Assuming that an identical image, either modified from the original or made based on the original, is being used, here is a better way of citing the source.
This is from APA,
Material adapted from a journal article. Note format is different from References.
Figure #. Description/Note. Adapted from “Title of Article,” by F. M.
Author and C. D. Author, year, Title of Journal, volume, p. xx.
Copyright year by the Name of Copyright Holder. Adapted [or Reprinted]
See this from Wiley
If you wish to republish an already modified figure or table,
permission should be obtained from the source of the modified item,
but the credit line should include reference to the original source(s)
of the material as well as to the source of the modification. If you
wish to republish a previously published figure or table originally
compiled from data from other sources, permission for its re-use must
be obtained from whoever owns the copyright in the compilation. The
credit line should include reference to the source of the compilation,
and to the sources of the original data by using the words ‘Based on’,
‘Compiled from’, or similar, or by using the credit line appearing on
the original compilation.
If you wish to make changes or further changes to content which is
already in the process of being cleared, you may need to reapply for
permission as it is possible that the copyright owner will not like
the new proposed alterations and they are entitled to refuse
See also MTU
I modified a figure from a journal article. Do I need to ask for permission?
It depends. Significant modifications result in a figure that is
uniquely yours. The source of the inspiration or base of the figure
must be acknowledged in your caption. To clarify the source and figure
creator, we recommend a credit line in your caption similar to,
"Figure adapted by author from SOURCE." where SOURCE would be replaced
with an appropriate citation. If the figure is just a tracing of the
original figure, or does not contain a significant amount of
creativity, you have not created it, and must ask for permission.