{
    "mode": "man",
    "parameter": "ppmbrighten",
    "section": "1",
    "url": "https://www.chedong.com/phpMan.php/man/ppmbrighten/1/json",
    "generated": "2026-06-15T16:42:09Z",
    "synopsis": "ppmbrighten [-n] [-s <+- saturation>] [-v <+- value>] <ppmfile>",
    "sections": {
        "NAME": {
            "content": "ppmbrighten - change an images Saturation and Value from an HSV map\n",
            "subsections": []
        },
        "SYNOPSIS": {
            "content": "ppmbrighten [-n] [-s <+- saturation>] [-v <+- value>] <ppmfile>\n",
            "subsections": []
        },
        "DESCRIPTION": {
            "content": "Reads a portable pixmap as input.  Converts the image from RGB space to HSV space and changes\nthe Value by <+- value> as a percentage.  Likewise with the Saturation.  Doubling  the  Value\nwould involve\n\nppmbrighten -v 100\n\nto add 100 percent to the Value.\n\nThe 'n' option normalizes the Value to exist between 0 and 1 (normalized).\n",
            "subsections": []
        },
        "SEE ALSO": {
            "content": "pgmnorm(1), ppm(5)\n",
            "subsections": []
        },
        "AUTHOR": {
            "content": "Copyright (C) 1990 by Brian Moffet Copyright (C) 1989 by Jef Poskanzer.\n\nPermission  to  use, copy, modify, and distribute this software and its documentation for any\npurpose and without fee is hereby granted, provided that the above copyright notice appear in\nall  copies and that both that copyright notice and this permission notice appear in support‐\ning documentation.  This software is provided \"as is\" without express or implied warranty.\n",
            "subsections": []
        },
        "NOTES": {
            "content": "This program does not change the number of colors.\n\n\n\n20 Nov 1990                              ppmbrighten(1)",
            "subsections": []
        }
    },
    "summary": "ppmbrighten - change an images Saturation and Value from an HSV map",
    "flags": [],
    "examples": [],
    "see_also": [
        {
            "name": "pgmnorm",
            "section": "1",
            "url": "https://www.chedong.com/phpMan.php/man/pgmnorm/1/json"
        },
        {
            "name": "ppm",
            "section": "5",
            "url": "https://www.chedong.com/phpMan.php/man/ppm/5/json"
        }
    ],
    "tldr": {
        "source": "official",
        "description": "This command has been superseded by `pambrighten`.",
        "examples": [
            {
                "description": "View documentation for the current command",
                "command": "tldr pambrighten"
            }
        ]
    }
}