csv2json.py

import csv
import json

f = open( 'photos.csv', 'r' )
reader = csv.DictReader( f, fieldnames = ( "thumbpath", "imgpath", "imgsrc", "width", "height", "thumbsrc", "thumbwidth", "thumbheight" ) )
out = json.dumps( [ row for row in reader ] )
print out

csv2json.rb

# CSV require
require 'csv'

# JSON require
require 'rubygems'
require 'json'

array = []

CSV.open('photos.csv', 'r', ',') do |row|
  array << row.collect { |e| e.to_s }
end

p array.to_json

photos.csv