In the last two posts, I delved into how well Photoshop (Ps) does in minimizing photon noise when downsizing images using bilinear and bicubic sharper interpolation. Today I’m turning my attention to Lightroom (Lr). With Lr, you don’t get to choose your resampling algorithm or the gamma of the space in which Lr does the… [Read More]
Archives for September 23, 2014
Noise effects of Photoshop Bicubic Sharper downsizing
Same test image as yesterday 4000×4000 monochromatic, 16-bit gray gamma 2.2, filled with a constant signal of half-scale, (0.5, 127.5, or 32767.5, depending on how you think of it), with Gaussian noise with standard deviation of 1/10 scale added to it. The image was created in Matlab, written out as a 16-bit TIFF, read into… [Read More]