Dear group: suppose I import the image of a horse and of a cat, and I want to produce a combined image, with the head of the cat and the boy of the horse. How can I proceed? Thanks Francisco

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5/21/2014 8:14:46 AM

Does somebody know why I get different behaviour for the following commands in a commandline session of mathematica 7 or inside a notebook? It also seems to be different in different Mathematica versions for the notebook format. See http://www.risc.jku.at/people/hemmecke/mathematica/ for the notebook files for Mathematica 5.2, 6.0, 7.0. Can someone explain the General::dupsym: The symbol Array with context A` already exists. message? Why does that message appear at all? If A`Array exists, then Mathematica should just use it, shouldn't it? According to http://reference.wol...

I use an epson perfection 4870 photo. the images are usually soft. is this a common complaint and is there any way to enhance the sharpness other than the unsharp mask filters? thanks in advance. DNT wrote: > I use an epson perfection 4870 photo. the images are usually soft. is > this a common complaint and is there any way to enhance the sharpness > other than the unsharp mask filters? thanks in advance. Hi... You might like to take a look at Focus Magic... (focusmagic.com) Take care. Ken On 9 May 2006 20:04:07 -0700, "DNT" <THEIMER24@NETZ...

Assuming one needs to have a function returning false or true on each call in pseudo-random order.and using JavaScript native Math.random() method as the basis of the pseudo-randomness. Say the variants of such function are: getAnswer1() { var n = Math.round(Math.random()); return n ? true : false; } getAnswer2() { var n = Math.floor(Math.random()*2); return (n==2) ? true : false; } Leaving obvious practical testing by platforms aside: Is there are theoretical considerations that pseudo-randomness (predictability) of either of above will be better or worse than the o...

Dear friends, I have an elevation satellite image that each pixel in this image has elevation value. For example, if we select one pixe (e.g. image(10,10)= 1300 m) which is the elevation value for this pixel location. I need to convert this elevation image into spectral image so that each pixel will have a spectral value (RGB value). I would apprecaite any comments or suggestions regarding this. Best regards Nadir ...

On 3/23/10 at 4:23 AM, hemmecke@gmail.com (hemmecke) wrote: >Does somebody know why I get different behaviour for the following >General::dupsym: The symbol Array with context A` already exists. >message? Why does that message appear at all? If A`Array exists, >then Mathematica should just use it, shouldn't it? >According to >http://reference.wolfram.com/mathematica/tutorial/Contexts.html we >have: >`name a symbol in the current context >So why is Mathematica complaining? The message is not telling you the symbol exists in the current cont...

I taught a group of 32 smart high school kids some Mathematica this week, at the Vermont Governor's Institute in Mathematical Sciences, aka Math Camp. This is my second year doing it, and it's a ton of fun. I had the kids an hour a day in one of our computer equipped classrooms, and this year we added some additional optional computer time in the late afternoons so they could come back and continue working / playing around. (Last year some of them wanted more time, but there was no time in the schedule when they could come back.) You might enjoy looking at graphs and a...

Why are scanned images invariably soft (out-of-focus)? It doesnt matter if the original is film (neg or transparency) or print.Can you explain it ? I have a good film scanner (Polaroid 120) and Silverfast Ai software (which has a focus on/off). My flatbed is somewhat older (Microtek Scanmaker III with Scanwizard) but still decent. When I open the images in Photoshop I'm always disappointed in how 'soft' they are and they Always need sharpening applied. Apparently 'it's a fact of life' but why ? "frankg" <whosoever@wherever.com> wrote: >Why are ...

Why are scanned images invariably soft (out-of-focus)? It doesnt matter if the original is film (neg or transparency) or print.Can you explain it ? I have a good film scanner (Polaroid 120) and Silverfast Ai software (which has a focus on/off). My flatbed is somewhat older (Microtek Scanmaker III with Scanwizard). When I open the images in Photoshop I'm always disappointed in how 'soft' they are and they Always need sharpening applied. On Thu, 30 Sep 2004 11:08:50 -0400, "frankg" <whosoever@wherever.com> wrote: >Why are scanned images invari...

Dear all, I have a binary image in which I'd like to use the mouse to draw (freehand) on top of the image, and use this in Mathematica. Presently, I can import the image into a painting program, use its sketching facilities, then cut and paste into Mathematica. I can extract the matrix if I wish by using ImageData. Is there a way of drawing on the image directly in Mathematica to save me cutting and pasting between programs? I've worked out how to create a graphic and draw into it using the Mathematica graphics drwaing tools, but my problem is either the graphic is fa...

Hi, I am going to fulfil a lifelong dream and will embark on a long distance physics university course in autumn after spending most of my working life as a professional musician in the abstract world of music. For this endeavour I have to brush up and recover my long lost maths basics. After discovering and trying out Mathematica I have purchased the home version of this amazing program which, after spending some time with it, I consider to be the swiss knife of everything. I would like to ask for recommendations about what would be the best way to use the program...

If I scan a print that has a textured surface, can that cause the image to be soft? are non-textured images sharp - much sharper ? Most any scan with a flatbed will need some sharpening. Otherwise, part of the image may be out of focus slightly. The other thing that can happen is a moire type interference. Try turning the image 5-10 degrees, 45 degrees, etc and see if that helps. regards, DNT wrote: > If I scan a print that has a textured surface, can that cause the image > to be soft? > if flat beds aren't the best for scanning, which ones are? and wh...

How will we convert binary image to indexed image? And then the indexed image to RGB image in Matlab? ...

I'm a newbiwe trying to position one small image on top of a larger one. Based on various examples, I'm trying the solution below. Only problem is that it doesn't work :-( Both x and y in the example below always seem to be 0. Any pointers would be appreciated. Jim Buzbee <html> <body> <br/> <br/> <br/> <img src="relief.jpg" width="640" height="320" id="base"/> <img src="overlay.gif" width="10 height="10" id="overlay"/> <script> document...

Hi all, I am new here working on image processing . I have set of cropped images having faces in it but there are some images in it which does not have faces. I am using PCA for making classification I have done following steps. 1.created data set of training images. 2. calculate average of these data set & subtracted from data set matrix. 3.applied PCA to find eigen vectors of covariance matrix. After that I don’t know what to do. Can you give me guideline to go forword. Waiting for your reply. thanks in advance. "Vishwasrao " <vishwasrao.salunkhe@gmail.com&...

hello, these days i am trying some hiding process in an image. Like hiding some text in an image or hiding image in an image. Let suppose i have image of 256x256, and i want to hide another image of same size or of smaller size. how can i do that? thanks in advance. On May 6, 12:45=A0am, "Learner " <farhan7...@gmail.com> wrote: > hello, > > these days i am trying some hiding process in an image. Like hiding some = text in an image or hiding image in an image. > > Let suppose i =A0have image of 256x256, and i want to hide another image = of same size...

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