Either work with a better photographer that can light you in a more flattering way, or lose weight. You can't spot reduce fat on your legs so will have to undergo a lifestyle change to keep your body fat percentage permanently lower. What's your diet and exercise like? Are you always wishing you had slimmer legs or is it just that photo? In which case it's just an unflattering photo.
From your other pictures, your legs are already very slim and toned. I think it's just an unflattering photo. If a photographer shoots you from head height or higher, it will foreshorten your legs, making them look shorter and larger.
There's no way to lose weight on only one part of your body as weight distribution is genetic. The only way is to lose weight overall and you definitely don't need to lose weight anywhere.
I think you need to agree with what everyone's saying, it's an unflattering photo/lighting/pose. i'm not sure i'm keen on it; you have way better in your port on here already.
You do not need to lose any weight at all, your already a size 6 and have stunning legs in the other images. There's always an image we hate out of the set on pictures taken at a shoot, and unfortunately we can't always stop the photographers from using it if they wish to. If you don't like it you could always speak to the photographer nicely and explain and see if you can come to an arrangement to have it taken down
Pretty close to perfect legs in this and most of the other fotos on your profile:
Delete the picture you don't like, and forget about it.
It's partly because you're standing flat footed, but mostly the angle it's shot from and the lighting.
Wish you were a bit closer to me!
Agree with others, there is absolutely NOTHING wrong with your pins. But, it doesnt matter how good a model is, they can still take an unflattering photo if the pose, lighting and position of the camera isnt correct. We have ALL taken them at some point.
I'll second (third/fourth?) the opinions on here- it's an unflattering photo.
I have very muscular legs in proportion to the rest of me from years of gymnastics/martial arts and what I find helps is always stand on your toes in photos- it makes the legs look longer and more toned. Also, put one leg slightly in front of the other (Victoria Beckham's an expert at it but also check out some art-nude stuff).
You have great legs so do not worry. It is all to do with lighting camera angle pose etc. My wife started Aquafit class a couple of months ago and her legs thighs and bum are all more tones she looks great. So if you feel self concious about your legs remember it is a state of mind. Try aqua fit type exercise and let us know the result. Hope this is helpful good luck.
Your 'problem' can be easily sorted without medication and only a very little exercise. And that exercise is to remove the photograph. Simples! I hope by now you have got the message from all your well wishers.
This image looks to have been taken as a technical check before starting to shoot seriously, and it has several issues, (some mentioned above), which unfortunately do you an unjustified disservice. You even seem to be looking quizically at the photographer waiting for something to happen. Not a good shot - it should be removed anyway. Was that the only shot from this session - I wonder what the others were like?
With experience you will learn how to get the best out of your assetts - how to hold yourself, and the way camera angles work etc. You look fine to me, and doing well. All the right equipment in the right places and in proportion, plus an interesting look to go with it. I'd certainly welcome you in front of my camera.