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PHP - No Matter What I Do Image Stays Black (gd) Help!

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No Matter What I Do Image Stays Black (gd) Help!	View Content

function buildAvatar(array $imgArray = array())
   {
      $img1 = imagecreatefrompng($phpbb_root_path.'images/spacer.png');
      foreach($imgArray as $img)
      {
         $img2 = imagecreatefrompng($phpbb_root_path.'avatars/equip_img/'.$img);
         $this->imagecopymerge_alpha($img1, $img2, 0, 0, 0, 0, 210, 300, 100);
      }
      imagealphablending($img1, false);
      imagesavealpha($img1, true);
      return $img1;
   }

The background of my PNG was transparent, I don't know what I did, but it's now black! I'm thinking it's the image! Not the code, this same code worked before, and I've tried tons of different ways of fixing it. How should I save the image to work correctly?

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Strange Black Line In An Image

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This is kind of weird, I've tried to figure out what is wrong for a while now, but I really can't seem to figure it out.
My script does seem to work with the values I think it works with, but that might be where the error is.
I've messed around a lot with it, but I still can't seem to understand what the problem is...
I do realize I can just use the filledrectangle function instead of creating a new image for each background color, but the problem itself really annoys me.
The black line doesn't appear anywhere but between the two first background colors and only if both background colors are visible... o.O
Might be I need to use some other imagecopy function, but this is all so weird!
<?php

// image size
$x=500;
$y=100;

// creating transparent image
$im=imagecreatetruecolor($x,$y);
$tc=imagecolorallocatealpha($im,255,255,255,0);
imagefill($im,0,0,$tc);

// background colors
// the escaped lines is for making a background image transparent, to see where the black line appears
$bgc[]=array(255,0,0,0);
//$bgc[0]=array(255,0,0,127);
$bgc[]=array(0,255,0,0);
//$bgc[1]=array(0,255,0,127);
$bgc[]=array(0,0,255,0);
$bgc[]=array(0,255,255,0);

// adding backgrounds
// background count:
$bgcq=count($bgc);
// backgroundsize x,y:
$bgs=array(ceil($x),($y+1)/$bgcq);
// location:
$bgsl=0;
// last height:
$bgsh=0;
for($i=0;$i<$bgcq;$i++){
// start location for this background:
$bgsl+=$bgsh;
// calculating a round number for the background height
if($bgsl+$bgs[1]<round($bgs[1]+($bgs[1]*$i))){
$bgsh=ceil($bgs[1]);
}else{
$bgsh=floor($bgs[1]);
}
// creating background image:
$bg=imagecreatetruecolor($bgs[0],$bgsh);
// filling background image with set color
$abgc=imagecolorallocatealpha($bg,$bgc[$i][0],$bgc[$i][1],$bgc[$i][2],$bgc[$i][3]);
imagefill($bg,0,0,$abgc);
// pasting background on image (imagecopy gives the same result)
imagecopyresampled($im,$bg,0,$bgsl,0,0,$bgs[0],$bgsh,$bgs[0],$bgsh);
// to see the values (test purpose), must escape header and imagepng functions
//echo $bgsl.'-'.($bgsl+$bgsh).'<br />'.$bgsh.'<br />';
}

// output, remember to escape it to echo variables
header('Content-type: image/png');
imagepng($im,NULL,0);

?>
I've tried to make the script as understandable and easy as possible...

anyone got any ideas about what is wrong here, and how to maybe fix it?

Can't Copy Transparent Image. (black Background)

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I am trying to copy an image into another image.

Code: [Select]
$im = imagecreatefrompng("/oldimg.png"); //this is a semi-transparent image where I want the new image to be copied

imagealphablending($im, 1); //this seems to remove the black background

header('Content-type: image/png'); //outputs old image with a transparent background (YAY!)
imagepng($im);

imagecopy($im, $newimage, 32, 0, 0, 0, 32, 32); //I want to replace a part of the old image with a new semi-transparent image

header('Content-type: image/png'); //outputs image with a black background (noooooooooo!)
imagepng($im);

Can anyone help me?

Resizing Jpeg Results In Black Image

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this is the code
<?php
$image = imagecreatefromjpeg("9t4i_200xX.jpg");
$new_image = imagecreatetruecolor(120,90);
imagecopyresampled($new_image, $image, 0, 0, 0, 0, 120, 90, imagesx($image), imagesy($image));
$image = $new_image;
imagejpeg($image,"images/test.jpg");
?>
result is black jpeg image of size 120,90
I dont understand where could be the problem
SimpleImage.php script doesnt work either

Converting Grayscale Image To Pure Black And White

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I'm trying to convert a grayscale image to pure black and white in php using the GD library.

The purpose would be to detect the cervical cells within the image.

I'll leave the php code and a matlab one (i wrote this code in matlab and i'm trying to obtain the same result in php). Basically, im having troubles accessing each individual pixel's color and modifying it.

MATLAB:

clear all, clc, close all;


I = imread('celule.jpg');
imshow(I)
title('original');

a=rgb2gray(I);

figure;
imshow(a)
title('grayscale');

s=size(a);


for i=1:s(1)
    for j=1:s(2)

        if a(i,j)>190
            a(i,j)=0;
        else a(i,j)=255;
            end
        end
end

 figure;
 imshow(a)
 title('pure black and white');

PHP:

<?php
 $im = imagecreatefromjpeg("celule.jpg");

function imagetograyscale($im)
{
    if (imageistruecolor($im)) {
        imagetruecolortopalette($im, false, 256);
    }

    for ($c = 0; $c < imagecolorstotal($im); $c++) {
        $col = imagecolorsforindex($im, $c);
        $gray = round(0.299 * $col['red'] + 0.587 * $col['green'] + 0.114 * $col['blue']);
        imagecolorset($im, $c, $gray, $gray, $gray);
    }
}

imagetograyscale($im);

//imagefilter($im, IMG_FILTER_CONTRAST, -255);  //i'm not looking for this effect 

header('Content-type: image/jpeg');
imagejpeg($im);

$C = imagesx($im); //width
 $L = imagesy($im); //height

 echo "Dimensiuni imagine: latime $C, inaltime $L <br>";

 //scanning through the image
 for($x = 0; $x < $L; $x++) {  //each line
    for($y = 0; $y < $C; $y++) {  //each collumn
        // pixel color at (x, y)
        $color = imagecolorat($im, $y, $x);
        $color = imagecolorsforindex($im, $color); //getting rgb values
        $RED[$x][$y] = $color["red"];  //each rgb component
        $GREEN[$x][$y] = $color["green"];
        $BLUE[$x][$y] = $color["blue"];

    }
 } 

?>

After image is drop into container , I want to move copy of the original image to be move when original image dragend within container. I tried but it display copy image each time when original image dragend. can anyone help me?

 <!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Prototype</title>
    <script type="text/javascript" src="http://code.jquery.com/jquery.min.js"></script>
    <script src="http://d3lp1msu2r81bx.cloudfront.net/kjs/js/lib/kinetic-v4.7.2.min.js"></script>
    <script src="http://code.jquery.com/ui/1.9.2/jquery-ui.min.js"></script>
<style>
    body{padding:20px;}
    #container{
      border:solid 1px #ccc;
      margin-top: 10px;
      width:350px;
      height:350px;
    }
    #toolbar{
      width:350px;
      height:35px;
      border:solid 1px blue;
    }
</style>        
<script>
$(function(){
 
    var $house=$("#house");
    $house.hide();
 
    var $stageContainer=$("#container");
    var stageOffset=$stageContainer.offset();
    var offsetX=stageOffset.left;
    var offsetY=stageOffset.top;
 
    var stage = new Kinetic.Stage({
        container: 'container',
        width: 350,
        height: 350
    });
    var layer = new Kinetic.Layer();
    stage.add(layer);
 
    var image1=new Image();
    image1.onload=function(){
        $house.show();
    }
    image1.src="http://vignette1.wikia.nocookie.net/angrybirds/images/b/b6/Small.png/revision/latest?cb=20120501022157";
 
    $house.draggable({
        helper:'clone',
    });
 
    $house.data("url","house.png"); // key-value pair
    $house.data("width","32"); // key-value pair
    $house.data("height","33"); // key-value pair
    $house.data("image",image1); // key-value pair

    $stageContainer.droppable({
        drop:dragDrop,
    });
    function dragDrop(e,ui){
 
        var x=parseInt(ui.offset.left-offsetX);
        var y=parseInt(ui.offset.top-offsetY);
 
        var element=ui.draggable;
        var data=element.data("url");
        var theImage=element.data("image");
 
        var image = new Kinetic.Image({
            name:data,
            x:x,
            y:y,
            image:theImage,
            draggable: true,
        
        dragBoundFunc: function(pos) {
            return {
              x: pos.x,
              y: this.getAbsolutePosition().y
            }
        }        
        
	   });
			image.on("dragend", function(e) {
			   var points = image.getPosition();
			   var image1 = new Kinetic.Image({
					name: data,
					id: "imageantry",
					x: points.x+65,
					y: points.y,
					image: theImage,
					draggable: false
				});
					layer.add(image1);
					layer.draw();
			});
		image.on('dblclick', function() {
			image.remove();
			layer.draw();
		});
        layer.add(image);
        layer.draw();
    }
 
}); // end $(function(){});

</script>       
</head>
<body>
    <div id="toolbar">
        <img id="house" width=32 height=32 src="http://vignette1.wikia.nocookie.net/angrybirds/images/b/b6/Small.png/revision/latest?cb=20120501022157"><br>
    </div>
    <div id="container"></div>
</body>
</html>

Edited by Biruntha, 08 January 2015 - 10:14 AM.

Original Image Size, Thumbnail Image, Anchor Tag, Referencing?

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The script for creating a new file name for the image:

        $validextensions = array("jpeg", "jpg", "png");  //Extensions which are allowed
        $ext = explode('.', basename($_FILES['file']['name'][$i]));//explode file name from dot(.) 
        $file_extension = end($ext); //store extensions in the variable

        $new_image_name = md5(uniqid()) . "." . $ext[count($ext) - 1];
		$target_path = $target_path . $new_image_name;//set the target path with a new name of image

The script creates a new file like:

f6c9b8d9db05366c3504210cded9ddb2.jpg

and moves the file to the "uploads" folder. And then the script also creates a thumbnail with the same file name and moves the file to the "thumbs" folder. The issue I am having is that the same ID code could happen again for a different image in the database, thus I would be calling a different original sized image than the thumbnail image. My question is: How to avoid this issue of the same ID code has happened again for a different file. What is the proper way to reference the anchor tag of the thumbnail image to its actual original sized image? With the script I have the thumbnail image would be coming from the "thumbs" folder and the anchor tag would get referenced to the "uploads" folder to get the original sized image.
Edited by glassfish, 12 October 2014 - 05:51 AM.