UPLOAD PORTRAIT CRASHES

Hello,
I have a problem during the upload of a portrait (front-end or back-end)), when the size of the picture is too important: there is no description of error but this crash of php : PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 42752001 bytes) in /Applications/MAMP/htdocs/terrasses/libraries/CBLib/Imagine/Gd/Image.php on line 617.
Could you help me, please ?
Joomla 3.4.8 CB 2.0.12

ZENNER68 wrote: Hello,
I have a problem during the upload of a portrait (front-end or back-end)), when the size of the picture is too important: there is no description of error but this crash of php : PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 42752001 bytes) in /Applications/MAMP/htdocs/terrasses/libraries/CBLib/Imagine/Gd/Image.php on line 617.
Could you help me, please ?
Joomla 3.4.8 CB 2.0.12

Your PHP memory is maxing out during image upload resampling.

You can increase it.

Thank you for your response, but how can I increase it ?

ZENNER68 wrote: Thank you for your response, but how can I increase it ?

There is a php.ini parameter - google for it.

Hello,
Excuse me but I am not a php professional and I need some precision.
I understand that I have to personalize the php.ini file.
But in it, there are a lot of parameters and I don’t know the one I have to modify. Could you be more precise ?
I looked for on Web but I found nothing.
(Excuse me for my poor english but I am French)