Railfan Technology > file conversion

I have taken pics with my cellphone.  The pic is fine, but a very small file size.  Is there a way to enlarge the file to 1 MB?  

You cannot increase the size of a bitmap file (image) and maintain the original quality. Check the camera settings on the phone to make sure it is capturing the highest resolution possible. It's easy to downsample a bitmap, but upsampling is always a compromise, even with the best interpolation algorithms. 

What kind of phone gives bitmaps with no option to do jpegs? Usually producing files to large is the problem.
RB

A JPEG is a bitmap.

trainjunkie Wrote:
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> A JPEG is a bitmap.

Using a lossy compression algorithm, which may or may not be a problem, depending on what you want to do with the image.

I think we are dancing around the problem.  How are you determining the file size. Where/ how are you viewing your image. Also, as mentioned, look at camera settings. I have a pretty basic android phone and the images are pretty large where I will edit them down to 1024 x  before I text them, I think they are 5x that.

Bob

newtonville150 Wrote:
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> Using a lossy compression algorithm, which may or
> may not be a problem, depending on what you want
> to do with the image.

Not relevant. You are over complicating a simple question. You cannot add pixels to a bitmap to successfully "interpolate" the image to be larger. It's not like a vector file that is infinitely scaleable, up or down. File compression isn't particularly relevant because it doesn't change the base number of pixels in a bitmap image. Lossy compression discards other data, but not pixels.