Jcrop: How to overcome low resolution images after cropping? - image

Question

I am currently working on a solution, where I crop an image to a rectangle using jcrop so I can use it as a texture for a 3D cube (in three.js)
AND I can save the cropped area as an image on the server.
The Problem here is, that the cropped image looks not good, it has low quality.
At first I thought it has something to do with the DPI, because it saves in 96 DPI, but some images that I upload do also have 96 dpi and have good quality.
I think it has something to do with jcrop. Do someone know or had any experience with jcrop regarding this issue? Or should I use a different plugin?
Original Image
Cropped Image

Answer 1

why don't you use php resize image system.
i am using it on my website.
Check demo resize wallpaper (check screen shoot) : Happy diwali wallpaper
and original wallpaper (download button as well as below resize option at the page) diwali wallpaper
you ca use
function resize($newWidth, $targetFile, $originalFile) {
$info = getimagesize($originalFile);
$mime = $info['mime'];
switch ($mime) {
case 'image/jpeg':
$image_create_func = 'imagecreatefromjpeg';
$image_save_func = 'imagejpeg';
$new_image_ext = 'jpg';
break;
case 'image/png':
$image_create_func = 'imagecreatefrompng';
$image_save_func = 'imagepng';
$new_image_ext = 'png';
break;
case 'image/gif':
$image_create_func = 'imagecreatefromgif';
$image_save_func = 'imagegif';
$new_image_ext = 'gif';
break;
default:
throw new Exception('Unknown image type.');
}
$img = $image_create_func($originalFile);
list($width, $height) = getimagesize($originalFile);
$newHeight = ($height / $width) * $newWidth;
$tmp = imagecreatetruecolor($newWidth, $newHeight);
imagecopyresampled($tmp, $img, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);
if (file_exists($targetFile)) {
unlink($targetFile);
}
$image_save_func($tmp, "$targetFile.$new_image_ext");
}
Source: Resize images with PHP, support PNG, JPG