[iPhone SDK] Get pixel color

In OS X you can use NScolor Getcolor X Y to get the color of a specific pixel in a given image but this does not seem to be in the framework for the iPhone. Does anyone know how to do this?
thanks in advance
Dave

Hello C.H.Chi
This code might solve your problem.
public partial class Form1 : Form
public Form1()
InitializeComponent();
Bitmap myBitmap;
private void Form1_MouseMove(object sender, MouseEventArgs e)
Color pixelColor = myBitmap.GetPixel(e.X, e.Y);
this.Text = pixelColor.ToString();
private void Form1_Load(object sender, EventArgs e)
myBitmap = new Bitmap(Properties.Resources.Tulips);
place a image in your resource file and access from their.
Kindly mark as answer if found useful.

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Get pixel color on screen

What function do I use to get pixel color of screen
ChangChiTheGraphics
chang Chi

Hello C.H.Chi
This code might solve your problem.
public partial class Form1 : Form
public Form1()
InitializeComponent();
Bitmap myBitmap;
private void Form1_MouseMove(object sender, MouseEventArgs e)
Color pixelColor = myBitmap.GetPixel(e.X, e.Y);
this.Text = pixelColor.ToString();
private void Form1_Load(object sender, EventArgs e)
myBitmap = new Bitmap(Properties.Resources.Tulips);
place a image in your resource file and access from their.
Kindly mark as answer if found useful.

Web applet to get pixel color

I know nothing about java, but I 'll learn if I need. But first, I need to know if a java web applet can do the goal I need:
A java web applet that can pass a specific pixel color on the browser windows to javascript. The coordinates of that pixel will stay outside the own applet borders.
I don't know if this is the right forum, so can you please help me in any way?
Thanks a lot.
Julio Morales.

juliochile wrote:
I know nothing about java, but I 'll learn if I need.
But first, I need to know if a java web applet can do the goal I need:Fair enough
A java web applet that can pass a specific pixel color on the browser windows to javascript. Yes this can be done, but as I recall it was somewhat of a pain. It will also be browser-specific. If you ask me the requirement is probably flawed.
The coordinates of that pixel will stay outside the own applet borders.Huh? So you need to sample a pixel? This post makes little sense. Post the exact use case. Way too vague.

Get pixel color

hello,
if u know how to retrieve the pixel color of any specified coordinate pixel
,say (x,y) please let me know ,i ll be thankfull to u.

hello,
if u know how to retrieve the pixel color of any specified coordinate pixel
,say (x,y) please let me know ,i ll be thankfull to u.

Get pixel color in J2ME

hello,
if u know how to retrieve the pixel color of any specified coordinate pixel
,say (x,y) of a canvas please let me know ,i ll be thankfull to u.

you can try to create a new image and paint on that image.
Image img = new Image( yourcanvaswidth, yourcanvasheight );
yourcanvas.paint( img.getGraphics() );
int [] rgbs = new int[ yourcanvaswidth, * yourcanvasheight ];
img.getRGB( rgbs, 0, yourcanvaswidth, 0, 0, yourcanvaswidth, yourcanvasheight );
the rgbs holds RGB values of you canvas.
hope this will help

[iPhone SDK] Get the *intended" contentOffset in UIScrollViewDelegate calls

Hi all,
a lot of the delegate calls in UIScrollViewDelegate happen before the scrolling is finished, like:
- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView;
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate;
When I'm in these functions, the UIScrollView is still moving to its intended contentOffset. However, the contentOffset property only returns to me the current offset. Is there other property I can look for that tells me the intended offset that the UIScrollView is animating to?
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Message was edited by: rizwansattar04
Message was edited by: rizwansattar04

You would need to ask this over at devforums.apple.com. These forums are for regular users of the iPhone rather than developer questions.

I have an IPhone 4S. My color pictures and all icons have lost their color. How do I get the color back? Did I touch a wrong button?

I have an IPhone 4S. All my color pictures and icons turned to looking like a negative. No color! How do I get the color back on my phone?

Hi ladwwd56,
Welcome to the Support Communities!
Is it possible that you may have an Accessibility feature called "White on Black" turned on?
See page 244 of the iPhone User Guide PDF:
http://manuals.info.apple.com/MANUALS/1000/MA1539/en_US/iPhone_iOS4_User_Guide.p df
White on Black
Use White on Black to invert the colors on the iPhone screen, which may make it easier to read the screen. When White on Black is turned on, the screen looks like a photographic negative.
Invert the screen’s colors: In Settings, choose General > Accessibility and tap the “White on Black” switch.
If that is not the case, try restarting / resetting the iPhone:
iOS: Turning off and on (restarting) and resetting
http://support.apple.com/kb/HT1430
If that does not resolve the issue, refer to page 146 in the iPhone User Guide to Reset All Settings:
iPhone User Guide for iOS 7
manuals.info.apple.com/MANUALS/1000/MA1565/en_US/iphone_user_guide.pdf
Happy New Year!
- Judy

Please Help Get a Color from Pixel !!!!

Is anybody know how to get a Color from pixel.
My program is not Full Screen .
So i think Robot.getPixelColor() don't suitable.
Please Help me!

Robot.getPixelColor() will work fine, but the problem you will have is getting the mouse set to the correct location and getting your application to know where it is: you can do it with win32 calls and JNI. Here are a few that I have found helpful--they are in a VB format:
Public Const CLR_INVALID = &HFFFF 'not a valid pixel
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Public Const MOUSEEVENTF_ABSOLUTE = &H8000 ' absolute move
Public Const MOUSEEVENTF_LEFTDOWN = &H2 ' left button down
Public Const MOUSEEVENTF_LEFTUP = &H4 ' left button up
Public Const MOUSEEVENTF_RIGHTDOWN = &H8 ' right button down
Public Const MOUSEEVENTF_RIGHTUP = &H10 ' right button up
Public Const REQUEST_LEFT_CLICK = &H2D 'request left click "-"
Public Const REQUEST_RIGHT_CLICK = &H2B 'request right click "+"
Type POINTAPI
x As Long
y As Long
End Type
Type POINTSTRUCT
hwnd As Long
hdc As Long
ptAbsolute As POINTAPI
ptOrigin As POINTAPI
ptLocal As POINTAPI
ptColor As Long
sType As String
retMessage As Boolean
End Type
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Lib "user32" (ByRef lpPoint As POINTAPI) _
As Long
Declare Function SetCursorPos _
Lib "user32" (ByVal x As Long, ByVal y As Long) _
As Long
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Lib "user32" (ByVal dwFlags As Long, _
ByVal dx As Long, _
ByVal dy As Long, _
ByVal cButtons As Long, _
ByVal dwExtraInfo As Long)
Declare Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Long)
Declare Function GetMessageExtraInfo Lib "user32" () As Long
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ByVal x As Long, _
ByVal y As Long) As Long
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Get the color of a pixel in an image

how can i do to get the color of a pixel in an image ???
Can anyone help me ?

Hi,
first of all you need to get the library to transfer your image to java.awt.image.BufferedImage object.
I know many such libraries. Its depends of what kind of image you have: jpeg, gif, png or other.
And when you get the BufferedImage of you picture using library, then you can get the color of any pixel in image using int BufferedImage.getRGB(int x, int y) as integer value.
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Get the color of a pixel on the Stage

Is there a way to retrieve the color of a generic pixel on the screen using the mouse pointer inside the Stage of Flash Player? With the getPixel method of the BitmapData class you can get the color of a pixel only if the mouse is over a bitmap image, but what if I need the color a generic pixel on the screen?

this takes a snapshot of the pixel below the mouse:
function eventHandler(event:MouseEvent):void
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http://developer.apple.com
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gvsguy wrote:
Should I spend the $99 to enroll and be able to get an answer?
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charlie

Getting the Color of a Pixel in a Image

Hi. I need to get the Color of the point in an Image (or ImageIcon). I've seen examples but they use BufferedImages.
Thanks, Bob

Here is a simple conversion for you:
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Graphics g = bi.getGraphics():
g.drawImage(myImage, 0, 0, null);If you are using ImageObserver objects, then replace null with the corresponding ImageObserver object in the BufferedImage and drawImage.

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Although I have programmed for Mac in the last years, I have never used Mac-specific technologies as Cocoa (I have programmed more in OpenGL, SDL, and the like).
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contentView = [[[MyView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]] autorelease];
[window addSubview:contentView];
[window makeKeyAndVisible];
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In the class implementation (MyView.m), I have changed the method initWithFrame to:
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if (self = [super initWithFrame:frame]) {
self.backgroundColor = [UIColor darkGrayColor];
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[self addSubview:image];
return self;
loadImageView is a private method I have implemented as:
- (UIImageView *)loadImageView:(NSString *) imageName {
UIImage *img = [UIImage imageNamed:imageName];
UIImageView *theView = [[UIImageView alloc] initWithImage:img];
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Thank you in advance.
Message was edited by: Jedive

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I have a video in excellent quality (1280x720 23,976 fps) I burn the dvd in encore cs6 with hd menu and I get pixelated. I've done transcoding but It downgrade to 480 I need urgent help.

I have a video in excellent quality (1280x720 23,976 fps) I burn the dvd in encore cs6 with hd menu and I get pixelated. I've done transcoding but It downgrade to 480 I need urgent help.

Hi,
first, sorry if my english sucks jajaa i speach spanish, havent practice my english for a while.
first i edited my video in premier cc
sequence 1280X720, 59,94 fps
48000hz - stereo
the i linked it with dynamik link to after, make some color correction, etc etc etc
i renderd in quicktime animation
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[iPhone SDK] Get pixel color

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