Qualitätsprobleme, wer kann helfen?

1. The first image looks like private homes. Do you have signed property release forms from the property owners/tenants?  You’ll need their permission to sell such images commercially. 
   https://helpx.adobe.com/stock/contributor/content-policies-guidelines/model-property-releases/property-release-overview.html
    
2. Unsure. 
    
3. The bromeliad flower has some focus issues. I think you held your camera too close. Next time, try pulling back a bit. For comparison, this is what you’re competing with in Stock inventory.
   https://stock.adobe.com/search?k=bromeliad 

Also read the 4-part photography requirements from your Contributor User Guide, starting here:

https://helpx.adobe.com/stock/contributor/submit-your-content/submit-photos/photo-submission-overview.html

Hope that helps.

Ingrid, I recommend asking for feedback, not for opinions… everybody has one different.

Adobe’s contributor forum changed the way attached photos can be previewed. Giving opinion in focus is very difficult when we can't see the original shot. You have to be the best judge not to submit soft focus assets.

The second photo is my favorite, unfortunately it’s noticeable  it was shot with a slow shutter speed that created camera movement (we call camera shake) 

What are you editing with? with Lightroom or Photoshop you can bring a lot more out of any shot. In the first shot for example, darken the sky, add a little contrast, and some other minor details. The shot now its fine, but “in my opinion” much stronger if you could have zoom in so that buyers notice the buckets making the house pillars, That’s the real value on that shot. When you shoot a scene like that, you should be able to have at least 4-8 shots with different variations, horizontally, vertically, wider and tight. The flower shot is nice has the same issue, it’s too tight for many buyers and not tight enough for others.

Don’t get discourage, take it all as learning on the job, and continue to be curious and explore with your camera. Watch a lot of YouTube videos to help you improve.

Live and learn with a can do positive mindset!

Francisco

Erstes Bild: 
Das Bild ist nicht richtig scharf. Du musst das Bild bei 100% betrachten.

Außerdem sehe ich Kompressionsartefakte: 

Zweites Bild: Auch hier ist das Bild nicht scharf, betrachtet bei 100%:

Auch hier gibt es wieder Kompressionsartefakte. Ich hätte auch etwas mehr Kontrast erwartet.

Bild 3: Hier gibt es eindeutig Rauschen. 

Das Rauschen siehst Du, wie alle anderen Fehler auch, wenn Du Dein Bild bei 100% betrachtest.

Weitere Artefakte: 

Die Blüte ist nicht gestochen scharf. Außerdem sind die Farben wenig ansprechend. Wenn das kein Ablehnungsgrund ist, dann wird das die potenziellen Käufer abschrecken.

Vielen Dank für Deine Antwort! Kannst du bitte Zusammensetzung präzisieren? Bei welchem Bild und wo ist Unschärfe? Wie sehe ich Rauschen? Bitte gib mir eine Beispiel. Liebe Grüsse

The issues are composition, blur, and noise.
Also, don't forget to zoom in to 100% to check the image before submitting it.