From my reading of your question, it seems possible that the things you’re researching aren’t explicit or objectively arousing. In that case, the suggestions for using filters won’t help much. And certainly, if the things you are looking at aren’t usually arousing, to the average person, then you didn’t sin in beginning to look at them.
HOWEVER, no one person is “the average person”. If these things are arousing to you, then this research is an occasion of sin for you. Now, you must avoid the occasion to sin (in this case, stop the research) unless there is some justifiable good end that outweighs the risk*. Ask yourself whether there is.
*Obviously, I’m not saying that the end justifies the means, but let’s use another example of near occasions to sin and what’s justified and unjustified.
Tom and Mary are engaged. Let’s talk about a few of the occasions of sin they’re in, and which are justified.
A) Mary finds that, when she works on wedding plans, she tends to begin daydreaming about her future life which for some reason, often turns, (without her intending it to) to strong lustful thoughts.
B) Both Tom and Mary tend to fall into sin when they’re together after a certain time.
Neither of the actions taken are actually sinful, both are occasions to sin. However, one of them are justified, and the other not.
In A, Mary is justified in continuing to plan the wedding. After all, it needs to be done. She ought to pray and take extra care to avoid falling into temptation, but she doesn’t need to stop planning.
In B, there’s no sufficiently grave reason for Tom and Mary to remain in that situation. It is good for a couple discerning marriage to spend time together, but if the time of day is a problem, they should plan accordingly.
Of course, things aren’t always so cut and dried. As other posters have said, talk to a good priest. He’ll help you to determine whether the end of your research is worth the risk.