Try to restore high res image import.

[kimsjune]

This aims to fix #8381 by restoring image.name option for readPNG() and consequently Read10X_Image(). The master branch version has "tissue_lowres_image.png" hard-coded. This was not the case in an earlier version, so I just copied it back. There is a scale factor error if the high res image is used, which can be mitigated by:

hires <- Read10X_Image(paste0(data.dir,'spatial',sep=''),image.name='tissue_hires_image.png')
hires@scale.factors$lowres = hires@scale.factors$hires

Also mentioned here.

Hope this can help.

[dcollins15]

Thanks for the PR!

We restored the image.name parameter for Read10X_Spatial in v5.1.0 per your suggestion 👍

We've also introduced the image.scale parameter to SpatialDimPlot and SpatialFeaturePlot so that you can select the appropriate scale factor to use for your image. Closing this PR since the feature has been implemented

We're always appreciative of contributions from external collaborators - thanks again!