Finding the Darkest Pixel in a BufferedImage

What is the best way to find the darkest pixel in a BufferedImage?

What is the best way to find the darkest pixel in a
BufferedImage?Define 'darkest'.
The simplest way to do it would be for each pixel to get the red, green and blue parts and take the max of those values as its brightness.

Similar Messages

  • Quickest way to find the darkest pixel in an image

    I was wondering what the absolute fastest way to grab the darkest pixel(grayscale) in a picture. Or if anyone could give me any ideas on how one would go about making a fast dark pixel finder.

    Is the image Greyscale or RGB?
    Either way - you can access the data by getting the Raster
    Raster r = image.getData()
    Lookup the methods on Raster - you can access the data as one array.
    If the image is RGB - you will have to convert it to a Greyscale value (you let the JVM do it by creating a new Greyscale image and drawing to it, or doing it yourself by access each one and performing the math)...
    Lemme know...

  • Finding the Brightest Pixel in an Image

    How do i select the brightest pixel in an image?

    Set a threshold adjustment layer over your image. Drag the slider to the right until you see the last remaining white specks. These are where your brightest pixels are.

  • How do I find the number of pixels in height of photos?

    I have been asked the following question: If you wish to send book cover images the preferred format is .jpg, 648 pixels high, at a resolution of 100 dpi. Where do I find the answer?

    Open the image in Preview .app and Get Info command i
    To set the size and resolution in Preview:
    Menu > Tools > Adjust Size…
    Peter

  • How do I find the current browser window width in pixels?

    I'm writing a PHP script that will use the current browser
    window width
    and height, but I don't know how to find that. Is there some
    way to
    capture the width and height of the current window in pixels?
    TIA

    Thanks Micha, you certainly may ask why.
    I posted a message some time ago in the appdev forum about
    the Recordset
    Paging server behavior being geared toward use with tables. I
    was
    frustrated because I wanted to do something with repeated
    div's in a
    liquid site. But the Recordset Paging s.b. locks the number
    of records
    per page to a fixed number. I'm trying to figure out how to
    make the
    records per page a variable that's determined by the window
    width. I've
    created a liquid site with a products page that contains both
    text and
    thumbnail product images. The text occupies 2/3 of the width
    of the
    window, and the div container that holds the floated div
    thumbnails I
    want to account for the other third. The thumbnail div's are
    produced by
    a WHILE statement and I want them to be paged based on the
    number of
    div's that will fit within a container that occupies a
    percent of the
    browser window width. Here's what I've got so:
    $window_size_wide = ; // Current browser window width in px
    $window_size_tall = ; // Current browser window height in px
    $thumb_cont_wide = $window_size_wide * .3; // 30% of window
    width incl.
    padding in px
    $thumb_cont_tall = $window_size_tall * .4; // 40% of window
    height incl.
    padding in px
    $thumb_size_wide = 100; // thumbnail div width incl. margins
    in px
    $thumb_size_tall = 100; // thumbnail div height incl. margins
    in px
    $no_thumbs_wide =
    ceil(($thumb_cont_wide/$thumb_size_wide)-1);
    $no_thumbs_tall =
    ceil(($thumb_cont_tall/$thumb_size_tall)-1);
    $records_per_page = ($no_thumbs_wide * $no_thumbs_tall);
    $offset = ($thispage - 1) * $records_per_page;
    $total_pages = ceil($total_records/$records_per_page);
    etc.
    What I don't know is how to find the current window width or
    height. I
    would also like to know if the $thumb_cont_wide and the
    $thumb_cont_tall
    can be determined in some way based on the div size generated
    through my
    CSS. In other words, I don't want to declare the percent of
    height and
    width in this script, I want to declare it only in my CSS and
    have it
    determined by the browser window width and height. The only
    element I
    want to hard code is the size of the thumbnails as they will
    always be
    the same. It seems to me that something like this could be
    done to make
    recordset paging scalable to match a scalable web page.
    So the question is, can I define a PHP variable based on a
    Javascript
    variable? If so, how? If not, how can I accomplish this? Is
    this just
    not possible?
    Thanks for your help.

  • How can I select an area of a picture (larger than one pixel) and find the average RGB values of all the pixels contained inside the area?

    I'm analysing the differences between several different images and I would like to select a large area of each (such as with lasso tool) and find the average RGB value of all of the pixels within the selection area made/

    With the selection you could do a copy paste and use the histogram of the new layer set the histogram source to selected layer.  The eye dropper sample size may also to get the average  of a square area around a point.

  • How do i find the pixels?

    I post a lot of art on websites so i usually export a pic to make it smaller and put it in a folder on my desk top. In that folder it shows how many KB the pic is but not what the pixels are. the only place i can find the pixels is in iPhoto when i look at the original and go to info.
    i ask because i am having trouble posting on one web site and even though my KB is low enough, they ask that the pics are under 800 x 800 pixels and i cant find that info in the reduced sized pictures. where would that info be?

    Select the photo and type Command + i to open the Info tray at the right.  There the pixel dimensions will be displayed.
    You can get the pixel dimensions down to a max of 800 pixels via the File ➙ Export ➙ File Export menu option while selecting a Custom size an entering 800 as the max dimension.
    OT

  • Find the length of a string in pixels

    Hello all,
    Wondering if there's a way in PowerShell to find the length of a given string in pixels?

    That would depend on the font used to draw it, including size, bold / italic, etc.  Assuming you know those things, there's a TextRenderer.MeasureText method in the Windows Forms library:
    $string = 'This is my string. There are many like it, but this one is mine.'
    $font = New-Object System.Drawing.Font('Arial', 12, [System.Drawing.FontStyle]'Bold, Italic')
    $size = [System.Windows.Forms.TextRenderer]::MeasureText($string, $font)
    $size.Width

  • How do I find the pixel size of a photo?

    I have taken a photo or found one online.
    It's now on my ipad.
    How do I tell the pixel resoution of the photo via the ipad?
    I have two of the same photos on my device at the moment and want to delete one.  They may both be 2048/2048, but without emailing them or putting them in Dropbox, and viewing on my laptop, I don't see how to tell.

    Get the Actual Pixels App from the App Store. It's free and will tell you the pixel size of any photo you open.
    https://itunes.apple.com/ca/app/actual-pixels/id608679577?mt=8

  • Trouble finding Color of Pixel

    Hello all,
    I've put together a program which, should return "Success!" if the color if a pixel is equal to the value supplied in an if statement. The values are exactly the same, retrieved from the same pixel, but still when I run the program, the program returns the "else" statement, "Failure!" Does anyone know what the issue is? I'll post all the code as it is a very short program.
    import java.awt.Component;
    import java.awt.Graphics;
    import java.awt.*;
    import java.awt.event.*;
    import java.awt.image.*;
    import java.io.*;
    import javax.imageio.*;
    import javax.swing.*;
    * This class demonstrates how to load an Image from an external file
    public class Main extends Component {
        Robot robot;
        BufferedImage img;
        public void paint(Graphics g) {
            g.drawImage(img, 0, 0, null);
        public Main() {
              try {
              robot = new Robot();
            } catch (AWTException ex) {
           try {
               img = ImageIO.read(new File("/Users/george/Desktop/strawberry.jpg"));
           } catch (IOException e) {
        Color c = new Color(148, 152, 155);
        public void search(){ 
            System.out.println(c);
            if (robot.getPixelColor(20,20) == c){
                System.out.println("Success!");
            }else{
                System.out.println("Failure!  The Color is:");
                System.out.println(robot.getPixelColor(20,20));
        public static void main(String[] args) {
            JFrame f = new JFrame("Find Pixel");
            f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            Main main = new Main();
            f.add(main);
            f.setVisible(true);
            main.search();
    }Thanks! Any and all input is great. Also, if you know any good jokes, please share.
    --James                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

    Your code is very confusing. Are you trying to access a pixel of the image or of the screen?
    Anyway, the line
    if (robot.getPixelColor(20,20) == c){should be
    if (robot.getPixelColor(20,20).equals(c)){

  • How do I find the position of a single character on a page?

    Hi guys,
    I am developing a PDFEditor, but am having trouble implementing the code which finds the location of glyph characters on a page (in device space). I have read the pdf reference on Text, but do not quite understand it.
    I have worked out the individual character spacings, but I cannot accurately find the location of the first character .
    Here is my current attempt:
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    float x = current_matrix_position.x;
    float xa = a * x + c * y + e;
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    current_matrix_position is set as a point (e,f) from the cm operator.)
    This code seems to work with some PDF files:
    But does not work with others:
    (Note there is text in the box above the blue which cannot be disclosed for reasons...)
    Is there something I am missing (like another operator?) or is my formula completely wrong.
    Your help would be greatly appreciated

    Hi Irosenth,
    I have been reading the spec and trying to understand it for several weeks. Unfortunately, I am still confused with how to find the coordinates of the text.
    >> You need to parse the content stream(s) that are associated with the page and
    I have done this. My program finds both the cm operator, the tm operator and the font widths etc. Unfortunately, now that I have all of this information, I am unsure what to do with it.
    How do I properly add these two matricies together? I have looked in the spec which describes it as:
    x' = a * x + c * y + e
    y' = b * x + d * y + f
    I tried this and the results worked on some pages, but not on others (several thousand x coordinates out...). I am finding the ISO 32000-1:2008 very confusing in this section.
    >> manage what you find there
    This is the part I am having major trouble with. Using the coordinate transformation matricies, how can I determine the starting coordinate for the first glyph in a text (BT, ET) on a non-scaled page (so 1 unit = 1 pixel) using the matricies?
    Thanks

  • I cann't find the"define" option in adobe reader when I read a PDF file in iPad 3.

    I cann't find the "define" option in adobe reader when I read a PDF file in my iPad 3. I have already latest reader version and iOS 5.1.1 installed.

    I believe that I figured it out.
    holding finger over a word, will bring the copy/define menu
    holding finger where there is NO text, empty space or image, will bring up the annotation menu.
    but note that if you have a scanned document, where the words are actually an image, you will get the annotation menu, since there really is no text, just a bunch of pixels that look like text...
    you can turn scanned text into "real" text by using OCR functionality of the desktop version of Acrobat Pro (not Reader), it would then create a layer of invisible text under the image of the text.

  • Why can I not find the Rubber Stamp icon in Fireworks 8

    Using Fireworks 8:
    ok - fairly new to all this - but I am trying to clone pixels and am looking for the rubber stamp icon.  My "Bitmap" menu has marquee, lasso, magic wand, brush, pencil, eraser, burn & red eye icons on it, and under "Assets" (under Image Editing tab) in the other toolbar I have red eye, crop, scale, blur, sharpen, dodge and burn icons. No rubber stamp icon to be found.  I am trying to edit a .jpg file (photo).  I have read that it only works on bitmap files so I have saved it as a .bmp but still no luck finding the rubber stamp icon.  Where am I going wrong please?!
    Many thanks

    Panic not... it has only taken me all afternoon but there must have been a error as I have just reloaded the app and holding the mouse button down now produces a menu of options on the bitmap menu, so the user can toggles from one to the other.

  • Finding the width of a JPEG loaded into a movie clip

    I will be loading a page of bio information. Next to the
    person's photo (photos will vary in width) I want to put a column
    of buttons about 20 pixels to the right of the photo. So after I
    load the photo into an empty movie clip, I'm trying to get the
    width of the photo in order to figure out the x position of the
    buttons next to it. Here is what I have:
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    trace("image_mc._x = " + image_mc._x);
    // I get "Image_mc._x = 393" as expected //
    trace("myImage._width = " + myImage._width);
    // I get "image_mc._width = undefined" //
    trace("image_mc._width = " + image_mc._width);
    // I get "image_mc._width = 0" //
    How do I find the width of the loaded JPEG?

    you are probably trying to get the width before the image has
    loaded completely.. use the MovieClipLoader class to load the image
    into the empty movie clip, then use the onLoadInit event to get the
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    var mcLoader:MovieClipLoader = new MovieClipLoader();
    var myListener:Object = new Object();
    myListener.onLoadInit = function(target:MovieClip):Void{
    trace(image_mc._width);
    mcLoader.addListener(myListener);
    mcLoader.loadClip(myImage, image_mc);

  • Locating the position of the brightest pixel in a region of interest

    I need to locate the x and y coordinates for the brightest pixel in a region of interest rectangle (user defined).  I see that there's a Light Meter that uses a rectangle, but I can't find a way to have it tell me the location of the brightest pixel (only the intensity)
    Any input would be appreciated.  I'm using v7.1. 
    Thanks

    I don't have time to try to come up with a solution that uses divide and find.  Divide in for sections, find the brightest one, then divide that one into four sections.  Keep going until you get your answer. 
    If you use IMAQ Light Meter (Line) you can find the pixel using the line profile.
    Matthew Fitzsimons
    Certified LabVIEW Architect
    LabVIEW 6.1 ... 2013, LVOOP, GOOP, TestStand, DAQ, and Vison

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