I cann't merge some transparency pictures by 16x16 and show that clearly in a Winform in the dark background on Windows？

[lyscop]

ImageMagick version

ImageMagick-6.9.12-portable-Q16-x64

Operating system

Windows

Operating system, version and so on

Windows 10

Description

I use ImageMagick6 the newest version to merge some transparency pictures by 16x16 I prefer or by 64x64, and it shows well in the white background, like the picture viewer in Win10.

When I put it into a Winform with transparency backcolor, the picture will not show clearly.

As I know, it is not easy to show the 16x16 picture in the Winform clearly.

So does it, even I try to use drawing in C# to merge pictures and then show it in the Winform.

Also, after merging in normal each picture shows clearly no matter in the Winform.

The size of each picture is like 128x128 or 512x512

The reason I merge the pictures to show in a Winform is that each icon will flick if I put it in the Label or Picturebox to the Form, so I think about whether I can merge them into one and show directly.

Is it a way to merge the picture with backcolor transparency by 16x16 and shows it clearly in Winform?

Before merging separate icon shows in the Winform Picturebox

After merging

background normal

background transparency

I update all the icons in the following appendix

Steps to Reproduce

montage "C:\Users\Administrator\Downloads\icons\StrokesPlus_32512.ico" "C:\Users\Administrator\Downloads\icons\WORDICON_200.ico" "C:\Users\Administrator\Downloads\icons\EXCEL_257.ico" "C:\Users\Administrator\Downloads\icons\Acrobat_1.ico" "C:\Users\Administrator\Downloads\icons\mspaint_2.ico" "C:\Users\Administrator\Downloads\icons\QQ_129.ico" "C:\Users\Administrator\Downloads\icons\explorer_ICO_MYCOMPUTER.ico" -tile x1  -geometry 16x16+2+2 montage.png

icons.zip

Images

No response