From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <44506363.3070407@gmail.com> Date: Thu, 27 Apr 2006 08:23:31 +0200 From: =?UTF-8?B?TGx1w61zIEJhdGxsZSBpIFJvc3NlbGw=?= User-Agent: Mozilla Thunderbird 1.0.7 (X11/20060314) MIME-Version: 1.0 To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu> Subject: Re: [9fans] PNG and APE (cntd) References: <36acd81591ae44aee30ef39313a71dfd@proxima.alt.za> In-Reply-To: <36acd81591ae44aee30ef39313a71dfd@proxima.alt.za> Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=sha1; boundary="------------ms070005080802070903070005" Topicbox-Message-UUID: 47b45dd6-ead1-11e9-9d60-3106f5b1d025 This is a cryptographically signed message in MIME format. --------------ms070005080802070903070005 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit lucio@proxima.alt.za wrote: > I have a slightly OT question: is it reasonable that PNG versions of > an image may be bigger than their GIF equivalent and (less > sursprisingly) much bigger than their JPEG versions? I have not > tested this theory, but I have had this reported to me. I don't know if I understood correctly your question, but although GIF uses LZW instead of zlib (LZ77 iirc), it can stand only for 256 different colors - hence it my be smaller than PNG, as PNG allows 32bit colors fine (being 8 for alpha). JPEG is dependant on lossy compression (at least the actual implementations; I think a lossless was proposed, but I've never seen it), then sure it can be much smaller than PNG. --------------ms070005080802070903070005 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIJTTCC AwEwggJqoAMCAQICEC7GHhAgrXIK4gbYgnLRBvIwDQYJKoZIhvcNAQEEBQAwYjELMAkGA1UE BhMCWkExJTAjBgNVBAoTHFRoYXd0ZSBDb25zdWx0aW5nIChQdHkpIEx0ZC4xLDAqBgNVBAMT I1RoYXd0ZSBQZXJzb25hbCBGcmVlbWFpbCBJc3N1aW5nIENBMB4XDTA2MDMxMzIyNTMwMVoX DTA3MDMxMzIyNTMwMVowRDEfMB0GA1UEAxMWVGhhd3RlIEZyZWVtYWlsIE1lbWJlcjEhMB8G CSqGSIb3DQEJARYSdmlyaWtldG9AZ21haWwuY29tMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8A MIIBCgKCAQEAvULiATyjPs5ZNXAo1qG4p3B136VTuzi82L14U0YTuyUO1lrJNJypHfM1+5d5 0vYJKzzSt/sCLD76X3vO3DxC5cqC2nrchEN+GCKndpE2PM7Sp9eWrHs9IVWCfYxP5M3kLoeb 5XXeRCciHCeYJ7+6SLrftWxU2qKVtAAQMGnLghUuwMck0sWXiywDhQ3MVIPbdOEu+VGKRMRM Ncq4bFRvqNRpNfG5A+WOtsuqxTpJtdLcP0fKTIKK3N7r7k4IMYEHLTPl9iH5Ve0OPgeTekyH ADZnIjE7zweBDBH0Qh8DDTaMx5XszHAMwsChHxBmCcAjncdPnqxdShbOPshtBiPxHwIDAQAB o1IwUDAOBgNVHQ8BAf8EBAMCA/gwEQYJYIZIAYb4QgEBBAQDAgUgMB0GA1UdEQQWMBSBEnZp cmlrZXRvQGdtYWlsLmNvbTAMBgNVHRMBAf8EAjAAMA0GCSqGSIb3DQEBBAUAA4GBAFRbmD1g BXH11x+sumaBS5h4A4ejYdmB1b5u2jBhkZnfvO92RD23dnS8PKk4MdGxGQUzawyGK8JSAUJg eERQ1Xoxa/xRgTGDphoZLLBdFkkvqjrqz2h2hiXkZHGyE3yFst9UVrXDHZKOyCR9c3LaXPQp Iz2lJiADJ2BtByn43FtHMIIDATCCAmqgAwIBAgIQLsYeECCtcgriBtiCctEG8jANBgkqhkiG 9w0BAQQFADBiMQswCQYDVQQGEwJaQTElMCMGA1UEChMcVGhhd3RlIENvbnN1bHRpbmcgKFB0 eSkgTHRkLjEsMCoGA1UEAxMjVGhhd3RlIFBlcnNvbmFsIEZyZWVtYWlsIElzc3VpbmcgQ0Ew HhcNMDYwMzEzMjI1MzAxWhcNMDcwMzEzMjI1MzAxWjBEMR8wHQYDVQQDExZUaGF3dGUgRnJl ZW1haWwgTWVtYmVyMSEwHwYJKoZIhvcNAQkBFhJ2aXJpa2V0b0BnbWFpbC5jb20wggEiMA0G CSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQC9QuIBPKM+zlk1cCjWobincHXfpVO7OLzYvXhT RhO7JQ7WWsk0nKkd8zX7l3nS9gkrPNK3+wIsPvpfe87cPELlyoLaetyEQ34YIqd2kTY8ztKn 15asez0hVYJ9jE/kzeQuh5vldd5EJyIcJ5gnv7pIut+1bFTaopW0ABAwacuCFS7AxyTSxZeL LAOFDcxUg9t04S75UYpExEw1yrhsVG+o1Gk18bkD5Y62y6rFOkm10tw/R8pMgorc3uvuTggx gQctM+X2IflV7Q4+B5N6TIcANmciMTvPB4EMEfRCHwMNNozHlezMcAzCwKEfEGYJwCOdx0+e rF1KFs4+yG0GI/EfAgMBAAGjUjBQMA4GA1UdDwEB/wQEAwID+DARBglghkgBhvhCAQEEBAMC BSAwHQYDVR0RBBYwFIESdmlyaWtldG9AZ21haWwuY29tMAwGA1UdEwEB/wQCMAAwDQYJKoZI hvcNAQEEBQADgYEAVFuYPWAFcfXXH6y6ZoFLmHgDh6Nh2YHVvm7aMGGRmd+873ZEPbd2dLw8 qTgx0bEZBTNrDIYrwlIBQmB4RFDVejFr/FGBMYOmGhkssF0WSS+qOurPaHaGJeRkcbITfIWy 31RWtcMdko7IJH1zctpc9CkjPaUmIAMnYG0HKfjcW0cwggM/MIICqKADAgECAgENMA0GCSqG SIb3DQEBBQUAMIHRMQswCQYDVQQGEwJaQTEVMBMGA1UECBMMV2VzdGVybiBDYXBlMRIwEAYD VQQHEwlDYXBlIFRvd24xGjAYBgNVBAoTEVRoYXd0ZSBDb25zdWx0aW5nMSgwJgYDVQQLEx9D ZXJ0aWZpY2F0aW9uIFNlcnZpY2VzIERpdmlzaW9uMSQwIgYDVQQDExtUaGF3dGUgUGVyc29u YWwgRnJlZW1haWwgQ0ExKzApBgkqhkiG9w0BCQEWHHBlcnNvbmFsLWZyZWVtYWlsQHRoYXd0 ZS5jb20wHhcNMDMwNzE3MDAwMDAwWhcNMTMwNzE2MjM1OTU5WjBiMQswCQYDVQQGEwJaQTEl MCMGA1UEChMcVGhhd3RlIENvbnN1bHRpbmcgKFB0eSkgTHRkLjEsMCoGA1UEAxMjVGhhd3Rl IFBlcnNvbmFsIEZyZWVtYWlsIElzc3VpbmcgQ0EwgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJ AoGBAMSmPFVzVftOucqZWh5owHUEcJ3f6f+jHuy9zfVb8hp2vX8MOmHyv1HOAdTlUAow1wJj WiyJFXCO3cnwK4Vaqj9xVsuvPAsH5/EfkTYkKhPPK9Xzgnc9A74r/rsYPge/QIACZNenpruf ZdHFKlSFD0gEf6e20TxhBEAeZBlyYLf7AgMBAAGjgZQwgZEwEgYDVR0TAQH/BAgwBgEB/wIB ADBDBgNVHR8EPDA6MDigNqA0hjJodHRwOi8vY3JsLnRoYXd0ZS5jb20vVGhhd3RlUGVyc29u YWxGcmVlbWFpbENBLmNybDALBgNVHQ8EBAMCAQYwKQYDVR0RBCIwIKQeMBwxGjAYBgNVBAMT EVByaXZhdGVMYWJlbDItMTM4MA0GCSqGSIb3DQEBBQUAA4GBAEiM0VCD6gsuzA2jZqxnD3+v rL7CF6FDlpSdf0whuPg2H6otnzYvwPQcUCCTcDz9reFhYsPZOhl+hLGZGwDFGguCdJ4lUJRi x9sncVcljd2pnDmOjCBPZV+V2vf3h9bGCE6u9uo05RAaWzVNd+NWIXiC3CEZNd4ksdMdRv9d X2VPMYIDZDCCA2ACAQEwdjBiMQswCQYDVQQGEwJaQTElMCMGA1UEChMcVGhhd3RlIENvbnN1 bHRpbmcgKFB0eSkgTHRkLjEsMCoGA1UEAxMjVGhhd3RlIFBlcnNvbmFsIEZyZWVtYWlsIElz c3VpbmcgQ0ECEC7GHhAgrXIK4gbYgnLRBvIwCQYFKw4DAhoFAKCCAcMwGAYJKoZIhvcNAQkD MQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMDYwNDI3MDYyMzMxWjAjBgkqhkiG9w0B CQQxFgQUGMrwohGYsFWvEwXibyWBlLvjYjswUgYJKoZIhvcNAQkPMUUwQzAKBggqhkiG9w0D BzAOBggqhkiG9w0DAgICAIAwDQYIKoZIhvcNAwICAUAwBwYFKw4DAgcwDQYIKoZIhvcNAwIC ASgwgYUGCSsGAQQBgjcQBDF4MHYwYjELMAkGA1UEBhMCWkExJTAjBgNVBAoTHFRoYXd0ZSBD b25zdWx0aW5nIChQdHkpIEx0ZC4xLDAqBgNVBAMTI1RoYXd0ZSBQZXJzb25hbCBGcmVlbWFp bCBJc3N1aW5nIENBAhAuxh4QIK1yCuIG2IJy0QbyMIGHBgsqhkiG9w0BCRACCzF4oHYwYjEL MAkGA1UEBhMCWkExJTAjBgNVBAoTHFRoYXd0ZSBDb25zdWx0aW5nIChQdHkpIEx0ZC4xLDAq BgNVBAMTI1RoYXd0ZSBQZXJzb25hbCBGcmVlbWFpbCBJc3N1aW5nIENBAhAuxh4QIK1yCuIG 2IJy0QbyMA0GCSqGSIb3DQEBAQUABIIBAE9F3AyrlN13icNYTjgR/l3VLFRi4hPtvWTBdquN 1qtXhy2mC5qkB5hszPvTvWUeWLP4KThGVfi5pAC6BA+g+AG/giTKZE8/2CPtUE1gZmgdfTuh xopKC6Vqz0F4htUgybS4bW7GwLvAavAOvDffXFXFaVT/OhUm5OMKAxvIzEz61hrXxjJujdFo ws1Qx0zD/P0Xvn/jxQH4FwIVub/hdcpfhUFb31NJG7HXFRPerDNrbS0d/sW9QNFwcan8UREI AQKSbaPUmUamUYZOxJdsgJk/XqBQIw9Ii1q/QcHF4M/PixhZ5mNR32NudRitmuhnnYiuynZO lfShuUj/4OPeossAAAAAAAA= --------------ms070005080802070903070005--