Cut any shape from image ( Imagik/Gd) - php

Is there any way to cut any shape from square image in PHP ?
Example, I have image with heart shape:
Another image in same size like heart.
Final image:
So my question is there way in PHP to make such effect from two images, or one image ?


You basically just want to copy the opacity of the heart template into the car picture. So, at the command-line, you would do:
convert motor.jpg heart.png -compose copyopacity -composite result.png
And in PHP:
#!/usr/local/bin/php -f
<?php
$template=new Imagick('heart.png');
$image =new Imagick('motor.jpg');
# Copy alpha from template over car image
$image->compositeImage($template,imagick::COMPOSITE_COPYOPACITY,0,0);
$image->writeImage('result.png');
?>

Related

Error Level Analysis with Imagick PHP - result without color

yesterday I posted about a problem with recreating an Error Level Analysis in PHP with Imagmagick. In this question I found a solution with the command-line interaction and tried to translate it into Imagick and PHP.
The following code was proposed:
convert barn.jpg \( +clone -quality 95 \) -compose difference -composite -auto-level -gamma 1.5 barn_ela.png
In this example, the result should highlight the manipulated parts of the image. So I implemented the following code:
$ELAImageMagick = new Imagick($targetDir . $OriginalImage);
$OriginalImageMagick = new Imagick($targetDir . $OriginalImage);
$ELAImageMagick->setImageCompression(Imagick::COMPRESSION_JPEG);
$ELAImageMagick->setImageCompressionQuality($this->getRequest()->postVar('elaQuality'));
$ELAImageMagick->compositeImage($OriginalImageMagick, Imagick::COMPOSITE_DIFFERENCE, 1,1);
$ELAImageMagick->autoLevelImage();
//Set gamma with a slider in the frontend
$ELAImageMagick->gammaImage($this->getRequest()->postVar('elaSize'));
//save ELA-image into Folder
$ELAImageMagick->writeImage($targetDir . $ELAImage);
Unfortunatly the result does not come close to the desired optic of the result:
The original image (yellow bird has been added in photoshop)
The ELA-Result
Does anyone have an idea, what step I didn't catch quite right and how to solve it? I looked into the documentation and didn't really find any alternatives to this.
Thanks in advance!

You need to first prove that your code works in Imagemagick. But -quality only works for writing a JPG output. So you need to actually save the result of the -quality operation as a JPG and then use it in a second command. Here I just pipe from one convert to another. The first convert actually creates the compressed JPG but just passes it to the second command without writing to disk.
Input:
convert birds.jpg -quality 95 JPG:- | convert birds.jpg - -compose difference -composite -auto-level -gamma 1.5 birds_ela.png
The result I get is:
This is a JPG version of the PNG output since the PNG was too large to post.
However the results from the command line do not match the resulting image you show. So the command is not going to work in Imagick either.
ADDITION:
From what I can see there is no tampering other than possibly the orange bird in the middle. Most of the image is flat or has random noise. The small bird in the middle has a bit brighter texture and so may be an insert.
ADDITION 2
For enhancing edge artifacts, add -geometry +1+1 to my command above just before -compose difference.
convert birds.jpg -quality 95 JPG:- | convert birds.jpg - -geometry +1+1 -compose difference -composite -auto-level -gamma 2 -define jpeg:extent=2000kb birds_ela2.png
Again posting a JPG version for file size issues.
This looks similar to your posted result.

Generate centered thumbnail from first frame of GIF with ImageMagick

I have the following method to generate a thumbnail. It takes any dimensions and converts it to a 600 x 450 image, centered.
private function generateThumbnail ($ext, $name) {
if ($ext === ".png"){
exec('convert -define png:size=1200x900 '.$this->file.' -thumbnail 600x450^ -gravity center -extent 600x450 '.$name);
exec("optipng -o2 -q " . $name);
} else {
exec('convert -define jpeg:size=1200x900 '.$this->file.' -thumbnail 600x450^ -gravity center -extent 600x450 '.$name);
$img = new Imagick($name);
$img->setImageCompression(Imagick::COMPRESSION_JPEG);
$img->setImageCompressionQuality(97);
$img->stripImage();
$img->writeImage($name);
$img->destroy();
}
}
The problem arises when generating a thumbnail from a GIF. It doesn't generate an image from the first frame. One GIF just had a blank image (transparent), another had strange colors/quality.
How do I generate a thumbnail the first frame of a GIF, centered?

You could probably do them with the API but I do not use it as it is limited. But it looks like you still need to use the command line for the optipng program anyway so I would have carried on with the command line.
Anyway back to your problem; how do you know the first frames of the gif are not a transparent image or a strange image?
As #Mark Setchell said you should be able to specify a specific frame with input.gif[0] and I would try that with a different number and see what you get.
I am not an animation use but you should be able to see the gif frames with -coalesce. Anthony has some examples on his site: http://www.imagemagick.org/Usage/anim_basics/#coalesce
This should give you an idea of the frames in the gif:
montage script_k.gif -coalesce \
-tile x1 -frame 4 -geometry '+2+2' \
-background none -bordercolor none coalesce_k_montage.gif
You can see how you gif file is made and perhaps go for the second or third frame rather than the first.

Cropping an image using Jcrop and Imagemagick

I'm confused on how the -crop function works in Imagemagick.
I have the following values from Jcrop.
(x1,y1), (x2,y2), width and height.
And following command:
exec("convert $target_path -crop ".$w."x".$h."+$x+$y +repage $target_path");
Original image:
Result after crop:
My question is, How do I used the coordinates and dimensions from Jcrop, and use them with Imagemagick?

I have no idea what values you are passing into convert, but your command needs to look something like this to extract the light region -if that is your aim:
convert x.png -crop 240x240+120+100 out.png
The first 240 is the width of the cropped area, and the second 240 is its height. The 120 is the x-offset across from the top-left corner and the +100 is the y-offset down from the top.
Or, in general terms, you specify the crop like this
convert input.png -crop ${x}x${y}+${a}+${b} output.png

I feel like an idiot.
I had style='max-width:500px;' on my image during the crop. Removed the style and now it's working.

PHP Imagick (ImageMagick) RGB > CMYK with Flat Black

I'm using PHP Imagick to convert PNG images generated in PhantomJS to TIF CMYK,
for print purposes I need a flat Black (cmyk - 0,0,0,100) - the conversion generates blacks like (cmyk - 58,49,44,89).
I'm converting the images using color profile (section of my code below) -> the code is based on Convert image from RGB to CMYK with Imagick
is it possible to force a flat black with Imagick ? do you know any other tools that might help ?
thanks,
if ($has_icc_profile === false) {
$icc_rgb = file_get_contents( '/srgb_profiles' . '/sRGB.icc');
$image->profileImage('icc', $icc_rgb);
unset($icc_rgb);
}
// then we add an CMYK profile
$icc_cmyk = file_get_contents( '/cmyk_profiles'.'/JapanColor2002Newspaper.icc');
$image->profileImage('icc', $icc_cmyk);
UPDATE :
after checking online I think I'm looking for a UCR en.wikipedia.org/wiki/Under_color_removal method for ImageMagick - I found that convert old versions supported under color removal
-undercolor <undercolor factor>x<black-generation factor>
control undercolor removal and black generation on CMYK images.
This option enables you to perform undercolor removal and black generation on CMYK images-- images to be printed on a four-color printing system. You can con- trol how much cyan, magenta, and yellow to remove from your image and how much black to add to it. The standard undercolor removal is 1.0x1.0. You'll frequently get better results, though, if the percentage of black you add to your image is slightly higher than the percentage of C, M, and Y you remove from it. For example you might try 0.5x0.7. (http://www.chemie.fu-berlin.de/chemnet/use/suppl/imagemagick/www/convert.html) -
apparently the option is not supported anymore, I'm interested if anyone knows if UCR is the solution I'm looking for and if anyone knows if it's supported or if I'm supposed to use a different method to get the same result.

If you use ImageMagick's convert at the command line like this to generate a grayscale ramp, 1 pixel wide and 256 pixels tall, going from white to black and convert it to CMYK colorspace and then show it as text, you get what you want:
convert -size 1x256 'gradient:rgb(255,255,255)-rgb(0,0,0)' -colorspace cmyk txt:
# ImageMagick pixel enumeration: 1,256,65535,cmyk
0,0: (0%,0%,0%,0%) #0000000000000000 cmyk(0,0,0,0)
0,1: (0%,0%,0%,0.392157%) #0000000000000101 cmyk(0,0,0,1)
0,2: (0%,0%,0%,0.784314%) #0000000000000202 cmyk(0,0,0,2)
0,3: (0%,0%,0%,1.17647%) #0000000000000303 cmyk(0,0,0,3)
0,4: (0%,0%,0%,1.56863%) #0000000000000404 cmyk(0,0,0,4)
0,5: (0%,0%,0%,1.96078%) #0000000000000505 cmyk(0,0,0,5)
0,6: (0%,0%,0%,2.35294%) #0000000000000606 cmyk(0,0,0,6)
0,7: (0%,0%,0%,2.7451%) #0000000000000707 cmyk(0,0,0,7)
0,8: (0%,0%,0%,3.13725%) #0000000000000808 cmyk(0,0,0,8)
0,9: (0%,0%,0%,3.52941%) #0000000000000909 cmyk(0,0,0,9)
0,10: (0%,0%,0%,3.92157%) #0000000000000A0A cmyk(0,0,0,10)
...
...
0,249: (0%,0%,0%,97.6471%) #000000000000F9F9 cmyk(0,0,0,249)
0,250: (0%,0%,0%,98.0392%) #000000000000FAFA cmyk(0,0,0,250)
0,251: (0%,0%,0%,98.4314%) #000000000000FBFB cmyk(0,0,0,251)
0,252: (0%,0%,0%,98.8235%) #000000000000FCFC cmyk(0,0,0,252)
0,253: (0%,0%,0%,99.2157%) #000000000000FDFD cmyk(0,0,0,253)
0,254: (0%,0%,0%,99.6078%) #000000000000FEFE cmyk(0,0,0,254)
0,255: (0%,0%,0%,100%) #000000000000FFFF cmyk(0,0,0,255)
You must be doing something different - maybe this will help you work it out. I am guessing it is your ICC profiles but you can experiment with the above command.
If you just want to experiment with spot values, you can just have IM translate a single pixel like this:
convert -size 1x1 xc:#000000 -colorspace cmyk txt:
# ImageMagick pixel enumeration: 1,1,65535,cmyk
0,0: (0%,0%,0%,100%) #000000000000FFFF cmyk(0,0,0,255)
or maybe more simply like this:
convert -size 1x1 xc:#000000 -depth 8 -colorspace cmyk txt:
# ImageMagick pixel enumeration: 1,1,255,cmyk
0,0: (0,0,0,255) #000000FF cmyk(0,0,0,255)
Note the following though:
You must put profiles between input image and output image names on the command line.
If your image has no embedded profile, the first profile you give is applied to the input image and the second to the output image. If your input image does have a profile, the first profile you give is applied to the output image.

PHP ImageMagick: How To Merge Animated GIF Into Static Canvas

i'm trying to add some animated gif into static image (canvas), here's my start code
exec("convert canvas.gif animated.gif result.gif");
with that code, animated gif will placed on top left canvas.
My question is how to make adjustment position of animated in canvas area and maybe resize this animated gif before merge?
Please note, with code above, will add 1 frame extra to result, i dont know how to fix this :(
Update:
My latest code on PHP
$cmd = "convert $animation -gravity center -geometry +0+5 null: $watermark -layers composite -layers optimize GIF:-";
header("Content-type: image/gif");
passthru($cmd, $retval);
Now frames are same with animated source, but sometimes GIF like loosing background frame :(
this is image example for finish result
http://i.stack.imgur.com/xxGzV.gif
How to make background frame looping forever?
Thanks and regards
nb: sorry for bad english ..lol

try:
convert background.jpg animation.gif -loop 0 new_animation.gif

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