Image jpg to png php

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PHP library to convert between gif, jpeg, png and webp image files

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free-open-source/php-image-converter

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readme.md

PHP library to convert between gif, jpeg, png and webp image files.

echo \ImageConverter\convert(string $from , string $to , int $quality);

 include __DIR__ . '/src/php-image-converter.php'; $from = __DIR__ . '/my-image.png'; $to = __DIR__ . '/my-image.webp'; echo \ImageConverter\convert($from, $to);

The third argument is an optional $quality value. It will differ depending on your image format.

Format	Default	Min	Max	Description
gif	null	null	null	Quality value not supported
jpeg	-1	0	100	Higher means better quality
png	-1	0	9	Lower means better quality
webp	80	0	100	Higher means better quality

If you try to convert to a path that has not been created, it will try to create it automatically.

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PHP library to convert between gif, jpeg, png and webp image files

License

free-open-source/php-image-converter

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readme.md

PHP library to convert between gif, jpeg, png and webp image files.

echo \ImageConverter\convert(string $from , string $to , int $quality);

 include __DIR__ . '/src/php-image-converter.php'; $from = __DIR__ . '/my-image.png'; $to = __DIR__ . '/my-image.webp'; echo \ImageConverter\convert($from, $to);

The third argument is an optional $quality value. It will differ depending on your image format.

Format	Default	Min	Max	Description
gif	null	null	null	Quality value not supported
jpeg	-1	0	100	Higher means better quality
png	-1	0	9	Lower means better quality
webp	80	0	100	Higher means better quality

If you try to convert to a path that has not been created, it will try to create it automatically.

Источник

Convert JPG/GIF image to PNG in PHP?

Question: I have a PHP form that allows image uploads and checks to make sure an image is valid. Solution 3: This code is use for save image in png format in a folder in asp.net #region Save image in Png format string imgName1 =

Convert JPG/GIF image to PNG in PHP?

I have a PHP form that allows image uploads and checks exif_imagetype(); to make sure an image is valid.

However, I want all formats, PNG, JPG, JPEG, and GIF, to end up being PNG once submitted.

How can I go about doing this?

You just need imagepng() then. In fact it almost becomes a one-liner:

 imagepng(imagecreatefromstring(file_get_contents($filename)), "output.png"); 

You would use $_FILES[«id»][«tmp_name»] for the filename, and a different output filename obviously. But the image format probing itself would become redundant.

Based on what kind of image it is you could select the correct function to open the file:

$extension = strtolower(pathinfo($filename, PATHINFO_EXTENSION)); switch ($extension)

Then you just save the file using:

imagepng($image, $new_filename, $quality); 

It might be worth noting that this will only parse the actual extension and not really validate so the file is in the specific format. For instance, you could take a jpg image and just change the extension to png. So a better approach is to use the exif_imagetype() which will return the type of image not depending on the actual extension.

 
  
 elseif(exif_imagetype($_FILES['image']['tmp_name']) == IMAGETYPE_JPEG) < $newpng = 'image.png'; $png = imagepng(imagecreatefromjpeg($_FILES['image']['tmp_name']), $newpng); >else //already png < $newpng = 'image.png'; >> ?> 

Very simple using the gd functions:

switch (exif_imagetype($image)) < case IMAGETYPE_GIF : $img = imagecreatefromgif($image); break; case IMAGETYPE_JPEG : $img = imagecreatefromjpeg($image); break; default : throw new InvalidArgumentException('Invalid image type'); >imagepng($img, $filename); 

For conciseness this obviously doesn’t handle the case if the image is already a PNG.

Convert JPG/GIF image to PNG in PHP?, In this example, you can’t use (you can get this if you use two lines of code). The tempfile from the upload will be deleted automatically when the script ends. – hakre. Dec 18, 2011 at 6:02. Does Image quality get affected if I convert jpg to png? I know that gif and png supports same color types, but jpg supports … Usage exampleimagepng(imagecreatefromstring(file_get_contents($filename)), «output.png»);Feedback

Convert Image to G-CODE for CNC machine

Convert Image to G- CODE for CNC machineA quick and easy to take a image and convert it to g- code withInkscape and jscut.orgDownload Inkscape : …

Converting an image to png on upload

When a user uploads a jpg/gif/bmp image, I want this image to be converted to a png image and then converted to a base64 string.

I’ve been trying to get this to work but I’ve hit a brick wall really, can anyone help me out please?

My current code without the image conversion is below:

public ActionResult UploadToBase64String(HttpPostedFileBase file)

You’re not converting it at all there.. you can use something like this:

using System.Drawing; Bitmap b = (Bitmap)Bitmap.FromStream(file.InputStream); using (MemoryStream ms = new MemoryStream()) < b.Save(ms, ImageFormat.Png); // use the memory stream to base64 encode.. >

You can convert to PNG in temp folder and then upload it.

private string GetConvertedPNGFile(string imagename)

Now upload the changed file and then delete the converted file.

This code is use for save image in png format in a folder in asp.net

#region Save image in png format
string imgName1 = «Photo_» + lblCode.InnerText;

 Guid uid1 = Guid.NewGuid(); string PhotoPath1 = Server.MapPath("~/Employee/EmpPngPhoto/") + lblCode.InnerText; string SavePath1 = PhotoPath1 + "\\" + imgName + ".png"; if (!(Directory.Exists(PhotoPath1))) < Directory.CreateDirectory(PhotoPath1); >System.Drawing.Bitmap bmpImage1 = new System.Drawing.Bitmap(fuPhotoUpload.PostedFile.InputStream); System.Drawing.Image objImage1 = ScaleImage(bmpImage1, 160); objImage.Save(SavePath1, ImageFormat.Png); #endregion 

C# — converting an image to png on upload, Add a comment. 1. You can convert to PNG in temp folder and then upload it. private string GetConvertedPNGFile (string imagename) < var bitmap = Bitmap.FromFile (imagename); b.Save (Path.GetFileName (imagename) + ".png", ImageFormat.Png); return Path.GetFileName (imagename) + ".png"; >Now …

Convert BLOB image to PNG, JPG with Python

I have several blob images in Oracle, so I read them with python. I can correctly read and convert images from a certain table1 with my code, but when changing to table2 I cannot execute the same code because I get the following error.

cannot identify image file

import pandas as pd import cx_Oracle from PIL import Image #[connection to database with connecting string `conn`] #[query to acces 1 single image] result = pd.read_sql(query, conn) #connection to db img = result["IMAGE"][0].read() # reading the first BLOB result pre_img = io.BytesIO(img) Image.open(pre_img) 

This code works well, so the only problem is when I try to read images from table1 . Also at SQL developer I can previsualize the photos from table1, but not with table2. The type of data is BLOB as describe(table) says in Oracle.

value of img can be found here

import base64 with open("imageToSave.png", "wb") as fh: fh.write(base64.decodebytes(img)) 

Use the module to show or save the file from the blob

from PIL import Image file = request.files['file'] img = Image.open(file.stream) img.show() img.save("imagefile.jpg") 

Convert BLOB image to PNG, JPG with Python, It depends on what you mean by «worked fine». Yes, it will save a file, but can you open the file and get back an image? If it’s a .png it will fail if you save it as .jpg, and if it’s a .jpg it will fail if you save it as .png. –

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Convert JPG/GIF image to PNG in PHP?

If you’re working on a PHP project that requires converting JPG or GIF images to PNG, then you’re in the right place. In this guide, we will walk you through the steps to do so with code examples.

Requirements

Before we begin, you’ll need to make sure that you have the following requirements:

Steps

1. First, we need to create an image resource from the JPG/GIF file using the `imagecreatefromjpeg()` or `imagecreatefromgif()` function, respectively.

// For JPG $image = imagecreatefromjpeg('path/to/image.jpg'); // For GIF $image = imagecreatefromgif('path/to/image.gif'); 

$pngImage = imagecreatetruecolor($width, $height); 

Note: `$width` and `$height` are the dimensions of the new PNG image.

1. Now, we need to copy the JPG/GIF image resource to the PNG image resource using the `imagecopy()` function.

imagecopy($pngImage, $image, 0, 0, 0, 0, $width, $height); 

Note: The parameters of the `imagecopy()` function are explained below:

• `$pngImage`: The destination PNG image resource.
• `$image`: The source JPG/GIF image resource.
• `0, 0`: The X and Y coordinates of the destination PNG image.
• `0, 0`: The X and Y coordinates of the source JPG/GIF image.
• `$width, $height`: The width and height of the destination PNG image.
• Finally, we need to save the PNG image using the `imagepng()` function.

imagepng($pngImage, 'path/to/new/image.png'); 

And that’s it! You’ve successfully converted a JPG/GIF image to PNG using PHP.

Conclusion

Converting JPG/GIF images to PNG in PHP is a straightforward process that can be accomplished using the GD Library. We hope that this guide has helped you understand how to do it with ease.

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