help me to edit photos

devil666 · 10-22-2009, 06:08 AM

hi
all i wont a program to enlarge images without spoiling the analysis

devil666 · 10-22-2009, 11:24 AM

Nobody knows;;

**Mister2** · 10-22-2009, 01:06 PM

On the contrary, I think many people know the answer. Just that they may have been at work during the 5 hours you waited for a reply.

It may also help if you posted in the correct forum - http://www.techsupportforum.com/desi...ng-multimedia/
The people who could answer your question probably don't look in the Programming forum

The short answer is what you are asking is not strictly possible. There are a fixed number of pixels in a given image. Increasing the size of the image while keeping the same resolution means you need more pixels. Obviously these extra pixels are not present in the original image, so they need to be added.

One way to do this would be to substitute more of the same pixels - if you have a red pixel then substitute it for a block of 4 red pixels of the same colour. Obviously this would have a detrimental effect on the image.

The way image editors do this, from the free Paint.net program to the expensive Photoshop suite, is to use various methods of interpolation. For example, if one pixel is light red and its neighbour is dark red then an extra medium red pixel is generated between the two. Different methods of interpolation achieve different results but they all rely on 'guessing' what the missing pixels should be.

The only way to increase image size without adding information is to reduce the resolution - go from, say, 300 ppi (pixels per inch) to 72 ppi. This would look OK on a monitor but awful when printed on paper.

Bottom line - you can remove information from an image but you can't put in what's not there.

10-22-2009, 06:08 AM	#1 (permalink)
devil666 Registered User Join Date: Oct 2009 Posts: 8 OS: win 7	help me to edit photos hi all i wont a program to enlarge images without spoiling the analysis

10-22-2009, 11:24 AM	#2 (permalink)
devil666 Registered User Join Date: Oct 2009 Posts: 8 OS: win 7	Re: help me to edit photos Nobody knows;;

10-22-2009, 01:06 PM	#3 (permalink)
Mister2 Microsoft MVP Join Date: Aug 2009 Location: Lincolnshire, UK Posts: 119 OS: Windows 7, XP SP2	Re: help me to edit photos On the contrary, I think many people know the answer. Just that they may have been at work during the 5 hours you waited for a reply. It may also help if you posted in the correct forum - http://www.techsupportforum.com/desi...ng-multimedia/ The people who could answer your question probably don't look in the Programming forum The short answer is what you are asking is not strictly possible. There are a fixed number of pixels in a given image. Increasing the size of the image while keeping the same resolution means you need more pixels. Obviously these extra pixels are not present in the original image, so they need to be added. One way to do this would be to substitute more of the same pixels - if you have a red pixel then substitute it for a block of 4 red pixels of the same colour. Obviously this would have a detrimental effect on the image. The way image editors do this, from the free Paint.net program to the expensive Photoshop suite, is to use various methods of interpolation. For example, if one pixel is light red and its neighbour is dark red then an extra medium red pixel is generated between the two. Different methods of interpolation achieve different results but they all rely on 'guessing' what the missing pixels should be. The only way to increase image size without adding information is to reduce the resolution - go from, say, 300 ppi (pixels per inch) to 72 ppi. This would look OK on a monitor but awful when printed on paper. Bottom line - you can remove information from an image but you can't put in what's not there. __________________ MVP (Consumer Security) 2007-2009 Never stop learning