Getting high-definition images on Google is relatively simple. First, you will need to type in your search query in the Google search bar. Then, you will need to click on the "Tools" option at the top of the page and select "High Resolution" from the "Any Size" drop-down box. This will filter the results to only show images in HD quality. Additionally, if you know the exact resolution for the image you are looking for, you can also specify this in the filter. For example, if you are looking for an image that is 1920x1080, you can select "Custom Size" and input the desired resolution.
The other option is to go to Google Images, click on the "Search Tools" button located at the top of the page and select "High Resolution" as the option under "Any Size". This will also filter the results to only show HD images.
If you want to make sure that the image you are downloading is an HD image, there are a few methods you can use. The first way is to look at the bottom of the page and it should tell you the image resolution. Another way is to hover over the image and the resolution should appear on the top left corner. The last way is to right-click on the image and select “Open image in new tab”. When you do that, the image will open in a new tab and you will be able to see the resolution of the image in the URL.
In summary, to get HD images on Google you will need to type in your search query, click on the "Tools" option, select "High Resolution" from the "Any Size" drop down box and that should filter the results to only show images in HD quality. Additionally, you can use the other methods mentioned above to make sure that the image you are downloading is an HD image.