You can use any PDF Converter to convert PDF to images and edit it in Adobe Photoshop. But what if you just want to convert a portion of a PDF to an image? Well, here's a cool cropping trick to help you out.
Click the Send to Photoshop 
button. No more copy-and-paste!
Select your desired graphical element, and click the Send To Photoshop icon on the tool bar, or from the menu Send->Send To Photoshop. Done!
PDF Copy Paste first searches for an active Adobe Photoshop window, and decides if your desired content can be copied and pasted into the active window; the software would otherwise create a new Photoshop window, and paste the content into the new window.
This feature saves you time and effort that would otherwise spent on the dreary copy-and-paste operations. All are streamlined to one mouse click.
Here are two examples,
Example A: Send a portion of a PDF file to Adobe Photoshop
1. Start PDF Copy Paste
2. Use the cropping tool to select your desired graphical element
3. Click the Send To Photoshop button on the tool bar
4. Wait for a few seconds until the Connecting to Photoshop... message disappears from the status bar, and see your selected portion is sent to an Adobe Photoshop window.
Example B: Send a full page to Adobe Photoshop
1. Start PDF Copy Paste
2. Navigate to the page of your interest
3. Click the Send To Photoshop button on the tool bar
4. Wait for a few seconds until the Connecting to Photoshop... message disappears from the status bar, and see your selected portion is sent to an Adobe Photoshop window.
Note: You can only send your selected portion or your PDF page as an image to Adobe Photoshop. If you wish to send your content to Adobe Photoshop as searchable text, you have to copy it as text and paste it to text tool area in Adobe Photoshop document.