Do not output pixel values

Outputting pixel values it tests should probably not be done for images bigger than maybe 100 pixels, as it swamps the log file making failures hard to find.

Start by locating the image tests that print pixel values and trace how their output reaches the log. Confirm the intended size threshold with the issue context, then verify that large-image failures no longer dump pixel values while smaller-image behavior remains covered by tests.

Vom Indexierungsmodell aus dem Issue-Text verfasst.