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  • Get image pixels of prescribed color

    - by ohadsc
    Hi, I have an image (PNG or JPG) inside which there is at least one pixel of a certain RGB color I know in advance I want to find the pixel(s) of that color For example, I may have image.jpg inside which I know some pixel has the RGB value 255,100,200. I want a program that will give me the list of pixels (if any) of that color in the image Anyone know of a tool to help me with that ? Thanks !

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  • Paint.NET equivalent for Linux?

    - by Macha
    On Windows, my favorite image editor is Paint.NET. However, on Linux, GIMP is as unfriendly as photoshop despite having less features. (i.e. It takes ages to load, their's far too much stuff). Most of my image editing is simple things where Photoshop or GIMP would be overkill. Paint.NET does not run on Wine or Mono. So is there any similar fast and simple but powerful image editor available for Linux? EDIT: There is a Mono version available, but I don't want to have to deal with installing svn versions of mono, and compiling the version myself.

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  • how to install npm if couldn't resolve npmjs.org

    - by Rahul Mehta
    when m doing curl it says could not resolve host what can i do ? curl http://npmjs.org/install.sh | sudo sh curl: (6) Couldn't resolve host 'npmjs.org' http://npmjs.org/ /etc/resolv.conf search x1 nameserver x2 nameserver 8.8.8.8 nameserver 8.8.4.4 nslookup result nslookup google.com Server: x1 Address: x1#53 Non-authoritative answer: *** Can't find google.com: No answer Non-authoritative answer: * Can't find google.com: No answer

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  • Photoshop: HSL Color picker plugin?

    - by Ian Boyd
    Is there a plugin that can let Photoshop use a HSL color picker, rather than HSV (which Adobe calls HSB)? In other words, any/all of the following locations could have an HSL option: Or perhaps a plugin with it's own color picker. Reference RGB HSL HSV (aka HSB) ============= =============== ================ (1, 0, 0 ) ( 0°, 1, 0.5 ) ( 0°, 1, 1 ) (0.5, 1, 0.5) (120°, 1, 0.75) (120°, 0.5, 1 ) (0, 0, 0.5) (240°, 1, 0.25) (240°, 1, 0.5)

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  • Product Recommendation: Good job scheduler for windows servers?

    - by Bret Fisher
    Looking for a mostly-GUI tool that is low cost (less then $1k, but not required) and allows you to create scheduled tasks and jobs without writing vbscript, batch files, or powershell. Something simple that speaks SMB/CIFS, SMTP, LDAP, etc. for such things as "delete some files based on a list of folders from this text file" or "disable all users with expired accounts" or "delete all disabled users not in this AD group". I've seen some of the big multi-OS enterprise task automation systems and they just look way overkill. We're a windows-only shop, Server 2003 or newer and there's got to be a simple non-agent based product that is drag-n-drop for some of this basic automation. Today we use all three languages mentioned above, and the scripts are not as reliable as a workflow-based-tool would be. Thanks.

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  • Does anybody wish to help a poor researcher publish a paper?

    - by Mihai Todor
    I don't know if this is a good place to beg for help, but here it goes: basically, I need to run a secure recommender system simulation (C++ console application) in order to meet tonight's deadline, and the faculty's server grid decided to go offline. I could really use something like 10+ (actually, about 16 would be required to meet the deadline) virtual instances of some Linux that has GMP installed... Ideally, they should all have the same specs, because a part of the simulation will represent performance benchmarks. If my question is inappropriate in any way, I kindly ask the administrators to remove it.

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  • How does Deep Zoom (Microsoft Seadragon) work?

    - by Norman Ramsey
    I saw an incredible on Photosynth and Seadragon, some "deep zoom" technology recently acquired by Microsoft. There's also a less responsive version on the web. I'd really like to know how the technology works. Blog entries and web pages welcome, but the ideal answer will include one or more references to published papers in the professional literature.

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  • good way of changing all pixels of one particular color to another particular color in a jpeg/png?

    - by gojira666
    I have an image which looks like this: http://img21.imageshack.us/i/64054053.jpg/ However the yellow line needs to be red and the cyan line needs to be green. I have MS Paint and IrfanView. How can I change the colors of the yellow and cyan line without individually selecting all pixels manually? I.e. what is a good way of changing all pixels of one color to another color?

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  • How to resize images without loss in quality ?

    - by qWolf
    Hi everybody. I have a image JPEG with resolution is 2010 x 1080 (Pixels). And now, I want resize this image to 338 x 450 without losing image quality, how can I do ? (for ex: After I zoom in image, its quality was not good! ) Which software I can use ? Let me know about a solution. Thanks for all responses ;) Update / Clarification: My purpose is have a page contains image. This image have size is 2010x1080 (in original). First, image display on web page with size is 338x450. Then, to see image more clear, I want to zoom in. But when I do this, image quality was lost. Now, i don't know how to execute this problem :(

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  • How to get a good clean newspaper scan?

    - by itsadok
    I tried a few times to scan newspaper articles, but the images I got were always blotchy and with bad colors (sort of like this). Sometimes I see some really good scans, like this. What is the trick to get such good results? Do I need some high-quality scanner, or do I need some good photoshop filters? If there was something I could do using free tools it would be awesome.

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  • How to convert poor quality bitmap image to vector?

    - by Macha
    I'm designing a website for a group which has lost the original digital image for their logo. The only file they have of it is a jpg which was embedded into a word document. The image has everything possible wrong with it: Anti-aliased onto a white background where it should be transparent Image artefacts Resized downwards poorly. Lines that should be straight and solid aren't. I've currently used the wand tool to get rid of the white background, and stuck it on the website, but it's poor quality makes it stick out like a sore thumb. I need a few different sizes of it to use, so how would I go about creating a vector image based on it?

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  • Image Classification - Detecting an image is cartoon-like

    - by kingb
    I have a large amount of jpeg thumbnail images ranging in size from 120x90 to 320x240 and I would like to classify them as either Real Life-like or Cartoon-like. Are there any applications that will have cartoon classification capabilities? This application should work on Linux, and should take an image path on the command-line and return either 0 or 1 (echo $?).

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  • Nginx, HAproxy, Unicorn, Rails and Node settings

    - by Julien Genestoux
    Our application is currently only a "regular" web app, with no fancy things like streaming HTTP or websockets. It's mostly a Rails app, served by a few (20 on 2 machines) Unicorn workers, proxied by a venerable nginx server which deals with load balancing. This has been working quite well for the past year and the app now serves between 400 and 800 requests per second at any point during the day. We're soon releasing 2 new APIs, which are both served by a Node application : a websocket one, as well as a long polling HTTP one. (the fancy thing like the Twitter streaming API where HTTP connections never end). They both use the same port on node and since the node app is stateless, we can certainly deploy a few of them to handle the traffic. The app (node) is now deployed in 5 instances and are now listening on 5 different 'private' ports on the same host. We need to put something in front of them to load balance, but also something that is able to deal with sockets (either websocket or HTTP streaming) which are intended to stay 'up' for days. The question is then : what? I read somewhere that HAProxy does a better job than Nginx at this. What do you recommend?

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  • Automatic Excel Script

    - by Thomas
    I am a 6th year medical student and I'm working on my thesis. I have no experience with programming whatsoever, a friend recommended me to post my question here. I am strugling with the following problem: I have data of 400 patients, stored in 400 different excel files. Each file contains 34 columns in a specific order, let's say A to Z. The order is the same in each of these 400 files. Now I need to a make a new excel document that contains the first column of each patient. So I need all the first columns of my 400 different excel files, lined up next to each other in a new document. Preferebally in the form of a automatic script. After that I want to do the exact same thing but for the second column, then the third and so on. This is probably a problem that has already been solved. Otherwise could someone help me out? You have my thanks!

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  • Content Length and Transfer Encoding Chunked nginx, node-http-proxy

    - by rampr
    I have the following setup - node-http-proxy acts as a reverse proxy forwarding all requests to nginx/socket.io as necessary My problem is this When I send a HTTP DELETE request from the browser, node-http-proxy adds a header "Transfer Encoding Chunked" as the request from the browser had no Content Length. The request from the browser had no Content Length as it had no body. Nginx doesn't like the Transfer Encoding Chunked Header and throws a 411 asking for Content-Length. The problem gets solved when I send dummy data as part of the DELETE request so there is a Content Length and node-http-proxy doesn't add Transfer Encoding Chunked header and nginx is happy. I want to understand if node-http-proxy isn't working as expected, because it adds a Transfer Encoding Chunked header when Content Length is missing because there is no Content Body.

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  • MS Paint for Gnome

    - by flybywire
    I want an MS Paint like program for GNOME. GIMP is too much for me. I find it very frustrating for the simple tasks I do (adding text, arrows and circles to screenshots to highlight different features of a program).

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  • Scanned JPEGs are large and slow to load - can they be optimized losslessly?

    - by Alistair Knock
    I have hundreds of JPEG photographs which were scanned about 5 years ago from negative using a Konica Minolta DiMAGE Scan Dual IV. The dimensions are ~4500x3000, and the filesize is around 12Mb, compared to shots from a DSLR with dimensions of 3000x2300 and filesize of 2-4Mb (actually, these are the output from a RAW convertor). The filesize is obviously quite a big difference, but the issue that's bothering me is that the (perceived) loading time is at least 10 times slower. Is this size/speed discrepancy likely to be because the scanner software saved the JPEGs inefficiently / using an old compression format, or is it simply that the scanned negatives contain much more "detail" (in the form of grain/noise) than the digital images? If the former, is there a way to losslessly optimize them? I've tried re-exporting the scanned files to full size JPEG from my RAW software but the filesize is pretty much the same. Both files will have been saved at 100 quality.

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