Sure. Textpattern has an Article image feature, which lets you attach a photo to each article.

All you need to do is use an article form that includes the <txp:article_image /> tag. Each time you want to post a new image, create a new article with the image attached.

You can manage the images themselves using Textpattern’s image upload feature, or upload them yourself using FTP if you’d prefer.

For more detailed instructions, read Creating a photoblog with Textpattern.