• Initiating background process for running php file as background from another php page

  - by Nalliappan

  I want initiate one php page as background process from another php page.

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• iphone best practice, how to load multiple high quality images

  - by bennythemink

  Hi guys and girls, I have about 20-ish high quality images (~3840x5800 px) that I need to load in a simple gallery type app. The user clicks a button and the next image is loaded into the UIImageView. I currently use [UIImage imageWithContentsOfFile:] which takes about 6 seconds to load each image in the simulator :( if I use [UIImage imageNamed:] it takes even longer to load but caches the images which means its quicker if the user wishes to see the same images again. But it may cause memory problems later with all that caching crashing my app. I want to know whats the best practice for loading these? I'm experimenting with reducing image file size as much as is possible but I really need them to be high quality image for the purpose of the app (zoomable, etc.). Thanks for any advice

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• executorservice to read data from database in chuncks and run process on them

  - by TazMan

  I'm trying to write a process that would read data from a database and upload it onto a cloud datastore. How can I decide the partition strategy of the data? I want to query the table in chunks and process each chunk in 10 threads. Each thread basically will send the data to an individual node on a 10 node cluster on the cloud.. Where in the below multi threading code will the dataquery to extract and send 10 concurrent requests for uploading data to cloud would be? public class Caller { public static void main(String[] args) { ExecutorService executor = Executors.newFixedThreadPool(10); for (int i = 0; i < 10; i++) { Runnable worker = new DomainCDCProcessor(i); executor.execute(worker); } executor.shutdown(); while (!executor.isTerminated()) { } System.out.println("Finished all threads"); } }

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• Get file size of BufferedImage before writing the data

  - by David

  I'm working on a Java program that needs to send an image (preferably in PNG format, though I could perhaps use another format if necessary) over the network. The logical way to do this is, of course, to first send the length of the PNG image data, then the data itself. Problem: I don't see any method in ImageIO or anywhere else that will give me the length of the image data. Does this exist somewhere in the Java 1.6 standard library? I know I could just write it to a ByteArrayOutputStream and get the length of the resulting array, but before resorting that I wanted to make sure I'm not missing something built in. And besides, that makes an extra copy of the image data, which I'd rather not do if it's not necessary.

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• C# - opening process and changig window position

  - by bartq

  I want to open from c# an application (standalone flashplayer) and set it position to (0,0) on the screen. How can I do this? So far I've managed to open flashplayer: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Diagnostics; namespace swflauncher { class Program { static void Main(string[] args) { Process flash = new Process(); flash.StartInfo.WindowStyle = ProcessWindowStyle.Normal; flash.StartInfo.FileName = "D:\\development\\flex4\\runtimes\\player\\10\\win\\FlashPlayer.exe"; flash.Start(); } } }

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• Is it possible to add layers to .tiff images with .NET?

  - by Voyta

  Are there any .NET libraries etc. which allow adding layers (with text) to .tiff images? Something like annotations, so that it would be possible to separate them from image afterwards. I tried DotImage - it allows to add annotations, save them as embedded into image and load them afterwards, but no one other image viewer seems to recognize that they are there.

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• Rails- MiniMagick commands not working

  - by digitalWestie

  I'm running windows xp and I've got MiniMagick and ImageMagick installed (latest versions). I'm now using the console to test out that everything works. Using the ms command prompt image magick works no problem. I'm testing this by using the identify command. Now, when I try to use MiniMagick from the console by entering image = MiniMagick::Image.new('image.jpg') It returns MiniMagickError, "ImageMagick command ("identify \"input.jpg\"") failed: {:status_code = #"'identify' is not recognized as an internal or external command,\noperable program or batch file.\n"} Can anybody help?

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• What to set the scalar type to contain a byte []. Entity in MVC2

  - by Brad8118

  I'm trying out the EF 4.0 and using the Model first approach. I'd like to store images into the database and I'm not sure of the best type for the scalar in the entity. I currently have it(the image scalar type) setup as a binary. From what I have been reading the best way to store the image in the db is a byte[]. So I'm assuming that binary is the way to go. If there is a better way I'd switch. In my controller I have: //file from client to store in the db HttpPostedFileBase file = Request.Files[inputTagName]; if (file.ContentLength > 0) { keyToAdd.Image = new byte[file.ContentLength]; file.InputStream.Write(keyToAdd.Image, 0, file.ContentLength); } This builds fine but when I run it I get an exception writing the stream to keyToAdd.Image. The exception is something like: Method does not exist. Any ideas? Note that when using a EF 4.0 model first approach I only have int16, int32, double, string, decimal, binary, byte, DateTime, Double, Single, and SByte as available types. Thanks

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• Detecting when a process has finished (but not exited)

  - by Egwor

  I have a program that's run in unix (that I have no control over) that when finished prints 'Completed successfully' but does not exit. I want to automatically detect when the process finishes (by checking the output of the command), so that I can kill the process and so that I can proceed do other activities. The complexity comes because I want to be able to run multiples of these scripts concurrently. (One activity I need to do requires the script to be called with various inputs, but each time the script runs it takes a while to return, and so I want to do them in parallel) Has anyone done something similar to this? I could redirect the stderr and stdout output of the command to a temporary file which has a random file name, then tail the file and pipe to grep for the end conditions (I.e. the certain log lines). The problem is, surely tail -f would keep running, and so it would never exit. Should I poll? If so, what's the best approach?

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• Block upload of executable images (PHP)

  - by James Simpson

  It has come to my attention that a user has been trying to create an exploit through avatar image uploads. This was discovered when a user reported to me that they were getting a notice from their Norton Anti-virus saying "HTTP Suspicious Executable Image Download." This warning was referencing the user's avatar image. I don't think they had actually achieved anything in the way of stealing information or anything like that, but I assume it could be possible if the hole is left open long enough. I use PHP to upload the image files, and I check if the file being uploaded is a png, jpg, or gif.

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• Find original owning process of a Linux socket

  - by Rob H

  In Linux and other UNIX-like operating systems, it is possible for two (or more) processes to share an Internet socket. Assuming there is no parent-child relationship between the processes, is there any way to tell what process originally created a socket? Clarification: I need to determine this from "outside" the processes using the /proc filesystem or similar. I can't modify the code of the processes. I can already tell what processes are sharing sockets by reading /proc/<pid>/fd, but that doesn't tell me what process originally created them.

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• dynamically scale images in php jpg/png/gif

  - by Patrick

  Is there a simple way of dynamically scaling an image in php? Id like to specifically use some kind of function where i can insert it into my heml such as <img src=image.php?img=boss.jpg&width=500> and of course it would then scale the image to whatever height constrains it to 500px wide i appreciate all input, thanks. EDIT does need to include jpg png and gif file types

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• Background subtracting in MATLAB

  - by eiphyomin

  I'm looking to do background subtracting on an image. I'm new to MATLAB and new to image processing/analysis, so sorry if any of this sounds stupid. 1) Other than imsubtract() are there other ways to do background subtracting (besides comparing one image to another)? 2) In the Math Works explanation for imsubtract() why do they make their structuring element a disk? This seems rather difficult so far because every time I try something, I end up not only subtracting the noisy background but also losing the parts of the image I want to look at!

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• C++ hook process and show status

  - by David

  Ok so I am learning C++ slowly. I am familiar with all the console syntax and everything, but now I'm moving on to windows programming. Now what im trying to do, is create a DLL that I inject into a process, so it's hooked in. All I want the C++ application to do, is have text in it, that says "Hooked" if it's successfully injected, and an error if something wrong happened. Or even if I can do it without a DLL, Just open an executable, and when the certain process I'm trying to hook is opened, the status is changed to "Hooked". Also I have a safaribooksonline.com account so if there is any good reads you would recommend, just write it down. thanks

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• Process incoming emails with script

  - by luckytaxi

  Remember iwantsandy.com? It was quite popular for what it did. ANyways, I'm looking to do something similar, but my question is, how does one process incoming emails? Let's assuming I'm using PHP or maybe even Ruby to do this. I would need a way to process the emails and dump them into a DB or something. Ok fine, but my main question is getting a script to kick off when an email comes in. I have a VPS so I have full control over my environment and it's running Centos.

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• C# - opening process and changing window position

  - by bartq

  I want to open from c# an application (standalone flashplayer) and set it position to (0,0) on the screen. How can I do this? So far I've managed to open flashplayer: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Diagnostics; namespace swflauncher { class Program { static void Main(string[] args) { Process flash = new Process(); flash.StartInfo.WindowStyle = ProcessWindowStyle.Normal; flash.StartInfo.FileName = "D:\\development\\flex4\\runtimes\\player\\10\\win\\FlashPlayer.exe"; flash.Start(); } } }

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• Process list on Linux via Python

  - by Madzombie

  How can I get running process list using Python on Linux?

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• Autostart application/process in WP7

  - by sv88erik

  How is it possible to auto start my application or run a process when the user turns on the phone. If you look at ex. Outloock WP7 included in the operating system then updates the icon so that you can see that there are new mail. This is a process in the background running. But I've read a bit about this now, but can not find out that this is possible using the SDK from Microsoft? Is it not possible?? If possible, how does one do that? Notice: I do not want any solution that involves jailbreak.

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• How to find text in images with the browser control+F

  - by Riga

  Have HTML pages with many sections and each section has a section title displayed as an image (to use nice font). The problem is that even if I specify an 'alt' and 'title' text on each image/title the Ctrl+F browser functionality does not find the text. Thought two possible solutions but not very happy about them 1) Use embed fonts. Problem: Can not find the font required by client to use and not sure about copyrights. 2) Have the text in the image in DIV near the image but hidden from user view. Problem: Can search engines consider this keyword stuffing? Will browser find text if display:none Does anybody has a better solution? Thanks Riga

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• Styling related issue in IE8

  - by Ajith

  I am using a background image to display as a button. The button shows up well in all versions of firefox, chrome, opera etc. However, the image fails to render itself in IE8. Only the image is not being shown, some of the other class styling gets applied such as width, height etc. Even more confounding is that in another page(though a different class and style sheet), an image of similar proportions gets displayed in similar usage. The image format is JPG. I'm copy-pasting the valid style attributes for both cases as shown by firebug below. None of the below buttons are displayed. button classes are applied as class="cart-button login", class="cart-button update", class="cart-button checkout" and class="cart-button continue" and are inside some divs. .cart-button{ height: 28px; cursor: pointer; border: none; float: left; } .cart-button:hover{ background-position: 0 -28px; } .login{ width: 58px; background:url(/../../templates/animalcare/i/login.jpg)no-repeat; margin:0 0 20px 0; clear: both; } .update{ width: 63px; background:url(/../../templates/animalcare/i/update.jpg)no-repeat; margin:0 0 20px 15px; float: left; } .checkout{ width: 77px; background:url(/../../templates/animalcare/i/checkout.jpg)no-repeat; float:right; margin:0 25px 30px 10px; } .continue{ width: 132px; background:url(/../../templates/animalcare/i/continue.jpg)no-repeat; float:right; margin:0 0 30px 0px; } The below is the only image button that gets displayed. It is located inside a table. It is in a different style sheet - hence the path difference. .add-to-cart{ width:102px; height:28px; float:left; background:url(i/add_to_cart.jpg) no-repeat; cursor:pointer; border:none; margin:10px 0 5px 0; } .add-to-cart:hover{ background-position:0 -28px; }

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• combining two png files in android

  - by John

  I have two png image files that I would like my android app to combine problematically into one png image file and am wondering if it is possible to do so? if so, what I would like to do is just overlay them on each other to create one file. the idea behind this is that I have a handful of png files, some with a portion of the image on the left with the rest transparent and the others with an image on the right and the rest transparent. and based on user input it will combine the two to make one file to display. (and i cant just display the two images side by side, they need to be one file) is this possible and how so?

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