about quality issues

Hi @BIWAY PARK ,

The first image has grain and color noise and the color has a green tint. The color should be looking natural.

The color of the second image lacks vibrancy. It appears it needs some blacks. It has shallow depth of field and there was a camera shake. It too has noise grains.

For the third picture - I get the feeling the cat was poorly cropped from another background and placed on the current background. I can see the other background around the edge of the subject. Also the subject has noise grains.

The fourth picture is underexposed and noisy.

Zoom in on your files at between 100 and 200% to find the issue.

Best wishes

Jacquelin

Your first 2 have a composition error.

The first has definitly also a white balance issue. You will need to compensate for the tinted window. And there is an exposure issue (or contrast issue). It looks like you used one of those fancy "flatten" filters. That could also explain the strange colours. 

The cat picture has a fake DOF, that does not work. Chek the cat at 100% and you will see artefacts all around her body. EG: the front paws.

Your sunrise/set photo is not level, has noise and shows artefacts, like the white border around the skyline.

The first one has a white balance problem and was shot in a zoo which often prohibits commercial use. The second one is not well composed and has lighting issues. The third one has some weird artifacts around the edge of the cat, probably from using the fake blur mode. The fourth one is noisy and has a leaning horizon.

It seems that they were taken from a mobile phone. From my perspective, it has a digital grain that affects the quality.