Today, Genko asked on my blog why the rotated text cannot be seen clearly. That’s because images are composed of pixels. When you want to rotate an image, the position of the pixels will change relatively, but the pixels are still arranged in a matrix. Pixels will not be rotated when the canvas is rotated. Therefore, you need to choose the appropriate "interpolation" method here.
For an introduction to "difference", please see "A Brief Analysis of Photoshop "Interpolation" to Enlarge Image"
Ctrl+K opens the preferences dialog box, as shown below:
The drop-down menu in the picture is:
nearest neighbor "nearby"
bilinear "twice linear"
bicubic "twice cubed"
bicubic smoother "twice cubed (smoother)"
bicubic sharper "bicubic (sharper)"
I choose these 5 different difference methods in turn to calculate the deformation of the image. Relatively speaking, using nearest neighbor "nearest neighbor" is better for deforming text.
nearest neighbor "nearby"
bilinear "twice linear"
bicubic "twice cubed"
bicubic smoother "twice cubed (smoother)"
bicubic sharper "bicubic (sharper)"
Summary: Which interpolation method to use depends on the specific image.