BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  File Type tips          BorlandTalk.com Forum Index -> Delphi Graphics View previous topic :: View next topic   Author Message John Cooper Guest Posted: Mon Oct 03, 2005 6:07 pm    Post subject: File Type tips Hello guys I need some tips to write image files on database. I need some information some the best file type, colors, compression, quality, etc... My images will be black an white. Can anyone help me? Thanks a lot! Back to top Ivan Sivak Jr. Guest Posted: Mon Oct 03, 2005 6:43 pm    Post subject: Re: File Type tips hi, I think you could use GIF, make histogram and choose the best possible value.... I guess this url could help you http://www.wotsit.org/search.asp?s=graphics regards, ivan "John Cooper" <john.n.cooper (AT) gmail (DOT) com> pí¹e v diskusním pøíspìvku news:4341727f (AT) newsgroups (DOT) borland.com... Quote: Hello guys I need some tips to write image files on database. I need some information some the best file type, colors, compression, quality, etc... My images will be black an white. Can anyone help me? Thanks a lot! Back to top Ben Hochstrasser Guest Posted: Mon Oct 03, 2005 6:59 pm    Post subject: Re: File Type tips John Cooper wrote: Quote: My images will be black an white. Black and white (1 bit) or grayscale (8 bit)? Loss (jpeg) or lossless (PNG/TIF/PCX etc)? Do you want them to store within the DB file (aka blob) or merely have a (random) filename in the DB and store the file within the file system? -- Ben Back to top John Cooper Guest Posted: Mon Oct 03, 2005 7:34 pm    Post subject: Re: File Type tips Gray scale is good. Lossless is a good choice too. My idea is store all images on a database. My images will be some personal signatures. Thanks Ben! "Ben Hochstrasser" <bhoc@tiscali123^H^H^H.ch> escreveu na mensagem news:Xns96E4D58EF7839bhoc (AT) 207 (DOT) 105.83.66... Quote: John Cooper wrote: My images will be black an white. Black and white (1 bit) or grayscale (8 bit)? Loss (jpeg) or lossless (PNG/TIF/PCX etc)? Do you want them to store within the DB file (aka blob) or merely have a (random) filename in the DB and store the file within the file system? -- Ben Back to top GrandmasterB Guest Posted: Mon Oct 03, 2005 7:47 pm    Post subject: Re: File Type tips "John Cooper" <john.n.cooper (AT) gmail (DOT) com> wrote Quote: I need some tips to write image files on database. I need some information some the best file type, colors, compression, quality, etc... My images will be black an white. Can anyone help me? I dont think the db will care one way or another what file type you use. Its all binary data to the db. It'd be better to select a file type based on what you're using the image for in the end. That being said, unless you have a particularly good reason that you specifically *need* to store the file in the db itself, I'd recommend NOT doing so. Rather, store the image as a file on disk, and then just create records in your database that point to the file in your db. One easy way to do it is if you have a 'files' table, use the unique identifier for each row as part of the file name that applies to that record. The row with an id of 133 would map to 133.tif, for example. A better way, as someone else already mentioned, is to use a unique random string or hash to point to the file. Back to top Ben Hochstrasser Guest Posted: Mon Oct 03, 2005 7:50 pm    Post subject: Re: File Type tips John Cooper wrote: Quote: Gray scale is good. Lossless is a good choice too. My idea is store all images on a database. My images will be some personal signatures. Take PNG. -- Ben Back to top John Cooper Guest Posted: Mon Oct 03, 2005 7:58 pm    Post subject: Re: File Type tips Thank Ben I will try it! "Ben Hochstrasser" <bhoc@tiscali123^H^H^H.ch> escreveu na mensagem news:Xns96E4DE2EEC4CCbhoc (AT) 207 (DOT) 105.83.66... Quote: John Cooper wrote: Gray scale is good. Lossless is a good choice too. My idea is store all images on a database. My images will be some personal signatures. Take PNG. -- Ben Back to top John Cooper Guest Posted: Mon Oct 03, 2005 8:18 pm    Post subject: Re: File Type tips But in this case, some user can accidentally delete some file. "GrandmasterB" <Fizzle (AT) shizzle (DOT) com> escreveu na mensagem news:43418a0d$1 (AT) newsgroups (DOT) borland.com... Quote: "John Cooper" <john.n.cooper (AT) gmail (DOT) com> wrote in message news:4341727f (AT) newsgroups (DOT) borland.com... I need some tips to write image files on database. I need some information some the best file type, colors, compression, quality, etc... My images will be black an white. Can anyone help me? I dont think the db will care one way or another what file type you use. Its all binary data to the db. It'd be better to select a file type based on what you're using the image for in the end. That being said, unless you have a particularly good reason that you specifically *need* to store the file in the db itself, I'd recommend NOT doing so. Rather, store the image as a file on disk, and then just create records in your database that point to the file in your db. One easy way to do it is if you have a 'files' table, use the unique identifier for each row as part of the file name that applies to that record. The row with an id of 133 would map to 133.tif, for example. A better way, as someone else already mentioned, is to use a unique random string or hash to point to the file. Back to top Ben Hochstrasser Guest Posted: Mon Oct 03, 2005 8:24 pm    Post subject: Re: File Type tips John Cooper wrote: Quote: But in this case, some user can accidentally delete some file. That's what we have NTFS for... -- Ben Back to top GrandmasterB Guest Posted: Mon Oct 03, 2005 8:36 pm    Post subject: Re: File Type tips "John Cooper" <john.n.cooper (AT) gmail (DOT) com> wrote Quote: But in this case, some user can accidentally delete some file. Some user can accidentally delete the database file, or delete the executable itself. So what? You asked a very vague question and didnt give any indication about where the images were coming from, in what way the images were being used, the quantity of them, etc. So you got a generic answer. I've designed large scale document imaging systems - we're talking tracking in the hundreds of millions of documents and other files. So I was offering a lesson I learned from doing that. Back to top John Cooper Guest Posted: Mon Oct 03, 2005 8:50 pm    Post subject: Re: File Type tips Ben tell me a tip to save my images on a file system. Then, my last question is about this, if a user accidentally delete some file saved on the file system. Maybe I have about 10.000 images. I want to save on the database basically by security and backup questions. Thanks again "GrandmasterB" <Fizzle (AT) shizzle (DOT) com> escreveu na mensagem news:434195d7$1 (AT) newsgroups (DOT) borland.com... Quote: "John Cooper" <john.n.cooper (AT) gmail (DOT) com> wrote in message news:4341912c (AT) newsgroups (DOT) borland.com... But in this case, some user can accidentally delete some file. Some user can accidentally delete the database file, or delete the executable itself. So what? You asked a very vague question and didnt give any indication about where the images were coming from, in what way the images were being used, the quantity of them, etc. So you got a generic answer. I've designed large scale document imaging systems - we're talking tracking in the hundreds of millions of documents and other files. So I was offering a lesson I learned from doing that. Back to top Ben Hochstrasser Guest Posted: Mon Oct 03, 2005 10:18 pm    Post subject: Re: File Type tips John Cooper wrote: Quote: Ben tell me a tip to save my images on a file system. Then, my last question is about this, if a user accidentally delete some file saved on the file system. Maybe I have about 10.000 images. I want to save on the database basically by security and backup questions. Why don't you make use of the NTFS security? Give the user readonly access and the admins even less. ;-) -- Ben Back to top Rick Francken Guest Posted: Tue Oct 04, 2005 2:22 am    Post subject: Re: File Type tips "Ben Hochstrasser" wrote in message Quote: Why don't you make use of the NTFS security? Give the user readonly access and the admins even less. LOL! Back to top Marc Pelletier Guest Posted: Tue Oct 04, 2005 2:30 pm    Post subject: Re: File Type tips "John Cooper" <john.n.cooper (AT) gmail (DOT) com> wrote in news:434186db (AT) newsgroups (DOT) borland.com: Quote: My images will be some personal signatures. John, This is a bit of a digression, but at a previous employer we had to capture signatures from one of those pen pads that couriers use. Filesize was a major issue. One of my coworkers came up with the idea of simply capturing the mouse commands that are triggered when the person signs. It was obviously an exact copy of the signature, and was way less data. A very elegant solution, I wish I could claim it was mine! cheers Marc Pelletier Back to top Jens Gruschel Guest Posted: Tue Oct 04, 2005 4:35 pm    Post subject: Re: File Type tips Quote: This is a bit of a digression, but at a previous employer we had to capture signatures from one of those pen pads that couriers use. Filesize was a major issue. One of my coworkers came up with the idea of simply capturing the mouse commands that are triggered when the person signs. It was obviously an exact copy of the signature, and was way less data. A very elegant solution, I wish I could claim it was mine! Just a bit more off topic... It's similar to character recogition on PDAs. It's much simpler to use follow the pen than trying to recognize the characters from the image drawn with the pen. Jens -- Jens Gruschel http://www.pegtop.net Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> Delphi Graphics All times are GMT Page 1 of 1   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.