basic
resolution, defined as the ratio between an image's size in pixels and its physical size (usually in inches) when it is printed on paper.
expressed as ppi—pixels per inch
The resolution is usually 72 or 96ppi
Physical size: 340x190 mm
diag size=10 sqrt(1517) mm =389.487=15.3341 inch
resolution: 1920x1080 px
diag res = 120 sqrt(337) = =2202.907 px
dpi = 120 sqrt(337) *25.4 /10 sqrt(1517) = 143.66 dpi
for wolfarm Sqrt[1920^2+1080^2]*25.4 /Sqrt[190^2+340^2]
1 inch=25.4 mm
dpi=diagonal res in px / diagonal physical size in inches
windows > single-window Mode
file>new or ctrl+n
adjust: width,height,unit
advance: x,y-res,colorspace,precision(bit),gamma,color-profile,fill with,comment
tools groups:
selection tools : rectangular(R),ellipse(E),free(F),foreground,fuzzy(U),by color select(shift+O),intelligent Scissors(I)
paint tools: bucket fill(shift+b),gradient(g),pencil(p),eraser(shift+e),airbrush(a)
ink(i),mypaintbrush(y),clone(c),heal(h),presprective colne,blur/sharpen(shift+u)
smudge(s),dodge/burn(shift+d)
transform tools: align(q),move(m),crop(shift+c),rotate(shift+r),scale(shift+s)
shear(shift+h),presprective(shift+p),3d transform(shift+w),unified transform(shift+t),handle transform(shift+l),flip(shift+f),cage transform(shift+g) wrap transform(w)
paths(b)
text(t)
GEGL operation..
color picker(o)
Measure(shift+m)
zoom(z)
toolbox (ctrl+b)
default colors (d)
swap colors (x)
move tool (m) : move layers,selection and other objects
alignment tool(q) : align or arrange layers or other objects
rectangle(r),ellipse(e) select tool
free(f) : select hand drawn region with free or polygon segments
scissor(i) : select shape using intelligent edge-fittig
foreground select tool
https://docs.gimp.org/2.10/en/
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