Contents
What is required for using image functions in PHP?
GD and Image Functions ¶
- gd_info — Retrieve information about the currently installed GD library.
- getimagesize — Get the size of an image.
- getimagesizefromstring — Get the size of an image from a string.
- image_type_to_extension — Get file extension for image type.
What is required to use an image function?
You will need to compile PHP with the GD library of image functions for this to work. GD and PHP may also require other libraries, depending on which image formats you want to work with. You can use the image functions in PHP to get the size of JPEG, GIF, PNG, SWF, TIFF and JPEG2000 images.
Which is not image build function in PHP?
PHP | imagecreate() Function This function returns the blank image of given size. In general imagecreatetruecolor() function is used instead of imagecreate() function because imagecreatetruecolor() function creates high quality images.
How does the image function work in PHP?
It works the same way as regular imagejpeg/imagepng do and only supports GD2.0 true colour bitmaps (which is what’s required by ExcelWriter). I wrote an online overview of the image functions that people might find useful.
How to convert an image to a PGM in PHP?
I wrote a simple function to convert an image resource to PGM (portable graymap) in order to feed it to an OCR program. It works just like the rest of the image output functions, and will convert to grayscale for you: $pgm = “P5 “.imagesx($image).” “.imagesy($image).” 255 “;
How to convert an image to grayscale in PHP?
It works just like the rest of the image output functions, and will convert to grayscale for you: $pgm = “P5 “.imagesx($image).” “.imagesy($image).” 255 “; It works the same way as regular imagejpeg/imagepng do and only supports GD2.0 true colour bitmaps (which is what’s required by ExcelWriter).
Where can I find the unsharp mask function in PHP?
I have come across a php Unsharp Mask function which works like a charm on both of the servers I dealt with. It can be found at http://vikjavev.no/hovudsida/umtestside.php. Representation decimal of a color in hexadecimal for use on functions of library GD.