Plotting a graph of PSNR vs bit rate for an image,after enhancement?

Hi,I want to plot a graph between the PSNR and the bit rate.I have got MSE and PSNR values after enhancing an image.How can I get the bit rate(kbps) to represent the data graphically?

[Eduardo]

Hi, I had the same doubt but I managed to solved in this way:

- You have a picture, you can represent it like a matrix with imread.

- Weight * Height * Frame/second = Pixel/second

- Bits Per Pixel (BPP) = BitRate/(Pixel/Second).

That means, you can play with the value of BPP to obtain different's bitrates. Remember, in a image (and not in a video) you will only see a frame per second, son the time will be 1.

-------------------- But I did it in this way, i just play with the values of the compression ratio to obtain differents values of PSNR:

imwrite(iframe,'iframe.jp2','CompressionRatio',i,'mode','lossy');

When 'i' is the value that you put. I did a for i=1:100 and I obtained different values of PSNR. Remember for a higher Compression Ratio, lower PSNR you will obtained.

I hope this can be useful to you!

Answer 1

[Image Analyst]

Have you tried plot()?

plot(bitRate, PSNR, 'b-', 'LineWidth', 3);
grid on;