Re: Images and Image Data
If anyone has time on their hands, I found some useful resources on image filter algorithms: Image Processing: Algorithms http://www.efg2.com/Lab/Library/ImageProcessing/Algorithms.htm The Filter Factory Programming Guide http://thepluginsite.com/knowhow/ffpg/ffpg.htm -- Richard Gaskin Fourth World Media Corporation Custom Software and Web Development for All Major Platforms Developer of WebMerge 2.0: Publish any Database on Any Site ___ [EMAIL PROTECTED] http://www.FourthWorld.com Tel: 323-225-3717 AIM: FourthWorldInc ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard
Re: Images and Image Data
Brian, that's awesome! How long have you know this and not told anyone? ;-) For about 10 minutes after I played with much uglier scripts (try building aData by concatenating it with itself- binary speed but UGLY script). And about 10 minutes before I posted it =). Anyway, thanks for being the intrepid soul to start the ball rolling. Brian ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard
Re: Images and Image Data
My pleasure, but I just discovered that the order of bytes in the imageData is *different* on Windows than it is on Mac. On Windows it's BGRO, and on Mac, it's ORGB. Something having to do with big endian/little endian issues, I believe. This has already been sent to Scott; hopefully it will be fixed soon. Ken Ray Sons of Thunder Software Email: [EMAIL PROTECTED] Web Site: http://www.sonsothunder.com/ - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Saturday, July 06, 2002 2:21 PM Subject: Re: Images and Image Data Brian, that's awesome! How long have you know this and not told anyone? ;-) For about 10 minutes after I played with much uglier scripts (try building aData by concatenating it with itself- binary speed but UGLY script). And about 10 minutes before I posted it =). Anyway, thanks for being the intrepid soul to start the ball rolling. Brian ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard
Re: Images and Image Data
I have a strong feeling that this won't be fixable- since imageData points to actual bytes in memory which happen to lie differently on Windows and Mac platforms. Luckily, once can always test the platform and proceed accordingly- I think you'll find Macs agree with UNIX and LINUX, and Windows is the odd-ball. Brian My pleasure, but I just discovered that the order of bytes in the imageData is *different* on Windows than it is on Mac. On Windows it's BGRO, and on Mac, it's ORGB. Something having to do with big endian/little endian issues, I believe. This has already been sent to Scott; hopefully it will be fixed soon. ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard
Re: Images and Image Data
On Fri, 5 Jul 2002 [EMAIL PROTECTED] wrote: Would this run faster? Definitely, but there's one other optimization: Don't call binaryEncode so much, it's pretty expensive: on mouseUp put fld data into tOrigData set the itemdelimiter to TAB create image put it into tID set the width of tID to tWidth set the height of tID to tHeight local tbp, tgp put binaryEncode(,0,0,255,0) into tgp put binaryEncode(,0,0,0,255) into tbp put empty into iData repeat for each line l in tOrigData repeat for each item i in l if i 0 then put tgp after iData ---make green else put tbp after iData --- make blue end repeat end repeat set the imageData of tID to iData end mouseUp Regards, Scott Philip Chumbley Scott Raney [EMAIL PROTECTED] http://www.metacard.com MetaCard: You know, there's an easier way to do that... ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard
Re: Images and Image Data
While we are still on this thread... (thanks Ken, Scott- cool stuff)... If you want to use alphaData to adjust the opacity of images, this works real fast: setprop opacity x put min(100,x) into x put max(1,x) into x put the alphaData of me into aData replace (char 1 of aData) with binaryEncode(C,(255*x/100)) in aData set the alphaData of me to aData end opacity Then just say: ## 75% opacity set the opacity of image someImage to 75 DISCLAIMER: don't use this method if you do anything which sets alphaData values which vary anywhere within the alphaData. If you do, you can do this, which is still faster than building byte-by-byte: put binaryEncode(C,(255*x/100)) into x repeat with i=1 to 255 replace numToChar(i) with x in aData end repeat Best Regards, Brian ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard
RE: Images and Image Data
Why don't you just do set the blendlevel of img someimage to 75 Does the same thing on my Windows machine. ? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of [EMAIL PROTECTED] Sent: Friday, July 05, 2002 6:20 PM To: [EMAIL PROTECTED] Subject: Re: Images and Image Data While we are still on this thread... (thanks Ken, Scott- cool stuff)... If you want to use alphaData to adjust the opacity of images, this works real fast: setprop opacity x put min(100,x) into x put max(1,x) into x put the alphaData of me into aData replace (char 1 of aData) with binaryEncode(C,(255*x/100)) in aData set the alphaData of me to aData end opacity Then just say: ## 75% opacity set the opacity of image someImage to 75 DISCLAIMER: don't use this method if you do anything which sets alphaData values which vary anywhere within the alphaData. If you do, you can do this, which is still faster than building byte-by-byte: put binaryEncode(C,(255*x/100)) into x repeat with i=1 to 255 replace numToChar(i) with x in aData end repeat Best Regards, Brian ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard
Re: Images and Image Data
Michael Crawford wrote: I have a little project in which I want to convert an array of numbers from a text file into an image file. This will be done by making the highest number white and the lowest number in the array black. The number in between will be assigned a grey value depending on the amount. For example 100,50,0,50,100 would make an image 1 pixel high and 5 pixels across. The end pixels would be white the middle one black and the ones either side 50% grey. Manipulating the numbers is fine but generating the image from those numbers is proving problematic. I can see that you should use the ImageData property to do this but how just seems completely beyound me at the moment. Does any one have any examples or pointers on how I should go about doing this? You must have missed this post from Ken yesterday -- sounds like just what the doctor ordered: - From: Ken Ray *Subject: Fun With ImageData, MaskData and AlphaData *Date: Tue, 02 Jul 2002 22:14:19 -0700 Just wanted to let you all know that I've been working with these cool image-manipulation features of MetaCard and wrapped my head around them enough to write up a treatise on how to use them along with some examples. Here's the relevant links to the Tips section of the MetaCard page of my site to those who are interested : http://www.sonsothunder.com/devres/metacard/metacard.htm Click on the following links: imag003 - Understanding ImageData, MaskData and AlphaData imag004 - Making a Single Color Transparent Using MaskData imag005 - Making an Image Translucent Using AlphaData Enjoy! Ken Ray Sons of Thunder Software Email: [EMAIL PROTECTED] Web Site: http://www.sonsothunder.com/ - -- Richard Gaskin Fourth World Media Corporation Custom Software and Web Development for All Major Platforms Developer of WebMerge 2.0: Publish any Database on Any Site ___ [EMAIL PROTECTED] http://www.FourthWorld.com Tel: 323-225-3717 AIM: FourthWorldInc ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard
Images and Image Data
I have a little project in which I want to convert an array of numbers from a text file into an image file. This will be done by making the highest number white and the lowest number in the array black. The number in between will be assigned a grey value depending on the amount. For example 100,50,0,50,100 would make an image 1 pixel high and 5 pixels across. The end pixels would be white the middle one black and the ones either side 50% grey. Manipulating the numbers is fine but generating the image from those numbers is proving problematic. I can see that you should use the ImageData property to do this but how just seems completely beyound me at the moment. Does any one have any examples or pointers on how I should go about doing this? Thanks Michael ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard
Re: Images and Image Data
Michael, Check out my tutorial on imageData at: http://www.sonsothunder.com/devres/revolution/revolution.htm Click on the following links on that page: imag003 - Understanding ImageData, MaskData and AlphaData as a start to get a handle on how to manipulate imageData. What you're going to want to do in your script is: 1) Create an image object with no image in it. 2) Use the binaryEncode() function to create binary values for each pixel of the image to be created and store it in a variable. 3) Set the imageData of the image object to the variable that contains the binary. Here's an example of a script that creates a 20x20 image that is pure blue: on mouseUp create image put it into tID set the width of tID to 20 set the height of tID to 20 put empty into iData repeat with i = 1 to 20 repeat with j = 1 to 20 put binaryEncode(,255,0,0,0) after iData end repeat end repeat set the imageData of tID to iData end mouseUp Hope this helps, Ken Ray Sons of Thunder Software Email: [EMAIL PROTECTED] Web Site: http://www.sonsothunder.com/ - Original Message - From: Michael Crawford [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, July 03, 2002 11:46 PM Subject: Images and Image Data I have a little project in which I want to convert an array of numbers from a text file into an image file. This will be done by making the highest number white and the lowest number in the array black. The number in between will be assigned a grey value depending on the amount. For example 100,50,0,50,100 would make an image 1 pixel high and 5 pixels across. The end pixels would be white the middle one black and the ones either side 50% grey. Manipulating the numbers is fine but generating the image from those numbers is proving problematic. I can see that you should use the ImageData property to do this but how just seems completely beyound me at the moment. Does any one have any examples or pointers on how I should go about doing this? Thanks Michael ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard ___ metacard mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/metacard
