VISA PHOTOS

Mexican passport photos are of a fairly simple nature. The main requirements are:

The picture should be submitted in 4 copies. While 3 is the official quantity required, the authorities are known to often ask for an additional one while the application is being processed and submitting an extra one will save time.
The photos should be of the standard size – 3.5cms X 4.5cms
They should be in color and taken against a white or lightly colored background.
You should be looking directly at the camera. Pictures even slightly in profile have been known to be rejected.
Your face should fill between 70 to 80% of the photo area.
One important requirement is that the photos should be images captured on film and printed on photographic paper. Digital image printed out on glossy paper like you would do for photos you have taken are not accepted.
Mexican Visa photos should meet the same specifications as the passport ones. Once again it is advisable to submit and extra copy (4 in all) of your photos along with the visa application to be in the safe side.

While the specs Mexican visa and passport photos are not as highly defined as those of some other countries, be careful not the take the requirements for granted and ensure that you submit the right kind of photos.

Citizens of some countries do not require visas to enter Mexico. Before travelling to the country is makes sense to check with the Mexican Embassy nearest you as to whether or not you need a visa.

Visa Photos Canada

The face must be square to the camera with a neutral expression, neither frowning nor smiling, with the mouth closed.
Provide two photographs of yourself and each accompanying family member with your application.

Photographs must be printed on quality photographic paper.
The photographs must be identical and taken within the last six months. They may be either black and white or color.

The photographs must be clear, well defined and taken against a plain white or light-colored background.
If the photographs are digital, they must not be altered in any way.

Your face must be square to the camera with a neutral expression, neither frowning nor smiling, and with your mouth closed.

You may wear non-tinted prescription glasses as long as your eyes are clearly visible. Make sure that the frame does not cover any part of your eyes. Sunglasses are not acceptable.

A hairpiece or other cosmetic accessory is acceptable if it does not disguise your normal appearance.

If you must wear a head covering for religious reasons, make sure your full facial features are not obscured.

Link: http://travel.state.gov/visa/temp/info/info_1287.html#

US Nonimmigrant Visa Photograph Requirements

The photograph format required for the nonimmigrant visa has changed. This format is similar to that required for U.S. passport processing.

Photographers can select Photography Guide for detailed information to assist in preparing quality photographs.

Applicants, submit your Nonimmigrant Visa Application, DS-156 with the new photo format, as explained below.

General:

- The photograph for each visa applicant must be an unmounted, full face photo, as described below

- The photograph must have been taken within the last six months
One (1) photograph must be submitted stapled or glued to the application DS-156

Photo Size:

The photo for each visa applicant submitted must measure:

2 by 2 inches (roughly 50 mm square) with the head centered in the frame.

The head (measured from the top of the hair to the bottom of the chin) should measure between 1 inch to 1 3/8 inches (25 mm to 35 mm) with the eye level between 1 1/8 inch to 1 3/8 inches (28 mm and 35 mm) from the bottom of the photo
Photo Appearance