What are some tools that I can use to evaluate my corporate image? How do I know the image that I built is the image that people perceive?

The best way to evaluate this is to take an opinion from your customers, launching a promotion such as filling out a small questionnaire for about 10% off on product and services for a limited time can help you get a better insight into what people think about you. Also other way includes your Social Media interaction, how likely are people to make your brand go viral. Performance wise different Analytics tool can tell you about your audience and how they interact with your website. There are many more ways to measure this.

In terms of digital marketing, you can use Google Analytics and check your brand terms visits. Plus you can set your Google Alerts on your brand name to check what people are talking about your brand.

I think that create good Image for your corporate is essential whether you are working in the Marketing or Sales. There are several tools used to reaching out with Customers and all people. Some of these tools by direct dealing with people and interaction with them and listening to their opinion and proposals by filling up some Customer promotion forms or through the presentation or meetings with various categories of people and customers or by using other tools as internet webinars and the Social Media contacts and dialogues.

Your constantly reaching out with customers and all people and creating real relationships with all categories of people and customers will make you know that the image, you have already built is the same image of people perceive.

the corporate image

for small one my be so difficult rather than the other big 

mainly 

focused questionnaire (as probing tools) directed to all customer levels

you can probe individually (for small co)