The resolution doesn't change the number of pixels, just the display size of a pixel -- increasing resolution makes the display larger, but doesn't make the file larger.
If you make a JPEG that repeats the same information over and over again it will get bigger -- the compression is on a 8x8 cell basis -- if you have more cells, you'll have more data. To make them bigger, encode with quality set to 100. Another thing, JPEG strips out luminance on a cell basis, so variation in hue compresses worse than variation in luminance.
I used my company's product, DotImage, to create a 10mb jpg with this code. You could download an eval and try it out, or do the same with your image SDK.
using System;
using System.Drawing;
using Atalasoft.Imaging;
using Atalasoft.Imaging.Codec;
using Atalasoft.Imaging.Drawing;
namespace MakeLargeImage
{
class Program
{
static void Main(string[] args)
{
AtalaImage img = new AtalaImage(1000, 8000, PixelFormat.Pixel24bppBgr);
Canvas c = new Canvas(img);
for (int block = 0; block < img.Height; block += 1000)
{
for (int line = 0; line < 1000; line += 4)
{
int y = block + line;
c.DrawLine(new Point(0, y), new Point(img.Width, block), new AtalaPen(Color.Yellow));
c.DrawLine(new Point(0, y + 1), new Point(img.Width, y + 1), new AtalaPen(Color.Red));
c.DrawLine(new Point(0, y + 2), new Point(img.Width, y + 2), new AtalaPen(Color.Green));
c.DrawLine(new Point(0, block), new Point(img.Width, y + 3), new AtalaPen(Color.Blue));
}
}
JpegEncoder jpeg = new JpegEncoder(100);
img.Save("10mb.jpg", jpeg, null);
}
}
}
If you make the image pixel size larger, the JPEG file will get larger. You could also add in meta-data, but it's hard to get a big file with just meta-data as there are some size limitations.
PDF is the easiest -- just make a big page with uncompressed image and keep adding pages -- it will get big fast -- there's no compression unless you turn it on. You can do this easily in DotImage with the PdfEncoder
-- just give it a list of jpgs in a FileSystemImageSource
-- code not shown as to not bore everyone, but I'd be happy to provide it to anyone that wants it -- just call Atalasoft and ask for me (or open a support case and reference this question.