Which PHP Image function to use?

[Bastien]

Hi All,

I am wondering what function to use. I need to open an image (likely TIFF format) and read one line of pixels from an area near the top of the page (Its a barcode reader for faxes) and examine that 'string' of pixels for the color...

Just unsure how to best approach this.

TIA



Bastien

Cat, the other other white meat

 

[Westbury]

hmmm, just quickly having a think while looking at the ol' doumentation I would suggest opening the image using imagecreatefromjpeg (

http://www.php.net/manual/en/function.imagecreatefromjpeg.php)

function.
Then use imagecopy (

http://www.php.net/manual/en/function.imagecopy.php)

function to copy a single line of pixels from that orginal in a second temporary image.
Finally, use imagecolorat (

http://www.php.net/manual/en/function.imagecolorat.php)

function in a for loop to effectively scan across your newly created cross section.

I would produce some sample code for you but its getting late. This should at least point you in the right direction

If it aint broke, redesign it!

 

[Bastien]

Thanks, I had thought of the image copy and the imagecolorat functions, it was the first I was puzzling over

This'll get me started..

Bastien

Cat, the other other white meat

 

[Olavxxx]

ps. if you generate truecolor images, use the imagecreatetruecolor(), or you will see that your images become grey-ish!